CN109644768B - Method for cultivating arborvitae near-natural matrix container seedlings and promoting forest land renewal - Google Patents

Abstract

The application provides a method for cultivating and promoting the regeneration of oriental orientalis near-natural substrate container seedlings. Bags or paper cups, and then timely soaking, germination and sowing, when the seedlings grow 4-6 pairs of primary leaves, transplant them in the rainy season from July to August, and thin the seedlings again after the seedlings survive and successfully overwinter. The use of forest nurseries or indoor containers for seedlings near forest catchments and ponds provides sufficient water for seeds, improves seedling emergence rate and planting survival rate, short seedling breeding cycle, small size and light weight of transplanted seedlings, and it is rainy in the rainy season. Planting in the daytime, the seedlings have high vigor and strong overwintering ability. Reduced the need for a lot of manpower, material and financial resources when using 2-3-year-old seedlings over 1 meter for forest land regeneration. It saves time and labor, saves costs, and improves the update efficiency of the side burlins in the limestone mountains.

Description

A kind of method for cultivating and promoting woodland regeneration of oriental orientalis near-natural substrate container seedlings

technical field

The invention relates to the field of forest land renewal technology and container seedling substrate, in particular to a method for cultivating and promoting forest land renewal by container seedlings of oriental orientalis near natural substrates.

Background technique

There is a large area of orientalis cultivated and distributed in the limestone mountains in northern my country. Arborvitae is resistant to drought and barrenness, and can grow in bare rock mountains with steep limestone slopes, and even on cliffs. Platycladus orientalis has a beautiful crown and is a good ornamental tree species. Not only that, it also has functions such as soil and water conservation, soil improvement and water conservation. The large-scale oriental orientalis plantation established in my country in the 1950s and 1960s is now facing the problem of stand renewal and sustainable management. At present, the problem of no cypress seedlings under the closed forest of oriental orientalis, and few arborvitae in some gaps, is particularly prominent in the northern arid forest area.

At present, the regeneration of Platycladus orientalis is not good, and container seedlings are mostly used for the regeneration and afforestation of Platycladus orientalis, and 2-3 years old seedlings that are labor-intensive and time-consuming in cultivation are generally used. Afforestation with artificially sown container seedlings is currently the main method for afforestation of Arborvitae in limestone mountains, but afforestation with large-sized container seedlings over 1 meter is large and costly.

Given that seeds and seedlings are most sensitive to environmental stress, the problems of germination, emergence and seedling formation are the first problems in arid and barren mountains. The limited germination of seeds is a fundamental and critical factor affecting their regeneration. On the arid and barren limestone mountains, the natural germination of oriental orientalis seeds and the preservation of seedlings mainly occurred in some optimized environments with concentrated and occasional water and soil redistribution. Among them, the most important limiting factors are climatic aridity and soil moisture availability. September is the transition period from the rainy season to the dry season in the main planting area of arborvitae in the north, and it is also a vigorous period for the natural planting of arborvitae. When the seeds mature and land, they often miss the opportunity of germination in the current year. The seedlings that barely germinate are often difficult to survive the drought in autumn and winter. The unsuitable precipitation in spring not only induces the germination of the seeds, but also causes the seeds to germinate or crack in the spring. buds dry up.

Until now, the understanding of the role of woodland litter and humus layer on seed germination and woodland regeneration is inconsistent. Some studies have reported that removing the dead leaf layer under the pine forest can promote the germination of seeds and the growth of new seedlings. Too thick litter is not conducive to the contact of the seeds with mineral soil and is difficult to germinate. The thicker the litter, the worse the rooting of the seedlings. , the less easily the young roots extend into the mineral soil, the easier it is to "hang in the air" and die. The reason is that the dead leaf layer generally has low water content and is easy to dry, and the seeds are difficult to absorb and germinate or wither during the rapid drying process of the dead leaf layer before reaching the mineral soil after germination. It also acts as a barrier. In contrast, some studies have also reported that suitable thickness of litter is beneficial to reduce the loss of forest water, improve soil fertility, and thus promote the germination of seeds. The research on seedling raising in the protected environment shows that suitable pine needle litter and humus mulch can improve the water conditions, which is beneficial to the germination and natural regeneration of pine seeds.

The inventor's preliminary research has shown that there are a lot of oriental orientalis seeds in the fallen leaves and humus that are impacted by surface runoff on the upper edge of the Arborvitae catchment. , which means that as long as there is enough water, the germination of oriental orientalis seeds in the dead leaf layer or the humus layer is not a big problem. In winter, the surface humus soil and cohesive core soil matrix were used to cultivate oriental orientalis seedlings in indoor paper containers under the premise of one-time irrigation of sufficient water. The results show that the surface humus soil is easy to dry and it is difficult to finally unearth seedlings when there are seepage holes. Germinate. In contrast, the cohesive core soil had a higher water-holding capacity, and a small amount (3.3%) of seedlings emerged from the soil (Fig. 1a). If a container with no drainage holes at the bottom is used, the final seedling rate of sowing with surface humus soil is 25.5% after one-time irrigation with enough water, but only 1.1% with sticky core soil. Obviously, under the premise of water security, the surface humus soil is a high-quality natural substrate for the germination of oriental orientalis seeds.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a method for cultivating and promoting the regeneration of forest land by cultivating orientalis orientalis near-natural substrate container seedlings.

For solving the above-mentioned technical problems, the technical scheme provided by the present invention is:

A method for cultivating and promoting woodland renewal of oriental orientalis near-natural substrate container seedlings, comprising the following steps:

1) First prepare the seedling container, then fill the seedling container with a layer of orientalis core soil, and then fill the seedling container with a layer of orientalis surface humus. The surface layer humus is arranged in layers, the core soil of the orientalis is in the lower layer, and the surface layer humus of the orientalis is in the upper layer;

2) One to two weeks before the rainy season, the oriental orientalis seeds are soaked in warm water with an initial temperature of 40°C for 48 hours and placed in a plastic tray, and then the oriental orientalis seeds are covered with wet gauze at 18-25°C naturally. Germination is carried out in a room temperature environment, and during the germination process, water is added to the oriental orientalis seeds to keep the oriental orientalis seeds moist;

3) Indoor sowing and seedling raising: when 30%-50% of all the oriental orientalis seeds have split mouths, sow the oriental orientalis seeds into the prepared oriental orientalis top layer humus and oriental orientalis core soil prepared in step 1). In the seedling container, each seedling container is sown with 10-20 arborvitae seeds;

4) thinning: the germinated seedlings are thinned to retain 3-5 robust seedlings in each seedling container;

5) Transplanting to woodland: When the seedlings grow 4-6 pairs of primary leaves, choose a suitable location to dig holes in the thorax during the rainy days from July to August in the rainy season, and then tear off the seedling container first, and then tear off the Put the soil-bearing seedlings left after the seedling container is dropped into the hole, and then fill with soil, steadfastly and water in sequence;

6) After the seedlings survive and successfully overwinter, thin the seedlings again, and keep 1-2 plants in each hole.

Preferably, in step 1), the seedling container is a non-woven bag or a paper cup.

Preferably, in step 1), the volume ratio of the surface layer humus soil of the orientalis to the core soil of the orientalis is 1: (1-2).

Preferably, in step 1), when the pH of the orientalis core soil is 8-10, an acidic fertilizer is added to the orientalis core soil, and the acidic fertilizer is ammonium sulfate or ferrous sulfate.

Preferably, in step 1), use a soil filling device to fill the oriental core soil and the orientalis surface humus into the seedling container;

The soil filling device includes a substrate tank, a horizontal hand-held rod, a sealing plate, a switch control rod and a bolt;

The substrate tank includes a circular tube at the upper part and a conical tube at the lower part, the top of the circular tube is open for feeding, and the bottom end of the circular tube is welded to the large inner diameter end of the conical tube, and the circular tube is connected by welding. There are scale lines on the inner wall of the tube;

The sealing plate is used for sealing the bottom opening at the small inner diameter end of the conical tube;

The right end of the horizontal hand-held rod is welded and fixed on the top of the round pipe for manually holding the soil filling device;

The switch control rod includes a left horizontal rod, a middle vertical rod and a right horizontal rod, the length directions of the left horizontal rod, the middle vertical rod and the right horizontal rod are all located in the same vertical plane, and the left horizontal rod The right end of the middle vertical rod is welded and fixedly connected with the top end of the middle vertical rod, and the bottom end of the middle vertical rod is welded and fixedly connected with the left end of the right horizontal rod;

The left horizontal rod is located below the horizontal hand-held rod, and the screw rod of the bolt penetrates the horizontal hand-held rod and the left horizontal rod from top to bottom, so that the left horizontal rod and the horizontal hand-held rod form a bolt The hinged connection enables the left horizontal rod to rotate in the horizontal plane;

The right end of the right horizontal rod is welded and fixed to the sealing plate, and the rotation of the left horizontal rod in the horizontal plane drives the sealing plate to rotate in the horizontal plane to open or close the bottom opening of the conical tube.

Preferably, in step 3), oriental orientalis seeds are sown into the upper layer of oriental orientalis surface layer humus in the seedling container, and the sowing depth is 1.0 cm-1.5 cm.

Preferably, in step 5), selecting a suitable location to dig a hole refers to the catchment slope, the woodlands and gaps on both sides of the valley, and the ridges and ridges after land preparation and fine-tuning the flow of rainwater.

Preferably, in step 5), first tear off the seedling container, then put the soil-bearing seedlings left after tearing off the seedling-raising container into a plastic water collecting cup for water collection, and then put the soil-bearing seedlings Put the plastic water collection cup into the hole.

The present application provides a method for cultivating orientalis near-natural matrix container seedlings and promoting forest land renewal, wherein the orientalis core soil and the oriental orientalis surface humus in the seedling raising container are arranged in layers, and the oriental orientalis core soil is in the lower layer, The oriental orientalis surface humus is in the upper layer, and then the seeds of oriental orientalis are soaked and germinated. When 30%-50% of all the oriental orientalis seeds are cracked, the oriental orientalis seeds are sown into the oriental orientalis surface humus. 10-20 oriental orientalis seeds are sown in each seedling container in the seedling containers with the core soil of oriental orientalis. When the seedlings are unearthed and grow 4-6 pairs of primary leaves, they will be placed in oriental orientalis during the rainy season from July to August in the rainy days. Choose a suitable place to dig a hole in the ground, put the soil-bearing seedlings left after tearing off the seedling container into the hole, then fill in soil, steadfastly and water in turn, and thin the seedlings again after the seedlings survive and successfully overwinter, and keep 1 in each hole. -2 plants are appropriate;

In the present invention, the upper and lower layers are combined with the soil core soil of oriental orientalis with excellent water retention performance and the surface layer humus of oriental orientalis rich in nutrients and good ventilation, and the seedlings of non-woven fabrics or paper cup containers are successfully used for the regeneration and planting of oriental orientalis. Test, the survival rate is high and the effect is good;

The invention successfully realizes the germination of oriental orientalis seeds and the cultivation of seedlings under indoor irrigation conditions through the development of near-natural substrates and their preparation and filling technologies. On this basis, the forest cultivation of container seedlings is realized, which effectively promotes the renewal of the orientalis. The method is simple, the cost is low, a lot of manpower and material resources can be saved, the efficiency is high, and the substrate source is reliable. This technology is suitable for setting up forest nurseries with local materials to promote the renewal of thorax, and provides a method to promote the rapid renewal and expansion of thorax through redistribution of water and soil and planting of seedlings in the limestone steep slope environment with serious soil erosion, which is beneficial to our country. The northern side Berlin creates a practical technique for artificially promoting regeneration and maintaining sustainable forest land.

Description of drawings

Figure 1a shows the seedling emergence rate of simple lateral humus (humus soil in Figure 1a) and lateral soil core soil (clay core soil in Figure 1a) under the condition of whether there are drainage holes at the bottom of the seedling container. Compared;

Figure 1b shows the comparison of the germination rates of different combinations of oriental orientalis surface humus soil and oriental orientalis core soil: the 2+2 layer is 2 cups of oriental orientalis surface humus + 2 cups of oriental orientalis core soil Layered configuration, humus on top, core soil on bottom; 2+2 mix is a mix of 2 cups lateral humus + 2 cups lateral soil; 1+3 is 1 cup lateral Berlin surface The mixed configuration of humus soil + 3 cups of lateral Berlin earth core soil; 3+1 mixed configuration is the mixed configuration of 3 cups of lateral Berlin surface humus + 1 cup of lateral Berlin geo core soil;

2 is a schematic structural diagram of a seedling raising container and a plastic water collecting cup sleeved together according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a soil filling device provided by an embodiment of the present invention.

In the picture: 1 side Berlin surface humus, 2 side Berlin core soil, 3 seedling containers, 301 drainage holes, 4 plastic water collecting cups;

5 Substrate tank, 501 round tube, 502 conical tube, 6 horizontal hand-held rod, 7 sealing plate, 8 switch control rod, 801 left horizontal rod, 802 middle vertical rod, 803 right horizontal rod, 9 bolts.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "central", "axial", "radial", "longitudinal", "transverse", "length", "width", "upper", "lower" , "front", "rear", "left", "right", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. indicate the orientation or position relationship as Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood to limit the present invention.

Referring to Figures 1a-3, Figure 1a shows the simple humus on the surface of the oriental orientalis (humus soil in Figure 1a) and the core soil of oriental orientalis (the clay core soil in Figure 1a) under the condition that there are no drainage holes at the bottom of the seedling container. ) The comparison of the emergence rate during seedling raising; Figure 1b is the comparison of the emergence rate of the different combinations of the lateral Berlin top layer humus soil and the lateral Berlin core soil: the 2+2 layer is 2 cups of lateral Berlin top layer humus soil + 2 cups of terrestrial core soil layered configuration, humus on top, core soil on the bottom; 2+2 mix is a mixed configuration of 2 cups of terrestrial humus + 2 cups of terrestrial core soil; 1+3 The mixture is a mixed configuration of 1 cup of lateral Berlin surface humus + 3 cups of lateral Berlin core soil; 3+1 mixing is a mixed configuration of 3 cups of lateral Berlin surface humus + 1 cup of lateral Berlin core soil; Figure 2 shows A schematic structural diagram of a seedling raising container and a plastic water collecting cup provided by an embodiment of the present invention; FIG. 3 is a structural schematic diagram of a soil filling device provided by an embodiment of the present invention.

The application provides a method for cultivating and promoting the regeneration of oriental orientalis near-natural substrate container seedlings, comprising the following steps:

1) First prepare the seedling container, then fill the seedling container with a layer of orientalis core soil, and then fill the seedling container with a layer of orientalis surface humus. The surface layer humus is arranged in layers, the core soil of the orientalis is in the lower layer, and the surface layer humus of the orientalis is in the upper layer;

2) One to two weeks before the rainy season, the oriental orientalis seeds are soaked in warm water with an initial temperature of 40°C for 48 hours and placed in a plastic tray, and then the oriental orientalis seeds are covered with wet gauze at 18-25°C naturally. Germination is carried out in a room temperature environment, and during the germination process, water is added to the oriental orientalis seeds to keep the oriental orientalis seeds moist;

3) Indoor sowing and seedling raising: when 30%-50% of all the oriental orientalis seeds have split mouths, sow the oriental orientalis seeds into the prepared oriental orientalis top layer humus and oriental orientalis core soil prepared in step 1). In the seedling container, each seedling container is sown with 10-20 arborvitae seeds;

4) thinning: the germinated seedlings are thinned to retain 3-5 robust seedlings in each seedling container;

5) Transplanting to woodland: When the seedlings grow 4-6 pairs of primary leaves, choose a suitable location to dig holes in the thorax during the rainy days from July to August in the rainy season, and then tear off the seedling container first, and then tear off the Put the soil-bearing seedlings left after the seedling container is dropped into the hole, and then fill with soil, steadfastly and water in sequence;

6) After the seedlings survive and successfully overwinter, thin the seedlings again, and keep 1-2 plants in each hole.

In an embodiment of the present application, in step 1), the seedling raising container is a non-woven bag or a paper cup.

In an embodiment of the present application, in step 1), the volume ratio of the surface layer humus soil of oriental orientalis to the core soil of oriental orientalis is 1: (1-2).

In one embodiment of the present application, in step 1), when the pH of the Pterocarpus earthen soil is 8-10, an acid fertilizer is added to the Pterocarpus earthen soil, and the acid fertilizer is ammonium sulfate or ferrous sulfate .

In an embodiment of the present application, in step 1), use a soil filling device to fill the seedling container with earth core soil and humus on the surface layer of oriental orientalis;

The soil filling device includes a matrix tank 5, a horizontal hand-held rod 6, a sealing plate 7, a switch control rod 8 and a bolt 9;

The substrate tank 5 includes a circular pipe 501 located at the upper part and a conical pipe 502 located at the lower part, the top of the circular pipe 501 is open for feeding, the bottom end of the circular pipe 501 and the large inner diameter end of the conical pipe 502 Welding connection, the inner wall surface of the circular tube 501 is provided with a scale line;

The sealing plate 7 is used to block the bottom opening at the small inner diameter end of the conical tube 502;

The right end of the horizontal hand-held rod 6 is welded and fixed on the top of the circular pipe 501 for manually holding the soil filling device;

The switch control rod 8 includes a left horizontal rod 801, a middle vertical rod 802 and a right horizontal rod 803. The length directions of the left horizontal rod 801, the middle vertical rod 802 and the right horizontal rod 803 are all located on the same vertical plane. Inside, the right end of the left horizontal rod 801 is welded and fixedly connected with the top end of the middle vertical rod 802, and the bottom end of the middle vertical rod 802 is welded and fixedly connected with the left end of the right horizontal rod 803;

The left horizontal rod 801 is located below the horizontal hand-held rod 6, and the screw rod of the bolt 9 penetrates the horizontal hand-held rod 6 and the left horizontal rod 801 from top to bottom for the left horizontal rod 801 and all The horizontal hand-held rod 6 constitutes a bolt hinged connection so that the left horizontal rod 801 rotates in the horizontal plane;

The right end of the right horizontal rod 803 is welded and fixed to the sealing plate 7 , and the rotation of the left horizontal rod 801 in the horizontal plane drives the sealing plate 7 to rotate in the horizontal plane to open or close the bottom of the conical tube 502 . Open your mouth.

In an embodiment of the present application, in step 3), oriental orientalis seeds are sown into the upper layer of oriental orientalis surface layer humus in the seedling container, and the sowing depth is 1.0 cm to 1.5 cm.

In an embodiment of the present application, in step 5), selecting a suitable location to dig holes refers to the catchment slope, the woodland and gaps on both sides of the valley, and the ridges and ridges after land preparation and fine-tuning of the rainwater flow.

In an embodiment of the present application, in step 5), the seedling container is first torn off, and then the soil-bearing seedlings left after tearing off the seedling container are put into a plastic water collecting cup for water collection, and then Put a plastic water collection cup with soil-covered seedlings into the hole.

In this application: 1. Near-natural substrates

The container seedling substrate used in the present invention is a kind of near-natural substrate material, and the so-called near-natural substrate is to use the earth core soil (usually cohesive cinnamon soil) as the bottom substrate, and the surface layer of humus soil as the upper substrate The double-layer composite seedling matrix.

The advantages of this seedling substrate are: simulating the natural environment of the soil under Platycladus orientalis and improving it, the material is reliable, and the source is sufficient. Under the condition of using this method, the seeds germinate quickly, emerge neatly, and have a high germination and survival rate.

In contrast, when planting seedlings simply using orientalis geocore soil as the matrix, although the water retention performance is excellent, the structure is sticky, easy to harden, and the air permeability is poor. For some strongly alkaline soils, the core soil has a certain influence on seed germination and unearthed, especially in the sunny slope environment.

When the seedlings are raised with the humus that is not fully decomposed on the surface layer, although the structure is loose and the permeability is good, the water retention performance is poor, and it is easy to dry, which is not conducive to the germination and unearthed of the seeds.

If the two are combined in a layered configuration, it can achieve the effects of water and fertilizer retention, ventilation and ventilation, and optimization of the seed germination environment.

Through the design of paper cup containers with different matrix combinations (with drainage holes at the bottom), the results (Fig. 1b) show that the humus and core soil layering ratio is 1:1. The combination effect is the best, and the emergence rate is the highest; when the humus soil and the cohesive core soil are mixed and configured in the ratio of 1:1, 1:3 and 3:1, the seeds germinate the soil sooner or later, the germination rate and the number of seedlings. are lower than the combination of upper and lower layered configurations. After a large number of tests and inspections, the seedlings were successfully raised. So that the seeds can germinate and emerge by irrigating enough water at one time after sowing. In addition, if acid fertilizer is added to the core soil for improvement, it is more beneficial to seed germination and planting in woodland.

2. Matrix source and container filling

2.1 Matrix source and its advantages

A terrestrial humus soil: derived from the soil of the A1 layer under the terpenoid, which is characterized by: rich in organic matter, humic acid and a small amount of vitamins and trace elements, which are favorable conditions for promoting seed germination and seedling growth, and are The materials of general seedling substrates (vermiculite, perlite, straw and plant ash) are incomparable, and they are more suitable for natural regeneration of orientalis, especially in the mountain and steep slope environment, where the soil humus layer is often washed away due to soil erosion.

B. orientalis core soil: It is derived from the core soil layer of the lower cinnamon soil of oriental orientalis. It is preferable to apply acidic fertilizers such as ammonium sulfate or ferrous sulfate, or to use customer-sourced core soil such as the core soil of slightly acidic mountain brown loam. In view of the fact that oriental orientalis is often cultivated under the condition of mountain brown soil with limestone as parent rock, oriental orientalis core soil is relatively sticky and heavy and lacks organic matter and nitrogen, however, its water-holding properties are beneficial to the germination of oriental orientalis seeds.

2.2 Container filling

The container used in the present invention is a commercially available non-woven bag or paper cup, and the size of the container can be adjusted appropriately according to the environment and target of renewing the forest land. The volume ratio of substrates A and B is preferably 1:1 or 1:2.

3. Filling device and use

In order to improve the filling speed and ensure accurate ratio, a simple and quick filling device is designed in the present invention, and the filling device includes a matrix tank 5 , a horizontal hand-held rod 6 , a sealing plate 7 , a switch control rod 8 and a bolt 9 (Figure 3).

When using, first use the switch lever 8 to close the sealing plate 7, then pour the substrate B into the substrate tank 5 to the specified scale, then place the opening of the seedling container under the bottom opening of the substrate tank 5, and then use the switch lever 8. Open the sealing plate 7, let the substrate B leak into the bottom of the seedling container, and then fill the substrate A after a little bit of hard work. Then use the switch lever 8 to close the sealing plate 7, pour the substrate A into the substrate tank 5 to the specified scale, then place the opening of the seedling container under the bottom opening of the substrate tank 5, and then use the switch lever 8 to open the sealing plate. 7. Make the substrate A leak into the seedling container, and then use it after a little bit of hard work.

4. Plastic water collection cup attached to the container

The limestone mountains are dry and barren, with severe soil erosion, and regeneration or afforestation in similar environments are suitable for additional catchment devices. The plastic water collecting cup shown in FIG. 2 can collect the abundant rainwater in the rainy season into the plastic water collecting cup, so as to maintain the water supply for a longer period of time before the seedlings that emerge from the soil are completely independent. The plastic water collecting cup has a simple design and is shaped like a plastic cup with a larger opening than a seedling container, and can also be replaced by a plastic bottle bottom of a similar size. As shown in Figure 2, when the bottom of the seedling container is covered with a plastic water collection cup for water collection, a drainage hole needs to be opened on the bottom wall of the seedling container for the back and forth circulation of water between the seedling container and the plastic water collection cup. In Fig. 2: humus soil 1 on the surface layer of oriental orientalis, core soil 2 on oriental orientalis, seedling container 3, drainage holes 301, and plastic water collecting cup 4. Preferably, some round holes are opened in the middle and upper part of the side wall of the seedling container so that the root system of the seedling can expand outward, or the soil-bearing seedlings left after tearing off the seedling container are directly put into the plastic water collecting cup for water collection, and then the Put a plastic water collection cup with soil-covered seedlings into the hole.

5. Indoor soaking, germination, sowing and seedling raising

One to two weeks before the rainy season, mature, plump and vigorous oriental orientalis seeds are selected and soaked in warm water with an initial temperature of 40°C for 48 hours, then placed in a plastic tray, and then covered with wet gauze on the oriental orientalis seeds at room temperature. The germination was carried out at an environment of 18-25 °C, and during the germination process, water was added to the oriental orientalis seeds at any time to keep the oriental orientalis seeds moist.

When 30%-50% of all the oriental orientalis seeds have split mouths, the oriental orientalis seeds are sown into the seedling container containing the oriental orientalis surface humus and the oriental core soil, and the sowing depth is about 1.0 cm. Sow 10-20 arborvitae seeds per seedling container; it is advisable to keep 3-5 robust seedlings for thinning.

6. Update planting

When the seedlings grow 4-6 pairs of primary leaves, choose a suitable place to dig a hole in the side Berlin on the rainy days from July to August in the rainy season, then tear off the seedling container first, and then tear off the seedling container. The soil-bearing seedlings are placed in the hole, and then filled with soil, steadfast, and watered in sequence.

7. Simple drip irrigation system

In order to ensure the survival of container seedlings, a simple drip irrigation system is made with plastic buckets and PE plastic pipes, which can ensure the planting and survival of new seedlings, and prolong the period of seedling cultivation and transplantation until autumn or the following spring. Select suitable woodland and forest gaps on the catchment slope or on both sides of the valley for cultivation, and the renewed seedlings of Arborvitae are easy to survive and preserve. When planting on sites with serious soil erosion on ridges and ridges, it is necessary to properly prepare the land and fine-tune the flow of rainwater to ensure the survival and growth of seedlings. After the seedlings survive and successfully overwinter, thin the seedlings again, and keep 1-2 plants.

The actual technical problem to be solved by the present application is that currently, the mature period of seeds in the Pterocarpus field often encounters a dry period in which the precipitation in autumn gradually decreases in the north. Arborvitae seeds often miss the best time to germinate. In the artificial regeneration of the side burlins, most of the 2-3 year old seedlings above 1 meter are used for planting and afforestation. Large-sized seedlings are large in size and easy to damage the roots during the process of seedling, resulting in a low survival rate. In addition, it is labor-intensive, time-consuming, high-cost and low-efficiency in raising seedlings in the nursery, midway transportation, land preparation and planting, and irrigation. As a result, the large-scale update of the sidecars has put forward overloaded manpower and material requirements.

In contrast, the method provided in the present application firstly obtains materials on the spot, and selects the composite matrix of woodland core soil and humus soil from reliable sources and convenient access. A forest nursery is set up in the low-lying places of catchment pools, ponds, or ditches around the forest land for container seedling, or indoors such as forest protection rooms. Secondly, after the seedlings are raised in the suitable period of the rainy season, the container seedlings with 4-6 pairs of primary leaves are selected for forest cultivation. In addition, a water collector can be attached to the upper part of the arid and barren mountain, through this reverse redistribution of water and soil, the planting survival and preservation rate are greatly improved. Especially after the rainy season and autumn growth, the seedlings grow robustly and have strong vitality, which greatly improves the preservation rate of their overwintering.

In addition, the seedlings are small in size, light in weight, convenient for transportation and planting, and require little manpower and material resources. Under optimal circumstances, it is possible to achieve efficient and optimal renewal of forest land by making good use of the existing forest management mechanism for forest rangers.

The methods and devices that are not described in detail in the present invention are all in the prior art and will not be described again.

The descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (7)

1. A method for cultivating arborvitae near-natural substrate container seedlings and promoting forest land renewal is characterized by comprising the following steps:

1) firstly, preparing a seedling culture container, filling a layer of arborvitae forest land core soil into the seedling culture container, filling a layer of arborvitae forest land surface layer humus soil into the seedling culture container, wherein the arborvitae forest land core soil and the arborvitae forest land surface layer humus soil in the seedling culture container are arranged in a layered mode, the arborvitae forest land core soil is located at the lower layer, and the arborvitae forest land surface layer humus soil is located at the upper layer;

2) soaking Chinese arborvitae seed in warm water with initial temperature of 40 deg.C for 48 hr before rainy season, placing into plastic tray, covering with wet gauze, and germinating at 18-25 deg.C in natural room temperature environment, and supplementing water to Chinese arborvitae seed to keep Chinese arborvitae seed wet;

3) indoor seeding and seedling raising: sowing the platycladus orientalis seeds into the seedling raising containers which are prepared in the step 1) and are filled with the humus soil on the surface layer of the platycladus orientalis forest land and the arborvitae forest land core soil when 30% -50% of all the platycladus orientalis seeds crack, and sowing 10-20 platycladus orientalis seeds in each seedling raising container;

4) thinning: thinning the germinated seedlings to reserve 3-5 robust seedlings in each seedling container;

5) transplanting to a forest land: when 4-6 pairs of primary leaves grow from the seedlings, selecting a proper place to dig holes in the arborvitae forest land in a rainy day of 7-8 months in a rainy season, tearing off a seedling container, putting the seedlings with soil left after tearing off the seedling container into the holes, and then sequentially filling, compacting and watering;

6) thinning again after the seedlings survive and successfully overwinter, and reserving 1-2 plants in each hole;

in the step 1), filling arborvitae forest land core soil and arborvitae forest land surface layer humus soil into a seedling culture container by using a soil filling device;

the soil filling device comprises a matrix tank, a horizontal handheld rod, a sealing plate, a switch control rod and a bolt;

the substrate tank comprises a round pipe positioned at the upper part and a conical pipe positioned at the lower part, the top end of the round pipe is open for feeding, the bottom end of the round pipe is welded with the large inner diameter end of the conical pipe, and the inner wall surface of the round pipe is provided with scale marks;

the sealing plate is used for sealing a bottom opening at the small inner diameter end of the conical pipe;

the right end of the horizontal handheld rod is welded and fixed on the top of the circular tube and is used for manually holding the soil filling device;

the switch control rod comprises a left horizontal rod, a middle vertical rod and a right horizontal rod, the lengths of the left horizontal rod, the middle vertical rod and the right horizontal rod are all located in the same vertical plane, the right end of the left horizontal rod is fixedly connected with the top end of the middle vertical rod in a welding mode, and the bottom end of the middle vertical rod is fixedly connected with the left end of the right horizontal rod in a welding mode;

the left horizontal rod is positioned below the horizontal handheld rod, and a screw rod of the bolt penetrates through the horizontal handheld rod and the left horizontal rod from top to bottom so that the left horizontal rod and the horizontal handheld rod form a bolt hinged connection to enable the left horizontal rod to rotate in a horizontal plane;

the right end of the right horizontal rod is fixedly connected with the sealing plate in a welding mode, and the sealing plate is driven to rotate in the horizontal plane to open or close the bottom opening of the conical tube by rotation of the left horizontal rod in the horizontal plane.

2. The method according to claim 1, wherein in the step 1), the seedling raising container is a non-woven cloth bag or a paper cup.

3. The method as claimed in claim 1, wherein in step 1), the volume ratio of the surface humus soil of the arborvitae forest land to the core soil of the arborvitae forest land is 1: (1-2).

4. The method as claimed in claim 1, wherein in step 1), when the pH of the arborvitae timbery is 8-10, an acidic fertilizer is added to the arborvitae timbery, wherein the acidic fertilizer is ammonium sulfate or ferrous sulfate.

5. The method as claimed in claim 1, wherein in the step 3), the seeds of biota orientalis are sown in the humus soil on the surface layer of the arborvitae forest land at the upper layer in the seedling container to a depth of 1.0cm to 1.5 cm.

6. The method as claimed in claim 1, wherein the step 5) of selecting suitable points for digging holes is selected from a catchment slope, a forest land and a forest window on both sides of a valley, and a ridge beam for land preparation and fine adjustment of rainwater flow direction.

7. The method as claimed in claim 1, wherein in step 5), the seedling container is torn off, then the seedlings with soil left after the seedling container is torn off are placed in the plastic water collecting cup for collecting water, and then the plastic water collecting cup containing the seedlings with soil is placed in the hole.

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