CN109329023B

CN109329023B - A kind of rejuvenation method of ornamental dendrobium plants

Info

Publication number: CN109329023B
Application number: CN201811296665.6A
Authority: CN
Inventors: 龚建英; 吴玉华; 李华; 蒙芳; 王华新; 汪小玉; 龙定建; 陈宝玲; 唐遒冥; 苏莉花
Original assignee: Hunan Academy of Forestry
Current assignee: Hunan Academy of Forestry
Priority date: 2018-11-01
Filing date: 2018-11-01
Publication date: 2021-10-22
Anticipated expiration: 2038-11-01
Also published as: CN109329023A

Abstract

本发明涉及植物栽培领域，具体是一种观赏石斛植株的复壮方法，通过适时修根换盆、基质配制、营养供给以及LED光源系统科学管护相结合的方法，以解决观赏石斛开花过后，植株衰退严重，抗性降低，次年开花品质下降，甚至引进植株死亡等问题，使衰退植株假鳞茎粗壮，叶面平展具有光泽，LED光源系统科学管护能使植株茎秆粗壮抗性强，叶小花艳丽，开花性状好，品质稳定，为观赏石斛育种亲本材料的长期保存，延长种苗使用年限，降低生产成本提供了新技术和方法。The invention relates to the field of plant cultivation, in particular to a method for rejuvenating ornamental dendrobium plants. The method combines timely root pruning and potting, matrix preparation, nutrient supply and scientific management and protection of an LED light source system, so as to solve the problem that the ornamental dendrobium plants will be damaged after flowering. Serious recession, lower resistance, lower flowering quality in the following year, and even the introduction of plant death, etc., make the pseudobulbs of the decayed plants thick, the leaves are flat and shiny, and the scientific management and protection of the LED light source system can make the stems of the plants strong and resistant, and leaves The small flowers are gorgeous, the flowering characteristics are good, and the quality is stable, which provides new technologies and methods for long-term preservation of ornamental dendrobium breeding parent materials, prolonging the service life of seedlings, and reducing production costs.

Description

Rejuvenation method for ornamental dendrobium plants

Technical Field

The invention relates to the field of plant cultivation, in particular to a rejuvenation method for ornamental dendrobium plants.

Background

Dendrobii orchid is a general name of plants in the genus of dendrobii (DendorobiumSw) in the family of Orchidaceae, belongs to perennial epiphytic herbaceous plants, has bright color, rich color collection, long flowering phase and wide application, is popular with the public, has an important position in the international orchid market, and is one of four ornamental orchards. The dendrobium nobile lindl can be divided into spring dendrobium nobile and autumn dendrobium nobile according to different flowering time, the natural flowering phase of the spring dendrobium nobile is generally 3-5 months, and the natural flowering phase of the autumn dendrobium nobile is mainly 8-12 months. The ornamental dendrobium inflorescence is extracted from internodes of the middle upper part or leaf axils at the top end, 10-25 flowers of a single pseudobulb are counted, 25-40 flowers of some kinds of single inflorescences are counted, the flower quantity is extremely large, the flowering period of a single spring dendrobium plant is 10-30 days, and the flowering period of a single autumn dendrobium plant is 45-60 days. The inventor finds that due to the fact that the ornamental dendrobium has large flower quantity, long flowering period and large nutrient consumption, after a plant blooms, pseudo bulbs shrink, leaf color turns yellow, resistance is poor, the flowering quality of the next year is affected, even the plant is declined and dies, the problems that the service life of the ornamental dendrobium seedling is shortened, breeding parent materials are lost and the like are caused, and the sustainable development of ornamental dendrobium breeding and industry is severely restricted.

Disclosure of Invention

The invention aims to provide a rejuvenation method of an ornamental dendrobium plant, aiming at the defects of the prior art, and solving the problems of serious plant decline, reduced resistance, reduced flowering quality in the next year, even plant death and the like in the background technology after the ornamental dendrobium blooms by combining timely root repairing and pot changing, matrix preparation, nutrition supply and scientific management and protection of an LED light source system.

In order to achieve the purpose, the invention provides the following technical scheme:

a rejuvenation method of ornamental dendrobium plants comprises the following steps:

(1) repairing roots and changing basins; and (3) changing the pot of the ornamental dendrobium plant which decays after blooming every 4-9 months, removing the root matrix, cutting the old root with softened texture from the base part, soaking the plant in 800 times of solution of 75% chlorothalonil wettable powder for 3-5 minutes, draining water, and planting the plant in a tile pot or a breathable plastic pot with the size suitable for the plant.

(2) Preparing a matrix: cobblestones, pine barks, sphagna and sheep manure are mixed to serve as a culture medium, the diameter of the culture medium is 1-5 cm, the length of the culture medium is 8-10 cm, and the proportion is 3: 3: 3: 1, ensuring the ventilation of the root system, keeping proper moisture of the substrate and continuously releasing slow-acting nutrients.

(3) And (3) fertilizing on leaf surfaces: and after the pot is changed for about 20 days, after the bud of the ornamental dendrobium pseudobulb is extracted, spraying a liquid carbon-containing compound fertilizer and a balance compound fertilizer on the leaf surface in the vegetative growth period, alternately applying the liquid carbon-containing compound fertilizer and the balance compound fertilizer, wherein the fertilizer application concentration is 0.1-0.2%, and spraying the fertilizer once every 10 days until the terminal bud is capped, and stopping the growth of the plant. The liquid carbon-containing compound fertilizer and the balanced compound fertilizer contain nutrient elements such as organic carbon, organic matters, fulvic acid, major elements, trace elements and the like, can meet the nutrient requirement of plants in the vegetative growth period, and ensure that the pseudobulb is thick and full, the leaves are flat and glossy, and the resistance is increased.

(4) Supplying fertilizer to roots: pulverizing sheep manure into powder with pulverizer, adding 0.1% KH into the powder with plastic bucket or tile jar device₂PO₄And (3) soaking and fermenting the solution for 2-3 months, wherein the sheep manure is immersed in the solution and is 5cm higher than the plane. And (3) broadcasting the fermented sheep manure organic fertilizer in 1-2 g per pot when the ornamental dendrobium enters the reproductive growth period, so that the requirement of P, K on a large amount of organic matters in the period is met, and the flowering quality is improved.

(5) Daily management and protection: and 3 days after transplanting, spraying 800 times of solution of 75% thiophanate methyl wettable powder on the leaf surface for 1 time to prevent diseases, and after new buds grow, performing targeted control according to insect pest conditions. And (3) watering thoroughly after 2 weeks of transplantation, watering according to the weather conditions after one month, watering for 1 time in dry weather 2-3 days, watering for 1 time in cloudy day 5-7 days, and not watering in rainy day.

(6) Scientific management and protection of an LED light source system: at 0.72m²As basic units, 2 lamp holders are arranged at the position, 30-40 cm away from the top end of the dendrobium plant, of the center of each basic unit, 1 LED light source lamp bar is arranged on each lamp holder, and in the vegetative growth period, the LED light sources are turned on to illuminate and supplement light for 4 hours in the period of 20: 00-24: 00 every day.

As a further scheme of the invention: the basin is replaced in the step (1), the temperature is 26-33 ℃, and the extraction of new buds is easily induced; the height of the pot-changed ornamental dendrobium is 12-30 cm, the number of pseudo-bulbs is 3-5, the height of a tile pot or a plastic pot is 8-10 cm, and the diameter of the pot is 9-12 cm.

As a further scheme of the invention: the diameter of cobblestone and pine bark of the culture medium in the step (2) is 2-5 cm, the diameter of sheep manure is 1-1.5 cm, and the length of water moss is 8-10 cm. Before the sheep manure and the pine bark are used, 2000 times of solution of 25g/L deltamethrin emulsifiable solution and 800 times of solution of potassium permanganate are respectively used for thoroughly pouring and stirring the materials evenly, and the materials are piled and retted for 2-3 months for later use, so that the plant diseases and insect pests and the hardening of the matrix are reduced, the growth requirement of the ornamental dendrobium is met, and the service life of the matrix is prolonged.

As a further scheme of the invention: in the fertilizing method in the step (3), in the vegetative growth period of plants, the high-nitrogen compound fertilizer is sprayed twice, then the balanced compound fertilizer is sprayed once and the liquid carbon-containing compound fertilizer is sprayed once, and the high-nitrogen compound fertilizer, the balanced compound fertilizer and the liquid carbon-containing compound fertilizer are alternately applied to promote the rapid growth of leaves and pseudo bulbs.

As a further scheme of the invention: the liquid carbon-containing compound fertilizer prepared in the step (4) comprises 302g/L of organic matters, 175g/L of organic carbon, 220g/L of fulvic acid, 254g/L of macroelements, 135.7g/L of total nitrogen (N), and phosphorus (P)₂O₅Calculated as K) content of 24.8g/L, potassium (calculated as K)₂Calculated by O) content of 93.6g/L, trace element content of 4g/L, copper (Cu) content of 0.2g/L, iron (Fe) content of 0.7g/L, zinc (Zn) content of 1.7g/L and boron (B) content of 1.7 g/L; flower amount, high nitrogen compound fertilizer N: p: k is 30:10:10 in mass ratio, and balanced compound fertilizer N: p: the mass ratio of K is 20:20: 20.

As a further scheme of the invention: the step (5) mainly prevents and treats insect pests, the snail prevention method is to spread 600g of metaldehyde granules with concentration of 60% per mu on the cultivation field and the periphery; spraying 3000 times of liquid of 10% imidacloprid wettable powder to plant by aphid; spraying 1000 times of liquid of 25% buprofezin wettable powder to the scale insects; the red spider is sprayed with 2000 times of solution of 73% propargite missible oil to plants.

As a further scheme of the invention: the LED light source lamp strip in the step (6) is red, blue or white lightThe light intensity ratio of the mixed color light bar is 7:1:1, wherein the red wavelength is 630-660 NM, the blue wavelength is 435-450 NM, the white color temperature value is 6500K, and the photosynthetic photon flux density of the LED light source light bar is 47.1umol/m²s。

Compared with the prior art, the invention has the beneficial effects that:

(1) the cobblestone, the pine bark, the sphagna and the sheep manure are used as the culture medium and are mixed according to a proper proportion, so that the air permeability is good, and the water retention effect is good; the sheep manure granular fertilizer not only serves as a substrate, but also serves as a slow-release fertilizer to release nutrients to play a dual role; the sheep manure and the pine bark base are treated by the bactericide and the insecticide, so that the breeding of plant diseases and insect pests is not easy, the hardening of the base is reduced, the service life of the base is prolonged, the absorption of plants to nutrients is promoted, the root system of the plants is developed, and the plants grow robustly.

(2) The invention adopts liquid carbon-containing compound fertilizer with special components, high-nitrogen compound fertilizer and balanced compound fertilizer to be alternately sprayed in the vegetative growth period, and KH is used in the reproductive growth period₂PO₄The sheep manure organic fertilizer prepared by soaking and fermenting the sheep manure powder in the solution is applied as a slow-release fertilizer, beneficial nutrient components in the fertilizer in different growth periods supplement nutrients consumed by flowering of ornamental dendrobium plants in time, so that the decayed plants are remarkably recovered, and the flowering quality of the next year is ensured.

(3) The method for rejuvenating the decaying plant after the flowering of the ornamental dendrobium is developed by timely repairing roots and changing pots, selecting proper matrix proportion and carrying out matrix treatment, and combining application of special nutrient fertilizers in different growth periods and scientific management and protection of an LED light source system, so that the pseudo bulbs of the decaying plant are thick and strong, the leaf surface is flat and glossy, the scientific management and protection of the LED light source system can ensure that the stem of the plant is thick and strong and has strong resistance, the small leaves are bright and beautiful, the flowering character is good, the quality is stable, and a new technology and a new method are provided for long-term storage of parent materials for breeding of the ornamental dendrobium, prolonging the service life of seedlings and reducing the production cost.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

(1) Repairing roots and changing basins; in 8 months, the air temperature is 26-33 ℃, the plant height of the dendrobium devoninum who decays after flowering is 12-30 cm, the number of false bulbs is 3-5, the root matrix is removed, old roots with softened texture are cut off from the base, the plant is soaked in 800 times of 75% chlorothalonil wettable powder for 3-5 minutes, the plant is planted in a tile basin or a breathable plastic basin with the size suitable for the plant after water is drained, the basin height is 8-10 cm, and the caliber is 9-12 cm.

(2) Preparing a matrix: cobblestones, pine barks, sphagna and sheep manure are mixed to serve as a culture medium, the diameter of the culture medium is 1-5 cm, and the proportion is 3: 3: 3: 1, wherein the diameters of cobblestone and pine bark are 2-5 cm, the diameter of sheep manure is 1-1.5 cm, and the length of water moss is 8-10 cm; before the sheep manure and the pine bark are used, respectively using 2000 times of 25g/L deltamethrin emulsifiable solution and 800 times of potassium permanganate solution to thoroughly mix, and composting for 2-3 months for later use.

(3) And (3) fertilizing on leaf surfaces: and after the pot is changed for about 20 days, the dendrobium candidum pseudo bulb is sprayed with the fertilizer to extract new buds, the high-nitrogen compound fertilizer is sprayed on the leaf surface for 2 times, then the balanced compound fertilizer is sprayed for 1 time, and the liquid carbon-containing compound fertilizer is sprayed for 1 time in the vegetative growth period, the three are alternately applied, the fertilizer application concentration is 0.1-0.2%, the spraying is carried out once every 10 days until the top buds are capped, and the plant height stops growing. The content of each component of the liquid carbon-containing compound fertilizer is 302g/L of organic matter, and the content of organic carbon is

175g/L, the fulvic acid content is 220g/L, the macroelement content is 254g/L, and the total nitrogen (N) content is

135.7g/L, phosphorus (as P)₂O₅Calculated as K) content of 24.8g/L, potassium (calculated as K)₂Calculated by O) content of 93.6g/L, trace element content of 4g/L, copper (Cu) content of 0.2g/L, iron (Fe) content of 0.7g/L and zinc (Zn) content of 0.2g/L

1.7g/L, boron (B) content 1.7 g/L; balancing compound fertilizer N: p: the mass ratio of K is 20:20: 20.

(4) supplying fertilizer to roots: use sheep manurePulverizing into powder with pulverizer, adding 0.1% KH into the powder with plastic bucket or tile cylinder device₂PO₄And (3) soaking and fermenting the solution for 2-3 months, wherein the solution is used for immersing sheep manure and is 5cm higher than the plane. And (3) when the ornamental dendrobium enters the reproductive growth period, spreading the fermented sheep manure organic fertilizer in the vicinity of the plant root system, wherein 1-2 g of the organic fertilizer is applied in each pot.

(5) Daily management and protection: and 3 days after transplanting, spraying 800 times of solution of 75% thiophanate methyl wettable powder on the leaf surface for 1 time to prevent diseases, and after new buds grow, performing targeted control according to insect pest conditions. The method for preventing and controlling the snails mainly comprises the steps of broadcasting 600g of 60% metaldehyde particles per mu of cultivation field and periphery; spraying 3000 times of liquid of 10% imidacloprid wettable powder to plant by aphid; spraying 1000 times of liquid of 25% buprofezin wettable powder to the scale insects; the red spider is sprayed with 2000 times of solution of 73% propargite missible oil to plants. And (3) watering thoroughly after 2 weeks of transplantation, watering according to the weather conditions after one month, watering for 1 time in dry weather 2-3 days, watering for 1 time in cloudy day 5-7 days, and not watering in rainy day.

Reference is made to comparative example 1 for example 1

Method of comparative example 1: after the dendrobium splash-proof blooms, the plants are not applied with liquid carbon-containing compound fertilizer and sheep manure organic fertilizer, only applied with balanced compound fertilizer and high nitrogen fertilizer, pine bark is used as a culture medium, and other daily management and maintenance are carried out as usual.

Compared with the comparative example 1, the method of the example 1 has a remarkable effect on the rejuvenation effect of the dendrobium nobile-dendrobium loddigesii plant, the matrix mildew rate and the plant disease susceptibility are zero, the plant is strong, the pseudobulb thickness reaches 1.70cm, the number of new buds is large, the flower is large, the number of flowers is large, more than 10 flowers are obtained, and the flowering rate of the next-year plant is high and reaches 98 percent (see table 1).

TABLE 1 Effect of the method of example 1 on the rejuvenation of plants of P-lotioned dendrobe

Example 2

(1) Repairing roots and changing basins; in 8 months, the temperature is 26-33 ℃, the greening dendrobium which decays after flowering is taken off from a pot, the plant height is 12-30 cm, the number of false bulbs is 3-5, root matrixes are removed, old roots with softened texture are cut off from a base part, the plant is soaked in 800 times of 75% chlorothalonil wettable powder for 3-5 minutes, the plant is planted in a tile pot or a breathable plastic pot which is suitable for the plant size after moisture is drained, the pot height is 8-10 cm, and the caliber is 9-12 cm.

(3) And (3) fertilizing on leaf surfaces: after the pot is changed for about 20 days, the bud of the dendrobium candidum pseudo bulb is extracted, a high-nitrogen compound fertilizer is sprayed on the leaf surface of the dendrobium candidum for 2 times in the vegetative growth period, then a balanced compound fertilizer is sprayed for 1 time, and a liquid carbon-containing compound fertilizer is sprayed for 1 time, wherein the high-nitrogen compound fertilizer, the balanced compound fertilizer and the liquid carbon-containing compound fertilizer are alternately applied, the fertilizer application concentration is 0.1-0.2%, the spraying is carried out once every 10 days until the top bud is sealed, and the plant height stops growing. The liquid carbon-containing compound fertilizer comprises 302g/L of organic matters, 175g/L of organic carbon, 220g/L of fulvic acid, 254g/L of macroelements, 135.7g/L of total nitrogen (N) and phosphorus (P)₂O₅Calculated as K) content of 24.8g/L, potassium (calculated as K)₂Calculated by O) content of 93.6g/L, trace element content of 4g/L, copper (Cu) content of 0.2g/L, iron (Fe) content of 0.7g/L, zinc (Zn) content of 1.7g/L and boron (B) content of 1.7 g/L; balancing compound fertilizer N: p: the mass ratio of K is 20:20: 20.

(4) supplying fertilizer to roots: pulverizing sheep manure into powder with pulverizer, adding 0.1% KH into the powder with plastic bucket or tile jar device₂PO₄Soaking and fermenting the sheep manure in the solution for 2-3 months, wherein the solution is used for immersing the sheep manure and raising the sheep manure to be flatThe area is 5 cm. And (3) when the ornamental dendrobium enters the reproductive growth period, spreading the fermented sheep manure organic fertilizer in the vicinity of the plant root system, wherein 1-2 g of the organic fertilizer is applied in each pot.

Reference is made to comparative example 2 for example 2

Method of comparative example 2: after the dendrobium candidum blooms, liquid carbon-containing compound fertilizer and sheep manure organic fertilizer are not applied to plants, only balanced compound fertilizer is applied, pine bark is used as a culture medium, and other daily management and care are carried out as usual.

Example 2 compared with comparative example 2, the method of example 2 significantly affected dendrobium nobile-chlorofluorose plants, with very low matrix mildew rate and plant susceptibility, robust plants, pseudobulb stem up to 1.42cm thick, large number of new buds, large flowers, very large number of flowers, up to more than 28 flowers, and high flowering rate of the next year up to 95% (see table 2).

TABLE 2 Effect of the method of example 2 on the rejuvenation of Dendrobium loddigesii plants

According to the rejuvenation method for the ornamental dendrobium plants, after the flowering period of the ornamental dendrobium, roots and pots are timely repaired and replaced, the appropriate substrate proportion is adopted, the substrate is effectively treated, the liquid carbon-containing compound fertilizer and the sheep manure organic fertilizer are applied, the scientific fertilization configuration and the daily management and protection are added, the nutrients consumed by the plants are timely supplemented, the plants after flowering are kept healthy and strong, the false-scaled stems are as thick as more than 1.4cm, the flowering amount is large, the flowering rate is high and reaches more than 95%, the substrate mildew rate and the plant disease susceptibility rate are low, good environmental conditions are created for the growth of the plants, the service life of seedlings is prolonged, the long-term storage of breeding parent materials is ensured, and a new method is provided for the sustainable development of the ornamental dendrobium industry.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. a rejuvenation method for ornamental dendrobium plants, is characterized in that, comprises the following steps:

(1) Prune roots and change pots; from April to September every year, change pots for ornamental dendrobium plants that have declined after flowering, remove the root matrix, cut off the soft old roots from the base, and use 75% chlorothalonil WP 800 Soak the plants in the double liquid for 3 to 5 minutes, drain the water and plant them in a tile pot or a breathable plastic pot suitable for the size of the plant;

(2) Substrate preparation: The mixture of cobblestone, pine bark, water moss and sheep manure is used as the cultivation substrate. The diameter of the substrate is 1-5cm, the length is 8-10cm, and the ratio is 3:3:3:1 to ensure the ventilation of the root system. , sustained release of slow-acting nutrients;

(3) Foliar fertilization: After about 20 days of repotting, after the pseudobulbs of ornamental dendrobium have taken out new buds, in the vegetative growth period of the plant, spray high-nitrogen compound fertilizer twice, then spray balanced compound fertilizer once and liquid carbon-containing compound fertilizer once , in order to promote the rapid growth of leaves and pseudobulbs, the fertilization concentration is 0.1-0.2%, and spray every 10d until the top buds are capped and the plants stop growing; liquid carbon-containing compound fertilizers and balanced compound fertilizers contain organic carbon, fulvic acid, A large amount of elements and trace elements can meet the nutrient needs of plants in the vegetative growth period, make the pseudobulbs thick and plump, the leaves are flat and shiny, and the resistance is increased;

(4) Fertilizer supply for the roots: crush the sheep manure into powder with a pulverizer, add 0.1% KH ₂ PO ₄ solution to a plastic bucket or a tile tank device, soak and ferment for 2 to 3 months, the amount of solution immerses the sheep manure and rises above the plane 5cm; Ornamental Dendrobium enters the reproductive growth period, and fermented sheep manure organic fertilizer is applied, 1-2g per pot, to meet the large demand for P, K and organic matter in this period, and improve the flowering quality;

(5) Daily management and protection: 3 days after transplanting, spray the foliage with 800 times of 75% thiophanate-methyl wettable powder to prevent diseases. Water thoroughly after a week, water according to weather conditions after a month, water once every 2 to 3 days in dry weather, once in 5 to 7 days in cloudy days, and do not water in rainy days;

(6) Scientific management and protection of LED light source system: take 0.72m ² as the basic unit, install 2 lamp sockets at a height of 30-40 cm from the top of the dendrobium plant from the center of each basic unit, and install 1 LED light source light bar for each lamp socket , in the vegetative growth period, from 20:00 to 24:00 every day, turn on the LED light source to illuminate the dendrobium plants for 4 hours;

Wherein, in the liquid carbon-containing compound fertilizer of the step (3), the content of each component is that the content of organic carbon is 175g/L, the content of fulvic acid is 220g/L, the content of macroelements is 254g/L, and the content of trace elements is 4g/L. L; high nitrogen compound fertilizer N:P:K mass ratio is 30:10:10, balanced compound fertilizer N:P:K mass ratio is 20:20:20.

2. the rejuvenation method of ornamental dendrobium plants according to claim 1, is characterized in that, described step (1) changes pots, and temperature is 26～33 ℃, and is easy to induce sprouts to draw out; The ornamental dendrobium plant height of changing pots is 12 ~30cm, the number of pseudobulbs is 3~5, and the height of the tile pot or plastic pot is 8~10cm, and the diameter is 9~12cm.

3. the rejuvenation method of ornamental dendrobium plants according to claim 1, is characterized in that, described step (2) cultivation substrate, cobblestone and pine bark diameter are 2～5cm, sheep dung diameter is 1～1.5cm, water The length of the moss is 8-10cm; before the sheep manure and pine bark are used, 25g/L deltamethrin EC 2000 times and potassium permanganate 800 times are irrigated and stirred evenly, and the compost is used for 2 to 3 months. In order to reduce pests and diseases and matrix hardening, meet the growth needs of ornamental dendrobium, and prolong the service life of the matrix.

4. the rejuvenation method of ornamental dendrobium plants according to claim 1, is characterized in that, described step (5), the snail control method is that every mu uses 60% metaldehyde particle 600g to spread the cultivation site and around; Plants were sprayed with 10% imidacloprid WP 3000 times; scale insects were sprayed with 25% thiazide WP 1000 times; red spiders were sprayed with 73% propargite EC 2000 times.

5. the rejuvenation method of ornamental dendrobium plants according to claim 1, is characterized in that, the LED light source light bar in described step (6) is red, blue, white light mixed color light bar, and its illuminance ratio is 7:1: 1. The wavelength of red light is 630-660NM, the wavelength of blue light is 435-450NM, the color temperature of white light is 6500K, and the photosynthetic photon flux density of LED light source strip is 47.1umol/m ² s.