CN113447635B - A device for measuring greenhouse gas release rates at different depths in potted soil - Google Patents

Abstract

The invention discloses a potted soil greenhouse gas release rate measuring device with different depths, which comprises: the flowerpot is provided with transverse bottle holes and probe holes at intervals along the depth direction; a transverse bottle mounted in the transverse bottle aperture; the body of the transverse bottle is positioned in the flowerpot, the bottle mouth is positioned outside the flowerpot, the body is placed in soil when the flowerpot is covered with soil, and the wall of the bottle is contacted with surrounding soil; the circumferential surface of the bottle body positioned in the flowerpot is provided with ventilation holes; the water absorbing piece is arranged in the body of the transverse bottle; and the temperature and humidity probe is inserted into the probe hole and used for measuring the temperature and humidity of soil in the flowerpot. Through the mode of opening the hole on the flowerpot wall, the problem of survey deep soil greenhouse gas release under the condition of hardly disturbing soil is solved, simultaneously through the design of the sponge that absorbs water, ingenious solution potted plant soil sample and deep soil sample's problem. Is very beneficial to the research and experiment of the release rule of the greenhouse gases of the soil at different soil depths and the occurrence mechanism thereof.

Description

A device for measuring greenhouse gas release rates at different depths of potted soil

Technical field

The invention relates to a soil gas collection device for potted soil experiments, and in particular to a device for measuring greenhouse gas release rates at different depths of potted soil.

Background technique

In the context of global warming, research on the release of greenhouse gases is crucial for assessing and predicting future global climate change trends. As the most important source of greenhouse gases, soil's release rate of greenhouse gases (carbon dioxide, methane, nitrous oxide, etc.) has always been a hot research issue. There are many studies on greenhouse gas collection devices on the soil surface. However, due to the difficulty of actual operation in the soil and the disturbance of the three phases of soil solid, liquid and gas, there have always been huge technical difficulties in measuring the greenhouse gas release rate of soil at different depths. In addition, researchers When explaining the mechanism of greenhouse gas release rate from soil, it is necessary to monitor soil temperature, soil moisture, soil physical and chemical properties, soil microbial community and microbial biomass and other indicators at the corresponding soil depth. The traditional soil sampling method is to directly remove the soil. This method will inevitably disturb the soil environment drastically, which will not only affect the current sampling results, but also long-term high-frequency soil removal may significantly reduce the potting soil matrix content. That is to say, there is a lack of a device that can not only measure the greenhouse gas release rate of soil at different depths of potted plants, but also monitor physical, chemical and biological indicators of soil in the same layer.

Contents of the invention

The purpose of the present invention is to solve at least one technical problem existing in the above-mentioned background technology and provide a device for measuring greenhouse gas release rates at different depths of potted soil.

In order to achieve the above objects, the technical solution of the present invention is:

A device for measuring greenhouse gas release rates at different depths of potted soil, including:

The flower pot is provided with horizontal bottle holes and probe holes at intervals along its depth direction;

A horizontal bottle, which is installed in the hole of the horizontal bottle; the bottle body of the horizontal bottle is located in the flower pot, and the bottle mouth is located outside the flower pot. When the flower pot is covered with soil, the bottle body is placed in the soil, and the bottle wall is in contact with the surrounding soil; The circumferential surface of the bottle located in the flower pot is provided with ventilation holes;

A water-absorbing member is arranged inside the body of the horizontal bottle;

Temperature and humidity probe, which is inserted into the probe hole and used to measure the soil temperature and humidity in the flower pot.

Further, the ventilation hole is a cone-shaped hole, thin on the outside and thick on the inside. The tip of the cone faces the outside of the horizontal bottle, and the round surface of the cone faces the inside of the horizontal bottle cavity.

Furthermore, the number of horizontal bottle holes and probe holes in the same depth direction is the same, and each layer is located on the same horizontal plane.

Further, the included angle between the horizontal bottle hole and the probe hole located on the same horizontal plane is 50-70°.

Further, the water-absorbing member is a sponge.

Further, rubber is sealed between the temperature and humidity probe and the probe hole.

Further, the body of the horizontal bottle is cylindrical, with a diameter of 3cm and a length of less than 10cm.

Further, the bottle mouth of the horizontal bottle is equipped with a light-tight outward-facing cover.

Further, the included angle between the horizontal bottle hole and the probe hole located on the same horizontal plane is 60°.

Further, the flowerpot is provided with horizontal bottle holes and probe holes at intervals of 10 cm from top to bottom along its depth direction.

Compared with the prior art, the beneficial effects of the present invention are:

By making holes in the wall of the flower pot, the problem of measuring greenhouse gas release in deep soil without disturbing the soil is solved. At the same time, through the design of absorbent sponges, the problem of potted soil sampling and deep soil sampling is cleverly solved. It can not only measure the greenhouse gas release rate of soil at different depths of potted plants, but also monitor the physical, chemical and biological indicators of soil in the same layer. It is very conducive to the conduct of research experiments on the release patterns and occurrence mechanisms of soil greenhouse gases at different soil depths.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a device for measuring greenhouse gas release rates at different depths of potted soil provided by an embodiment of the present invention;

Figure 2 is a cross-sectional view of Figure 1;

Figure 3 is a schematic diagram of the overall structure of the horizontal bottle;

Figure 4 is a partial schematic diagram of the horizontal bottle;

Figure 5 is a schematic diagram of the installation of the temperature and humidity probe;

In the picture: 1. Flowerpot; 2. Horizontal bottle; 3. Temperature and humidity probe; 21. Ventilation hole.

Detailed ways

Example:

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. Ground connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediary. It can be said to be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. The technical solution of the present invention will be further described below with reference to the accompanying drawings and examples.

Referring to Figures 1-5, the device for measuring greenhouse gas release rates at different depths of potted soil provided in this embodiment mainly includes a flower pot 1, a horizontal bottle 2, a water absorbing member, and a temperature and humidity probe 3.

Among them, the flowerpot 1 is provided with horizontal bottle holes and probe holes at intervals of 10cm from top to bottom along its depth direction. That is to say, the horizontal bottle holes and probe holes located on the same layer are located on the same layer. horizontal plane; the horizontal bottle 2 is correspondingly sealed and installed in the horizontal bottle hole. The bottle mouth is equipped with an opaque cover facing outward, and the bottle body is inside the flower pot. When covering the soil, the bottle body is placed in the soil. The wall is in close contact with the surrounding soil, so the bottle body needs a certain resistance to deformation. Ventilation holes 21 are left around the bottle body to maintain soil moisture and gas exchange between the horizontal bottle and the flower pot; preferably, the ventilation holes 21 It is a cone-shaped pore. The tip of the cone faces the outside of the horizontal bottle, and the round surface of the cone faces the inside of the horizontal bottle cavity. The design purpose of being thin on the outside and thick on the inside is to ensure that the pores are not blocked by the soil in the flower pot and further maintain the horizontal bottle. Exchange of water and gases with the soil in the flower pot.

Horizontal bottle 2 is preferably a cylindrical bottle with a diameter of 3cm, and the length of the horizontal bottle within the wall of the flowerpot is within 10cm. The purpose is to ensure that gas and water in the soil fully penetrate into the horizontal bottle, while reducing the impact on the growth of the soil and plant roots. , the bottle body is filled with water-absorbing parts of the same shape, specifically a sponge in this embodiment. The sponge is required to have strong water absorption, good toughness, and stable composition. In the experiment, the sponge was placed in the bottle body and the bottle cap was tightened. When sampling Take out the sponge and soak it in the same volume of deionized water. Squeeze and filter out the solution for measuring nutrients in the soil. After the sponge is removed, the remaining cavity in the horizontal bottle can be used to collect greenhouse gases in the corresponding soil layer and measure the work. ; After the measurement is completed, refill the pure sponge and tighten the bottle cap.

The temperature and humidity probe 3 is inserted into the probe hole and used to measure the soil temperature and humidity in the flower pot; in addition, in order to reduce the seepage of water and soil in the flower pot, a sealing rubber strip is provided in the probe hole. That is to say, there is a sealing rubber strip between the temperature and humidity probe and the probe hole. The horizontal sealing rubber strip is set at an angle of 50-70° with the diameter of the horizontal bottle (that is, the probe hole and the horizontal bottle The angle between the two holes is 50-70°), and in this example it is preferably 60°, and they should be set on the same horizontal plane on both the left and right sides. The main purpose is to facilitate the measurement of the soil temperature of the same layer of soil. Humidity, on the other hand, facilitates simultaneous measurement of greenhouse gases and soil temperature and humidity.

To sum up, this paper solves the problem of measuring greenhouse gas release in deep soil without disturbing the soil by making holes in the wall of the flower pot. At the same time, through the design of absorbent sponge, it cleverly solves the problem of potted soil sampling and The issue of deep soil sampling can not only measure the greenhouse gas release rate of soil at different depths of potted plants, but also monitor the physical, chemical and biological indicators of soil in the same layer. It is very conducive to the study of soil greenhouse gas release patterns and its occurrence mechanisms at different soil depths. Conduct of the experiment.

The above embodiments are only for illustrating the technical concepts and characteristics of the present invention. Their purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly. They cannot limit the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A potted-type soil different-depth greenhouse gas release rate measuring device, which is characterized by comprising:

the flowerpot is provided with transverse bottle holes and probe holes at intervals along the depth direction;

a transverse bottle mounted in the transverse bottle aperture; the body of the transverse bottle is positioned in the flowerpot, the bottle mouth is positioned outside the flowerpot, the body is placed in soil when the flowerpot is covered with soil, and the wall of the bottle is contacted with surrounding soil; the circumferential surface of the bottle body positioned in the flowerpot is provided with ventilation holes;

the water absorbing piece is arranged in the body of the transverse bottle;

the temperature and humidity probe is inserted into the probe hole and used for measuring the temperature and humidity of soil in the flowerpot;

the air vent is a conical hole, the outer part of the air vent is thin, the inner part of the air vent is thick, the tip of the cone faces the outside of the transverse bottle, and the cone faces the cavity of the transverse bottle;

the transverse bottle holes and the probe holes are arranged in the same depth direction in the same number, and each layer is positioned on the same horizontal plane;

the included angle between the transverse bottle hole and the probe hole which are positioned on the same horizontal plane is 50-70 degrees;

the water absorbing piece is a sponge;

the bottle body is filled with the water absorbing parts with the same shape,

placing the sponge into a bottle body, screwing a bottle cap, taking out the sponge during sampling, placing the sponge into deionized water with the same volume for soaking, squeezing and filtering out a solution for determining nutrients in soil, and after the sponge is removed, collecting greenhouse gases in a corresponding soil layer by using a residual cavity in a transverse bottle for determining work; and (5) refilling the pure sponge after the measurement is completed, and screwing the bottle cap.

2. The device for measuring the release rate of greenhouse gases at different depths in potting soil according to claim 1, wherein a rubber strip is sealed between the temperature and humidity probe and the probe hole.

3. The device for measuring the release rate of greenhouse gases in potting soil at different depths according to claim 1, wherein the body of the transverse bottle is cylindrical, has a diameter of 3cm and has a length of less than 10 cm.

4. A potted soil differential depth greenhouse gas release rate determining apparatus according to claim 1 or 3, wherein the mouth of the transverse bottle is provided with an opaque outward cap.

5. The device for measuring the release rate of greenhouse gases at different depths in potted soil according to claim 1, wherein the included angle between the transverse flask hole and the probe hole on the same horizontal plane is 60 °.

6. The device for measuring the release rate of greenhouse gases at different depths in potting soil according to claim 1, wherein the flowerpot is provided with transverse bottle holes and probe holes at intervals of 10cm from top to bottom in sequence along the depth direction.