Nitrogen cycle collection device

Abstract

The utility model discloses a nitrogen circulating and collecting device. Wherein the nitrous oxide monitoring chamber is hermetically mounted above the plant growth chamber; a space is defined between the nitrous oxide monitoring chamber and the plant growth chamber, a gas inlet and a gas outlet are formed in the nitrous oxide monitoring chamber, and the gas outlet is sequentially connected with a nitrous oxide sensor, a gas pump and the gas inlet through a gas pipeline to form a loop; and the lower end of the nitrous oxide monitoring chamber is integrally and fixedly connected with an annular fitting step. According to the utility model, the interference of man-made disturbance in the acquisition process can be reduced, and the accuracy and reliability of monitoring data are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of sample preparation for testing, concretely is nitrogen circulation collection device. BACKGROUND

[0002] Nitrogen cycle is one of the important processes of nutrient cycle in ecological system. Accurate and rapid in-situ continuous dynamic monitoring of soil nitrous oxide emission is the basis for comprehensively understanding the nitrogen cycle of ecological system and the key to efficient and scientific management of the nitrogen cycle of ecological system. At present, the monitoring system and means of the nitrogen cycle of ecological system mainly have the following defects and problems: the monitoring of soil nitrous oxide emission is complicated and inefficient; the traditional monitoring method can only provide discrete monitoring data points and lacks the monitoring capability for the whole process.

[0003] Therefore, a collection system for soil nitrous oxide emission after nitrogen nutrient leaching is needed to realize continuous and efficient collection of nitrous oxide gas, and direct connection with precipitation scenarios is also realized. SUMMARY

[0004] In view of the problems in the background art, the utility model provides a nitrogen cycle collection device, and the technical scheme comprises: a plant growth chamber, a nitrous oxide monitoring chamber, an air pump, a nitrous oxide sensor and a gas pipeline, wherein the nitrous oxide monitoring chamber is sealingly installed above the plant growth chamber; a space is formed between the nitrous oxide monitoring chamber and the plant growth chamber, the nitrous oxide monitoring chamber is provided with an air inlet and an air outlet, the air outlet is connected with the nitrous oxide sensor, the air pump and the air inlet in sequence through the gas pipeline to form a loop, and the lower end of the nitrous oxide monitoring chamber is integrally and fixedly provided with a ring-shaped fitting ladder.

[0005] The ring-shaped fitting ladder is provided with a sealing portion on the circumferential surface.

[0006] The air inlet is formed in the side wall of the nitrous oxide monitoring chamber, and an inlet protruding ring-shaped portion is arranged outside the air inlet.

[0007] The air outlet is formed in the side wall of the nitrous oxide monitoring chamber, and an air outlet protruding ring-shaped portion is arranged outside the air outlet.

[0008] The outer periphery of the upper part of the plant growth chamber is fixed with the lower inner side of the precipitation basin fixing plate, the upper part of the precipitation basin fixing plate is fixed with the simulated precipitation basin, and the lower plate of the simulated precipitation basin is provided with a drip head group.

[0009] The drip heads in the drip head group are uniformly distributed directly above the plant growth chamber.

[0010] The precipitation basin fixing plate has an arc shape matched with the outer periphery size of the simulated precipitation basin.

[0011] The lower end surface of the plant growth chamber is provided with a drainage hole.

[0012] The shape and size of the outer periphery of the ring-shaped fitted steps are the same as the shape and size of the inner side of the upper end of the plant growth chamber.

[0013] The beneficial effects of this invention are: it enables the monitoring of the nitrogen cycle in ecosystems under different precipitation scenarios, improving the understanding of the nitrogen cycle process caused by climate change; and it reduces human disturbance during the data collection process, improving the accuracy and reliability of the monitoring data. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the nitrogen recycling collection device of this utility model;

[0015] Figure 2 This is a longitudinal sectional view of an embodiment of the present utility model.

[0016] Among them: 1-plant growth chamber, 11-drainage hole, 2-nitrous oxide monitoring chamber, 21-ring-shaped fitted ladder, 22-air inlet, 221-inlet protruding ring-shaped part, 23-air outlet, 231-outlet protruding ring-shaped part, 3-air pump, 4-nitrous oxide sensor, 5-gas pipeline, 6-simulated precipitation basin, 61-precipitation basin fixing plate, 62-dripper assembly. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] like Figure 1 The embodiment of the present invention shown includes: a plant growth chamber 1, a nitrous oxide monitoring chamber 2, an air pump 3, a nitrous oxide sensor 4, and a gas pipeline 5. The nitrous oxide monitoring chamber 2 is sealed and installed above the plant growth chamber 1. The plant growth chamber 1 is filled with soil, and plants are planted in the soil. The nitrous oxide monitoring chamber 2 and the plant growth chamber 1 form a relatively enclosed gas space. The nitrous oxide monitoring chamber 2 has an air inlet 22 and an air outlet 23. The air outlet 23 is connected to the nitrous oxide sensor 4, the air pump 3, and the air inlet 22 in sequence through the gas pipeline 5 to form a loop, thereby collecting data on the nitrogen cycle process of the ecosystem through the nitrous oxide sensor 4.

[0019] The lower end of the nitrous oxide monitoring chamber 2 is integrally fixed with an annular step 21; the shape and size of the outer periphery of the annular step 21 are the same as the shape and size of the inner side of the upper end of the plant growth chamber 1, thereby better isolating external air and gases generated by the plant growth chamber 1.

[0020] In this embodiment, a sealing part is provided on the circumferential side of the annular bonding step 21. The sealing part is achieved by sealing tape or sealing ring (a groove needs to be cut on the circumferential surface of the annular bonding step 21).

[0021] In the embodiment, the gas inlet 22 is opened on the side wall of the nitrous oxide monitoring chamber 2, and an inlet protruding annular part 221 is arranged outside the gas inlet 22 to extend the gas inlet 22 for facilitating installation of the gas pipeline 5; the gas outlet 23 is opened on the side wall of the nitrous oxide monitoring chamber 2, and a gas outlet protruding annular part 231 is arranged outside the gas outlet 23 to extend the gas outlet 23 for facilitating installation of the gas pipeline 5.

[0022] The outer peripheral upper part of the plant growth chamber 1 is fixed to the inner side of the lower part of the precipitation basin fixing plate 61, the upper part of the precipitation basin fixing plate 61 is fixed to the simulated precipitation basin 6, the lower plate of the simulated precipitation basin 6 is provided with the dripper group 62, and the drippers in the dripper group 62 are uniformly distributed above the plant growth chamber 1; the combination of the simulated precipitation basin 6 and the dripper group 62 can simulate different precipitation time and flow (change the flow by replacing the drippers in the dripper group) according to requirements.

[0023] In the embodiment, the outer shape of the precipitation basin fixing plate 61 is an arc shape matching the outer peripheral size of the simulated precipitation basin 6.

[0024] The lower end surface of the plant growth chamber 1 is provided with a drainage hole 11, and the excess water is drained through the drainage hole 11 when the simulated precipitation basin 6 simulates precipitation.

[0025] In operation, the gas pipeline 5 is sequentially connected to the gas outlet 23, the nitrous oxide sensor 4, the gas pump 3 and the gas inlet 22, the nitrous oxide monitoring chamber 2 is covered on the plant growth chamber 1, and the data collected by the nitrous oxide sensor 4 is recorded in a period of time; the nitrous oxide emission and the nitrogen nutrient leaching process of the ecological system are monitored in real time, and the continuous monitoring of the nitrogen cycle process of the ecological system is realized.

[0026] When the nitrogen cycle of the ecological system needs to be changed, the nitrous oxide monitoring chamber 2 is opened and placed aside, water is added to the simulated precipitation basin 6, and the precipitation is simulated through the dripper group 62; the soil in the plant growth chamber 1 is planted to the time when watering and growth are needed to collect data, and then the nitrous oxide monitoring chamber 2 is covered again to collect data of the nitrous oxide sensor 4; subsequently, the collected data is analyzed and processed to obtain comprehensive monitoring results of different paths of the nitrogen cycle of the ecological system under different precipitation scenarios.

Claims

1. A nitrogen recycling and collection device, characterized in that, include: The plant growth chamber (1), nitrous oxide monitoring chamber (2), air pump (3), nitrous oxide sensor (4) and gas pipeline (5) are sealed and installed above the plant growth chamber (1). The nitrous oxide monitoring chamber (2) and the plant growth chamber (1) form a space. The nitrous oxide monitoring chamber (2) has an air inlet (22) and an air outlet (23). The air outlet (23) is connected to the nitrous oxide sensor (4), air pump (3) and air inlet (22) in sequence through the gas pipeline (5) to form a loop. The lower end of the nitrous oxide monitoring chamber (2) is integrally fixed with an annular fitting step (21).

2. The nitrogen recycling and collection device according to claim 1, characterized in that, The annular step (21) has a sealing part on its circumferential side.

3. The nitrogen recycling and collection device according to claim 1, characterized in that, The air inlet (22) is located on the side wall of the nitrous oxide monitoring chamber (2), and an inlet protruding annular part (221) is provided on the outside of the air inlet (22).

4. The nitrogen recycling and collection device according to claim 1, characterized in that, The outlet (23) is located on the side wall of the nitrous oxide monitoring chamber (2), and an outlet protruding annular part (231) is provided on the outside of the outlet (23).

5. The nitrogen recycling and collection device according to claim 1, characterized in that, The upper part of the outer periphery of the plant growth chamber (1) is fixed to the lower inner side of the rain basin fixing plate (61), the upper part of the rain basin fixing plate (61) is fixed to the simulated rain basin (6), and the lower plate of the simulated rain basin (6) is provided with a dripper group (62).

6. The nitrogen recycling and collection device according to claim 5, characterized in that, The drippers in the dripper group (62) are evenly distributed above the plant growth chamber (1).

7. The nitrogen recycling and collection device according to claim 5, characterized in that, The shape of the precipitation basin fixing plate (61) is an arc that matches the outer perimeter of the simulated precipitation basin (6).

8. The nitrogen recycling and collection device according to claim 1, characterized in that, The plant growth chamber (1) has a drainage hole (11) on its lower end face.

9. The nitrogen recycling and collection device according to claim 1, characterized in that, The shape and size of the outer periphery of the annular fitted step (21) are the same as the shape and size of the inner side of the upper end of the plant growth chamber (1).

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