CN110686942A - Farmland and lawn soil ammonia collection device that volatilizees - Google Patents
Farmland and lawn soil ammonia collection device that volatilizees Download PDFInfo
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- CN110686942A CN110686942A CN201910914837.XA CN201910914837A CN110686942A CN 110686942 A CN110686942 A CN 110686942A CN 201910914837 A CN201910914837 A CN 201910914837A CN 110686942 A CN110686942 A CN 110686942A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 48
- 239000002689 soil Substances 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000009833 condensation Methods 0.000 claims abstract description 5
- 230000005494 condensation Effects 0.000 claims abstract description 5
- 239000000969 carrier Substances 0.000 claims abstract description 3
- 238000005070 sampling Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 10
- 238000013461 design Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000004720 fertilization Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 nitrogen-containing compound Chemical class 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 230000007105 physical stamina Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2294—Sampling soil gases or the like
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Soil Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A farmland and lawn soil ammonia volatilization collection device relates to a soil ammonia volatilization collection device, which comprises an air inlet pipe, a first box body, a second box body, a cover, an air outlet pipe, an air collection bottle and a vacuum pump which are connected in sequence; the upper part and the lower part of the first box body are provided with openings, the second box body and the first box body form a seal by utilizing a liquid seal groove formed by a positioning ring, the second box body forms a seal by utilizing a flange and a cover, the second box body comprises a collecting device for collecting water drops formed by water vapor condensation, and the first box body and the second box body are provided with strip-shaped cards at positions 5-10 mm away from the upper part of the first box body and the second box body and are used as carriers of a beaker and a funnel. The device provided by the invention has the advantages that the internal environment of the device is close to the natural environment, the added water vapor collecting device can effectively reduce experimental errors, the air pressure of the device is ensured, the air flow and the flow rate of the air flow are controlled and adjusted, the device is used for collecting ammonia volatilization of soil of farmlands and lawns, the integration level is high, the process is simple, the cost is low, the operation is easy, the experimental cost is reduced, and the high precision of collection is realized.
Description
Technical Field
The invention relates to an agricultural soil ammonia volatilization and collection device, in particular to a farmland and lawn soil ammonia volatilization and collection device.
Background
Ammonia gas is a nitrogen-containing compound with the second content to nitrogen and nitrous oxide in the atmosphere and is also the most abundant alkaline trace gas, and ammonia gas pollution has many negative effects on air quality and ecological system health. Ammonia is an important atmospheric pollutant, and the increasing human activities have led to more and more ammonia entering the atmosphere and then returning to the earth surface through sedimentation, and the ammonia pollution is closely related to the global environmental problems of water eutrophication, algae outbreak, reduction of biodiversity, greenhouse effect and the like which are widely concerned at present. Agricultural production and garden maintenance activities are main sources of ammonia in the atmosphere, the emission amount of the ammonia accounts for 55-56% of the global ammonia emission, particularly, ammonia volatilization generated by chemical fertilizer application is an important way for ammonia to enter the atmosphere, and the ammonia emission is one of important ways for soil nitrogen loss, so that the research on ammonia emission of farmlands and lawns has important significance for preventing and treating environmental pollution and improving the agricultural production efficiency.
At present, the types of ammonia volatilization collection devices mainly comprise a sealing method, a ventilation method, a flow air extraction method and the like, devices applied by a plurality of methods have certain limitations, the collection precision is not high, and a good ammonia volatilization collection effect cannot be achieved, wherein a negative pressure extraction-boric acid absorption titration method is a good, simple and easy method, and research and development of an ammonia volatilization sampling device are a research hotspot. The sampling devices frequently adopted in the market are generally heavier, have poor integration level and poor application effect. Products with high automation degree are all foreign products, are expensive and are difficult to popularize and use in a large quantity. The method for collecting soil by inserting the closed cylinder into the soil is adopted in China, on one hand, air, moisture and nutrient flowing inside and outside the cylinder is blocked, the soil environment inside the cylinder is changed, the difference between the soil environment and the real natural environment is large, on the other hand, the requirement on the environment is relatively strict because the height of the existing device is not adjustable, only the ammonia volatilization of soil of dwarf plants or vegetation-free plants can be monitored, and the application range of the device is limited to a great extent. This device improves the ventilation effect on the basis of current device, carries out analysis and design collection device to the collection error of device inside, but the design is split, height-adjusting's device, from the true natural environment of each aspect simulation, forms nearly natural state, reaches the effect of high-efficient collection.
Disclosure of Invention
The invention aims to provide a farmland and lawn soil ammonia volatilization collecting device, which can achieve a near-natural environment condition in the device, can effectively reduce experimental errors by adding a water vapor collecting device, ensures the air pressure of the device, controls and adjusts the air flow and the flow rate of inlet air and outlet air, is used for the volatilization collection of farmland and lawn soil ammonia, has high integration level, simple process, low cost and easy operation, reduces the experimental cost and realizes high collection precision.
The purpose of the invention is realized by the following technical scheme:
a farmland and lawn soil ammonia volatilization collection device comprises an air inlet pipe, a first box body, a second box body, a cover, an air outlet pipe, an air collecting bottle and a vacuum pump which are connected in sequence; the upper part and the lower part of the first box body are both provided with openings, the second box body and the first box body form a seal by utilizing a liquid seal groove formed by a positioning ring, the second box body forms a seal by utilizing a flange and a cover, the second box body comprises a collecting device for collecting water drops formed by water vapor condensation, and strip-shaped cards are arranged at positions 5-10 mm above the first box body and the second box body and are used as carriers of a beaker and a funnel; the ammonia volatilization collection device is provided with a water drop collection device, the sampling cover is provided with an air outlet pipe which is communicated with the air inlet end of the air collecting bottle, and the sampling mechanism also comprises an air inlet pipe communicated with the first box body and is provided with a valve capable of controlling the size of air flow.
A farmland and lawn soil ammonia collection device that volatilizees, the high design of second box is adjustable, and its air inlet is greater than the gas outlet.
A farmland and lawn soil ammonia collection device that volatilizees, the intake pipe is linked together through communicating pipe and first box, and first box adopts peripheral holding ring to form the liquid seal groove, and the second box back-off is linked together with first box in the holding ring.
The farmland and lawn soil ammonia volatilization collecting device is characterized in that the internal water vapor collecting device is a funnel, a pipe body is arranged at the bottom of the funnel, and the funnel is communicated with a gas collecting bottle.
The invention has the advantages and effects that:
1. the air inlet pipe, the air outlet pipe, the cover, the first box body and the second box body can be detached, the first box body and the second box body are connected by the simple positioning ring liquid sealing groove, the detachment is convenient, the height of the box bodies can be changed, and the device can be applied to collection of ammonia volatilization of soil under growth of plants with different plant heights.
2. The ventilation system can keep nutrients and water in soil inside and outside the ammonia volatilization collection device and circulate air, and ensures that the internal and external environmental conditions of the ammonia volatilization collection device are kept consistent. And the inner diameter of the air inlet is larger than that of the air outlet, so that the air pressure inside the device is stable, and the negative pressure inside the device cannot be too large. The aim of accurate collection can be achieved by simulating the conditions of the near-natural environment.
3. The funnel is added in the second box body and used for collecting water drops formed by condensation of water vapor, and ammonia dissolved in the water vapor is also collected, so that the accuracy of an experimental result is ensured. The scale marks are additionally arranged on the outer wall of the first box body, and the pre-buried depth of the device can be roughly estimated according to the soft degree of the soil in the test area.
4. The invention inserts the first box body into a test sample plot, utilizes the air inlet pipe and the first box body together to stabilize the device, after the device is connected, the air flow enters the first box body along with the air inlet pipe after the vacuum pump is opened, passes through the second box body, and finally enters the air collecting bottle from the air outlet pipe.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
The components in the figure: 1. the device comprises a telescopic air inlet pipe, 2 parts of a first box body, 3 parts of a positioning ring, 4 parts of a second box body, 5 parts of a carrier wire gauze, 6 parts of a beaker, 7 parts of an air outlet pipe, 8 parts of a cover, 9 parts of an air collecting bottle, 10 parts of a guide pipe connected with a vacuum pump, 11 parts of the vacuum pump, 12 parts of an air flow control valve, 13 parts of a funnel, 14 parts of a flange and 15 parts of a strip-shaped clamp.
Detailed Description
The invention is described in detail below with reference to the following figures and embodiments:
the invention relates to a farmland and lawn soil ammonia volatilization collecting device which comprises an air inlet and outlet system and a collecting system, wherein a sampling mechanism comprises a telescopic air inlet pipe 1, a first box body 2, a second box body 4, a wire netting 5 beaker 6, a cover 8, a funnel 13, an air outlet pipe 7, an air collecting bottle 9 and a vacuum pump 11 which are sequentially connected. Intake pipe 1 highly is 2000 mm, the lower extreme is sealed, the upper end opening is provided with adjustable valve 12, the intake pipe is the scalable pipe of organic glass material, connect 2 high 150 mm departments apart from ground at first box, the diameter is 10 mm, second box 4 and gas collection bottle 9 are connected to outlet duct 7, the diameter is 8 mm, the intake pipe diameter is greater than the outlet duct, in order to guarantee that the device is inside can not be because of atmospheric pressure low can lead to in soil under the ammonia that can not volatilize by atmospheric pressure take out. The height of the first box body 2 is 300 mm, the radius of the column body is 160 mm, a strip-shaped card 15 is arranged at a position 5-10 mm away from the top end above the first box body, the width of the strip-shaped card is smaller than 10 mm, an iron net 5 is placed on the strip-shaped card, and a beaker 6 for collecting water drops formed by condensation of water vapor is placed above the iron net. The height of the second box body is 250 mm, the radius of the column body is 170 mm, a strip-shaped card is arranged at a position 5-10 mm away from the top end above the second box body, the width of the strip-shaped card is 5mm, a funnel with the radius of 160 mm is placed on the strip-shaped card, the width of the cover 8 is larger than that of the second box body, and a flange 14 is arranged outside the second box body for structural connection so as to ensure the air tightness and the convenience in disassembly and assembly of the second box body 4. The collecting box body comprises a first box body 2 and a second box body 4, the middle of the collecting box body is connected with a liquid sealing groove formed by a positioning ring 3, and an air inlet pipe 1 and an air outlet pipe 7 form an air flow and pressure adjusting system. The funnel 13 for collecting water drops is added inside, and the volatilization loss amount of ammonia is greatly reduced and the experimental error is effectively reduced based on the characteristic that the ammonia is very soluble in water (can be dissolved in water in a volume ratio of 1: 700). 1 length of intake pipe is 2000 mm, inhales the volatile ammonia of soil around when preventing that the field experiment from going on, and its lower extreme seals, can add a certain amount of grains of sand in the pipe when necessary to increase the stability of device itself, and body itself is scalable, conveniently carries when field test. The periphery of 2 upper ends of first box is fixed with holding ring 3, and the width of the liquid seal groove that the holding ring formed on 3, holding ring is 10 mm, highly is 10 mm, and holding ring 3 is arranged in to second box 4, forms the sampling cover that can change height, can the height of adjusting device second box 4, and the maximum height generally is no longer than 1500 mm, accords with the maximum plant height of farmland and lawn plant to reach the mesh that is applicable to multiple farmland and lawn soil ammonia and volatilizees and collect. The air inlet pipe 1 is arranged in the middle of the first box body 2, the air outlet pipe 7 is arranged at the top of the second box body 4, the ammonia gas volatilized from the soil is brought into the gas collecting bottle 9 along with the air flow, and the radius of the air inlet pipe 1 is larger than that of the air outlet pipe 7.
Example 1
As shown in figure 1, the ammonia volatilization collection device suitable for farmland and lawn soil comprises an air inlet pipe 1 communicated with a first box body 2, an air outlet pipe 7 communicated with a second box body 4 and a gas collecting bottle 9, the gas collecting bottle 9 connected with a vacuum pump 11, the second box body 4 communicated with the first box body 2 through a sealing liquid groove, the first box body 2 is positioned at the lower end of the second box body 4, the lower part of a connecting port of the air inlet pipe 1 and the first box body 2 is taken as an embedded section, scales are arranged outside the embedded section to estimate the depth inserted into the soil according to the soil softness degree of a local test area, the height of the embedded section is 6-10 cm, preferably 8 cm, the lower end of a telescopic air inlet pipe 1 can be filled with a certain amount of sand grains to ensure the stability of the device and prevent inclination, the diameter of the air inlet pipe 1 is larger than that of the air outlet pipe 7, so that the air inlet amount is larger than the air outlet amount, and the ammonia volatilization, the position of intake pipe 1 sets up in the middle section of first box 2, under the condition to ground surface production pressure, carries the volatile gaseous of soil into second box 4 and collects more smoothly according to the gas flow principle. First box 2 is connected with second box 4 and forms sampling mechanism, and second box 4 is inside to be provided with steam collection device, beaker 6 and funnel 13 promptly, and the upper end communicates with each other with the gas outlet, and the volatile gas of soil passes through outlet duct 7 and reachs gas collecting bottle 9 under vacuum pump 11's effect in the first box 2, and device reasonable in design, the integrated level is high, simple process, low cost, easily operation, the data accuracy of gathering is high. The gas collecting bottle adopts the glass gas collecting bottle of 500 ml sold on the market, the upper end is connected with the conduit with the rubber stopper, the second box body 4 is connected with the lid 8 with the flange 14, the equipment is simple and can guarantee the gas tightness, can take out the funnel 13 at any time after the experiment is completed and wash, adopt the liquid insoluble with ammonia as the sealing liquid according to the similar intermiscibility principle, the vacuum pump 11 adopts the rotary vane type vacuum pump sold on the market, the power of vacuum pump is decided by the air extraction volume. The box and the intake pipe 1 of whole device and outlet duct 7 are formed by the organic glass preparation that thickness is 3 mm, have kept the light transmissivity of PVC material, have increased the corrosion resistance of device simultaneously, can last work under open-air adverse circumstances, have prolonged the life of device.
As the neotype further improvement of this experiment, the unchangeable nature of collecting mechanism itself has been changed, peripheral position ring 3 has been designed for two boxes physical stamina is very convenient be connected to together, and can guarantee its leakproofness, simultaneously, considers based on the nature of ammonia itself, has add the collection device in the second box 4, as collection device's funnel 13, not together fixed with second box 4, but through the bar card with its interception in second box 4, the obvious benefit of design like this is: after the experiment is accomplished, can take out funnel 13 and clear collection, do not influence going on of secondary test, consider to outlet duct and intake pipe and be: the designed diameter of the air inlet pipe 1 is larger than that of the air outlet pipe 7, so that the collection of volatile gas is facilitated. The height of the air inlet pipe 1 is set to be within the range which is not influenced by ammonia volatilized by non-experimental soil, 2000 mm is used as the best, the air inlet pipe is telescopic, and the air inlet pipe is convenient to carry during field experiments. The device has the advantages of reasonable design, simple process, high integration level, low cost, high operability and high data acquisition precision.
After the device is connected with reference to the illustration chart, a guide pipe from an air outlet pipe of the collecting system in the air collecting bottle is inserted into dilute sulfuric acid absorption liquid, the air outlet guide pipe in the air collecting bottle is placed above the absorption liquid, and a vacuum pump is started to start a test after the connection of the inspection device is finished. Continuously exhausting for 3 hours in the morning and 3 hours in the evening, and converting the ammonia gas volatilized in 6 hours into the ammonia gas volatilization amount of 1 day (d).
Calculating the formula:
NH of soil3The volatilization rate formula:
in the formula:
is NH3The volatilization rate is expressed in kg/(hm)2·d)；
NH measured each time by a single device for aeration3Amount in mg;
is the cross-sectional area of the collecting device, in m2；
For each successive collectionTime in units of d.
Soil NH3The calculation formula of the accumulated volatilization amount is as follows:
in the formula:
is NH to soil3The unit of the volatile accumulated volatile amount is kg/hm2(ii) a n represents the number of times measured after fertilization;
the time after the ith fertilization measurement is expressed as d;
is NH at the i-th measurement3The volatilization rate is expressed in kg/(hm)2·d)。
Claims (4)
1. A farmland and lawn soil ammonia volatilization collection device is characterized by comprising an air inlet pipe, a first box body, a second box body, a cover, an air outlet pipe, an air collection bottle and a vacuum pump which are connected in sequence; the upper part and the lower part of the first box body are both provided with openings, the second box body and the first box body form a seal by utilizing a liquid seal groove formed by a positioning ring, the second box body forms a seal by utilizing a flange and a cover, the second box body comprises a collecting device for collecting water drops formed by water vapor condensation, and strip-shaped cards are arranged at positions 5-10 mm above the first box body and the second box body and are used as carriers of a beaker and a funnel; the ammonia volatilization collection device is provided with a water drop collection device, the sampling cover is provided with an air outlet pipe which is communicated with the air inlet end of the air collecting bottle, and the sampling mechanism also comprises an air inlet pipe communicated with the first box body and is provided with a valve capable of controlling the size of air flow.
2. The ammonia volatilization and collection device for farmland and lawn soil as claimed in claim 1, wherein the height of the second box body is designed to be adjustable, and the air inlet is larger than the air outlet.
3. The ammonia volatilization and collection device for farmland and lawn soil as claimed in claim 1, wherein the air inlet pipe is communicated with the first box body through a communicating pipe, the first box body adopts a peripheral positioning ring to form a liquid sealing groove, and the second box body is reversely buckled in the positioning ring and is communicated with the first box body.
4. The ammonia volatilization and collection device for farmland and lawn soil as claimed in claim 1, wherein the internal water vapor collection device is a funnel, the bottom of the funnel is provided with a pipe body, and the funnel is communicated with the gas collection bottle.
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| CN201910914837.XA CN110686942A (en) | 2019-09-26 | 2019-09-26 | Farmland and lawn soil ammonia collection device that volatilizees |
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| CN201910914837.XA CN110686942A (en) | 2019-09-26 | 2019-09-26 | Farmland and lawn soil ammonia collection device that volatilizees |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579318A (en) * | 2020-06-09 | 2020-08-25 | 苏州方元智能环保科技有限公司 | Sampling device and sampling method applied to determination of ammonium nitrogen isotope |
| CN111964987A (en) * | 2020-08-20 | 2020-11-20 | 中国科学院、水利部成都山地灾害与环境研究所 | Full-automatic ammonia collection system that volatilizees |
| CN112557251A (en) * | 2020-12-18 | 2021-03-26 | 中国科学院沈阳应用生态研究所 | Device and method for simply measuring ammonia volatilization rate of soil or compost |
| CN112557251B (en) * | 2020-12-18 | 2024-06-07 | 中国科学院沈阳应用生态研究所 | Device and method for simply measuring volatilization rate of ammonia in soil or compost |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111579318A (en) * | 2020-06-09 | 2020-08-25 | 苏州方元智能环保科技有限公司 | Sampling device and sampling method applied to determination of ammonium nitrogen isotope |
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| CN112557251A (en) * | 2020-12-18 | 2021-03-26 | 中国科学院沈阳应用生态研究所 | Device and method for simply measuring ammonia volatilization rate of soil or compost |
| CN112557251B (en) * | 2020-12-18 | 2024-06-07 | 中国科学院沈阳应用生态研究所 | Device and method for simply measuring volatilization rate of ammonia in soil or compost |
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