CN110646252A - Dry-wet alternation rice field is with portable timing multiple spot ammonia sampling device that volatilizees - Google Patents
Dry-wet alternation rice field is with portable timing multiple spot ammonia sampling device that volatilizees Download PDFInfo
- Publication number
- CN110646252A CN110646252A CN201910923632.8A CN201910923632A CN110646252A CN 110646252 A CN110646252 A CN 110646252A CN 201910923632 A CN201910923632 A CN 201910923632A CN 110646252 A CN110646252 A CN 110646252A
- Authority
- CN
- China
- Prior art keywords
- dry
- sampling device
- sampling
- portable
- wet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01N1/24—Suction devices
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (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
The invention relates to the technical field of paddy field experiments, in particular to a portable timing multipoint ammonia volatilization sampling device for a dry-wet alternating paddy field, which comprises a supporting ring plate, wherein the outer surface of the supporting ring plate is provided with a sliding chute, a sliding rod is arranged inside the sliding chute, the other end of the sliding rod is fixedly connected with a mounting plate, the bottom of the mounting plate is provided with a closed air chamber through a fixing rod, the top of the closed air chamber is respectively provided with a sponge plug and a sampling pipe, a supporting upright post is arranged on the lower surface of the supporting ring plate, the bottom of the supporting upright post is fixedly provided with a supporting bottom plate, and one side. According to the invention, the closed air chamber can be conveniently and stably adjusted at different rice field positions through the sliding chute and the sliding rod, so that multi-point ammonia volatilization sampling is realized, the timer and the controller are arranged, sampling is carried out at regular time, the whole equipment is integrally arranged, the whole equipment is convenient to carry and move, and convenience is provided for rice field experiment sampling.
Description
Technical Field
The invention relates to the technical field of paddy field experiments, in particular to a portable timing multi-point ammonia volatilization sampling device for a dry-wet alternating paddy field.
Background
The average fertilizing amount of the rice in China is about 190 kg-ha-1, which is 1.9 times of the average level in the world, and the annual fertilizing (nitrogen) amount in local areas even exceeds 600 kg-ha-1. according to the statistics in 2010, the nitrogen consumption of the rice in China accounts for about 31.3% of the total nitrogen consumption of the rice in the world, and the nitrogen increasing fertilizer is used for improving the rice productivity, and simultaneously, the serious low utilization rate of the nitrogen fertilizer, causing underground water pollution, air pollution, eutrophication of a large number of water areas and other environmental problems, even causing yield reduction of the rice, soil hardening degradation and the like, while the NH3 volatilization is a main way for the nitrogen fertilizer loss of the rice field, 80% ~ 90% of NH3 in the atmosphere comes from the field, and accounts for 20 ~ 30% of the nitrogen fertilizer, so the research on the ammonia volatilization of the field is always an important content of nitrogen circulation of the ecological system of the field.
The dry-wet alternative irrigation is the most widely used irrigation mode in a plurality of water-saving technologies of rice fields, has great water-saving potential, can obviously reduce the water resource consumption in the rice production process, improves or maintains the rice yield, further improves the water production rate, and is widely applied and accepted in different countries such as China, India, Philippines, Japan, Vietnam, England and the like. However, under continuous flooding conditions, the rice field is in an anaerobic environment for a long time, and ammonium nitrogen is the main effective N fertilizer in soil. Under the condition of direct seeding of dry paddy, the paddy field is basically in an aerobic environment, and nitrate nitrogen is the main existing form of available nitrogen in soil. Under the condition of dry-wet alternate irrigation, the rice field is always in the process of soil water saturation and non-saturation, aerobic and anaerobic, and soil oxidation and reduction rapid replacement, so that the water condition and nitrogen circulation of the rice field are obviously changed, the volatile loss of NH3 is increased, and the rapid formation of nitrate nitrogen is promoted. The characteristic determines the complexity and the particularity of soil moisture condition and nitrogen circulation of the paddy field under the dry-wet alternative irrigation condition, not only leads to the spatial difference of ammonia volatilization, but also further exacerbates the variability in the time dimension. Comparing with the current method for measuring ammonia volatilization of soil at home and abroad. The microclimate method, the wind tunnel method and the tunable diode laser absorption spectroscopy can be directly used for sampling and measuring air above a test area, the accuracy is high, and a large test area (> 1hm 2) is required. The traditional closed chamber method belongs to time point sampling, and has poor representativeness under the environment of uneven dry-wet alternation of space-time parts, so that the requirement on test precision cannot be met. In order to solve the problems in the prior art, the invention provides a portable timing multi-point ammonia volatilization sampling device suitable for a dry-wet alternating rice field, and provides a novel device for scientific research personnel to collect ammonia volatilization in the dry-wet alternating rice field.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a portable timing multi-point ammonia volatilization sampling device for a dry-wet alternating rice field.
In order to achieve the purpose, the invention adopts the following technical scheme:
a portable timing multi-point ammonia volatilization sampling device for a dry-wet alternating rice field, which comprises a supporting ring plate, the outer surface of the mounting plate is provided with a chute, a slide bar is arranged inside the chute, the other end of the slide bar is fixedly connected with a mounting plate, the bottom of the mounting plate is provided with a closed air chamber through a fixed rod, the top of the closed air chamber is respectively provided with a sponge plug and a sampling pipe, the supporting upright post is arranged on the lower surface of the supporting ring plate, a supporting base plate is fixedly arranged at the bottom of the supporting upright post, a gas washing bottle is arranged at one side of the supporting upright post, a movable communicating pipe is sleeved at the top of the gas washing bottle through a movable plug, one end of the movable communicating pipe passes through the sampling pipe and extends to the inside of the closed gas chamber, the vacuum pump is arranged on the other side of the supporting upright post, the flow meter is arranged on the vacuum pump, the output end of the vacuum pump is provided with a connecting pipe, and one end of the connecting pipe extends to the interior of the gas washing bottle.
Preferably, the sliding groove is formed in a T shape, the sliding rod is of a T-shaped structure, the horizontal rod body of the sliding rod is located in the horizontal groove body of the sliding groove, and one end of the vertical rod body of the sliding rod penetrates through the vertical groove body of the sliding groove.
Preferably, a boric acid solution is arranged in the gas washing bottle, and one end of the movable communicating pipe is positioned below the liquid level of the boric acid solution.
Preferably, a timer and a controller are respectively arranged on the supporting upright column, the timer is electrically connected with the controller, and the controller is electrically connected with the vacuum pump.
Preferably, the controller is an SC200 universal controller, and the timer is TW-IEDJ/S.
Preferably, a plurality of operation handles are arranged on the top of the support ring plate.
Preferably, a plurality of tapered feet are fixedly arranged on the lower surface of the supporting bottom plate.
Compared with the prior art, the device can conveniently and stably adjust the closed air chamber at different rice field positions through the sliding groove and the sliding rod, realizes multi-point ammonia volatilization sampling, is provided with the timer and the controller, performs sampling operation at regular time, is integrally arranged, is convenient to carry and move integrally, and provides convenience for rice field experiment sampling operation.
Drawings
FIG. 1 is a schematic view showing the construction of a portable timing multi-point ammonia evaporation sampling device for dry-wet alternating rice field according to the present invention;
FIG. 2 is a schematic view of a portable timing multi-point ammonia evaporation sampling device for dry-wet alternating rice field at position A according to the present invention.
In the figure: the device comprises a supporting ring plate 1, a sliding chute 11, a supporting upright post 2, a supporting bottom plate 21, a mounting plate 3, a sliding rod 31, a sealed air chamber 4, a sponge plug 41, a sampling pipe 42, a gas washing bottle 5, a movable plug sleeve 51, a movable communicating pipe 52, a vacuum pump 6, a connecting pipe 61, a flow meter 7, a controller 8, a timer 9 and an operating handle 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Referring to fig. 1-2, a portable timing multi-point ammonia volatilization sampling device for dry-wet alternation rice field, comprising a supporting ring plate 1, a chute 11 is arranged on the outer surface of the supporting ring plate 1, a slide bar 31 is arranged inside the chute 11, a mounting plate 3 is welded at the other end of the slide bar 31, a closed air chamber 4 is arranged at the bottom of the mounting plate 3 through a fixing bar, a sponge plug 41 and a sampling pipe 42 are respectively arranged at the top of the closed air chamber 4, a supporting upright post 2 is arranged on the lower surface of the supporting ring plate 1, a supporting base plate 21 is fixedly arranged at the bottom of the supporting upright post 2 through a screw, a gas washing bottle 5 is arranged at one side of the supporting upright post 2, a movable communicating pipe 52 is arranged at the top of the gas washing bottle 5 through a movable plug sleeve 51, one end of the movable communicating pipe 52 passes through the sampling pipe 42 and extends, and the output end of the vacuum pump 6 is provided with a connection pipe 61, one end of which extends to the inside of the gas washing bottle 5.
In this embodiment, the chute 11 is opened for the T type, and the slide bar 31 is a T type structure, and the horizontal rod body of the slide bar 31 is located in the horizontal groove body of the chute 11, and the vertical groove body of the chute 11 is passed through to the one end of the vertical rod body of the slide bar 31, so that the slide bar 31 can only move along the direction of the chute 11, and further the stability of the position adjustment work of the installation part 3 and the airtight air chamber 4 is ensured.
Wherein, the inside of gas washing bottle 5 is provided with boric acid solution, and the one end of activity communicating pipe 52 is located below the liquid level of boric acid solution, guarantees that sampling work normally goes on, is provided with timer 9 and controller 8 on the support post 2 respectively, and timer 9 and controller 8 electric connection, controller 8 and vacuum pump 6 electric connection carry out timing work through timer 9, and timer 9 sends signal for controller 8 in required time, and controller 8 makes vacuum pump 6 work.
Specifically, the model of controller 8 is the general type controller of SC200, the model of timer 9 is TW-IEDJ/S, the top of support ring board 1 is provided with a plurality of operation handles 10, the lower fixed surface of supporting baseplate 21 is provided with a plurality of toper footing, utilize the toper footing to fix inserting supporting baseplate 21 and establish in the paddy field and carry out the operation, supporting baseplate 21' S stability is strong, guarantee the going on of sampling work, and sampling pipe 42 is tee bend or cross-pass structure, can external a plurality of airtight air chambers 4 through sampling pipe 42, realize multiple spot sampling work.
In this embodiment, the chute 11 and the sliding rod 31 of the T-shaped structure form the closed air chamber 4, so that the position of the closed air chamber 4 can be rotationally adjusted along the direction of the chute 11, the purpose of multi-point sampling is achieved, and in the process of rotation of the closed air chamber 4, the movable communicating pipe 52 can also rotate, the feasibility of the whole work is ensured, and the operation tightness of the movable communicating pipe 52 is further ensured by using the sampling pipe 42 and the movable plug sleeve 51.
In addition, set up timer 9 and controller 8 on support post 2, can regularly carry out the sampling work through timer 9, in the required time, timer 9 order controller 8 moves, and controller 8 makes the action of vacuum pump 6, carries out holistic sampling work, and each part of equipment is through supporting the integrative setting of crown plate 1, carry and draw handle 10 can be convenient carry on wholly and remove, has made things convenient for going on of paddy field experiment sampling work.
In the embodiment, the closed air chamber 4 consists of a bottom box and a top box which are made of PVC materials, the diameter is 20cm, the height is 30cm, the closed air chamber is connected with a 500mL glass absorption bottle, a micro vacuum pump 6 (the maximum flow rate is 38L/mm) and a flowmeter 7, two vent holes are arranged at the top of the closed chamber, one vent hole (the diameter is 30 mm) is connected with a vent pipe which is erected at the height of 2.5m away from the ground, a sponge dipped with a glycerol phosphate solution is plugged into the top of the vent pipe to reduce the influence of surface air exchange on ammonia volatilization measurement, the glycerol phosphate solution is configured, 50mL phosphoric acid and 40mL glycerol are fixed to the volume of 1000mL, the ventilation frequency of the closed air chamber 4 is adjusted to be 10 ~ 15 times/mm through the flowmeter 7 during air extraction, the sampling time is started on the day after each fertilization until ammonia volatilization and contrast of different treatment cells are not different, the sampling time is 9: 00 ~ 11: 00 in the morning, the air extraction time is ensured for 2h during sampling, and the chamber is randomly shifted after each air extraction for 30.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a dry and wet alternation paddy field is with portable timing multiple spot ammonia sampling device that volatilizees which characterized in that includes:
the device comprises a supporting ring plate (1), wherein a sliding groove (11) is formed in the outer surface of the supporting ring plate, a sliding rod (31) is arranged inside the sliding groove (11), the other end of the sliding rod (31) is fixedly connected with a mounting plate (3), the bottom of the mounting plate (3) is provided with a closed air chamber (4) through a fixing rod, and the top of the closed air chamber (4) is respectively provided with a sponge plug (41) and a sampling pipe (42);
support column (2), set up in the lower surface of above-mentioned support ring board (1), and the fixed supporting baseplate (21) that is equipped with in bottom of support column (2), one side of support column (2) is provided with gas washing bottle (5), and the top of gas washing bottle (5) is provided with movable communicating pipe (52) through activity plug bush (51), and the inside that sampling pipe (42) extended to airtight air chamber (4) is passed to the one end of movable communicating pipe (52), the opposite side of support column (2) is provided with vacuum pump (6), is provided with flowmeter (7) on vacuum pump (6), and the output of vacuum pump (6) is provided with connecting pipe (61), and its one end extends to the inside of gas washing bottle (5).
2. The portable timed multipoint ammonia volatilization sampling device for the rice fields with the alternation of dryness and wetness as claimed in claim 1, wherein the chute (11) is provided with a T-shaped opening, the slide bar (31) is of a T-shaped structure, the horizontal bar body of the slide bar (31) is positioned in the horizontal groove body of the chute (11), and one end of the vertical bar body of the slide bar (31) passes through the vertical groove body of the chute (11).
3. The portable timed multipoint ammonia volatilization sampling device for rice fields with alternation of dry and wet as claimed in claim 1, wherein the inside of the gas washing bottle (5) is provided with boric acid solution, and one end of the movable communicating pipe (52) is positioned below the liquid level of the boric acid solution.
4. The portable timed multipoint ammonia volatilization sampling device for rice fields with wet and dry alternation according to claim 1, wherein the supporting upright post (2) is respectively provided with a timer (9) and a controller (8), the timer (9) is electrically connected with the controller (8), and the controller (8) is electrically connected with the vacuum pump (6).
5. The portable timed multipoint ammonia evaporation sampling device for rice fields alternating dry and wet according to claim 4, characterized in that the model of said controller (8) is SC200 general type controller and the model of timer (9) is TW-IEDJ/S.
6. The portable timed multipoint ammonia volatilization sampling device for rice fields with alternation of dry and wet as claimed in claim 1, wherein the top of the supporting ring plate (1) is provided with a plurality of operation handles (10).
7. The portable timed multipoint ammonia volatilization sampling device for rice fields with alternation of dry and wet as set forth in claim 1, wherein a plurality of tapered feet are fixedly arranged on the lower surface of the support base plate (21).
8. The portable timed multipoint ammonia volatilization sampling device for dry-wet alternating rice fields as claimed in claim 1, wherein the sampling tube (42) is of a three-way structure.
9. The portable timed multipoint ammonia volatilization sampling device for dry-wet alternating rice fields as claimed in claim 1, wherein the sampling tube (42) is of a four-way structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923632.8A CN110646252A (en) | 2019-09-27 | 2019-09-27 | Dry-wet alternation rice field is with portable timing multiple spot ammonia sampling device that volatilizees |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923632.8A CN110646252A (en) | 2019-09-27 | 2019-09-27 | Dry-wet alternation rice field is with portable timing multiple spot ammonia sampling device that volatilizees |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110646252A true CN110646252A (en) | 2020-01-03 |
Family
ID=68992894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910923632.8A Pending CN110646252A (en) | 2019-09-27 | 2019-09-27 | Dry-wet alternation rice field is with portable timing multiple spot ammonia sampling device that volatilizees |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110646252A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272502A (en) * | 2020-04-02 | 2020-06-12 | 沈阳农业大学 | Collection device for exerting ammonia in field community and use method |
| 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 |
| CN114557160A (en) * | 2022-02-17 | 2022-05-31 | 江西省农业科学院土壤肥料与资源环境研究所 | Southern paddy field nitrogen and phosphorus loss prevention and control equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8916553D0 (en) * | 1989-07-20 | 1989-09-06 | Atomic Energy Authority Uk | Sensor device |
| CN102207454A (en) * | 2011-04-01 | 2011-10-05 | 中国科学院南京土壤研究所 | Device and method for field in-situ determination of farmland ammonia volatilization |
| CN102426297A (en) * | 2011-08-17 | 2012-04-25 | 陕西理工学院 | Wireless multipoint soil resistivity measuring system |
| CN104966128A (en) * | 2015-03-27 | 2015-10-07 | 中国农业科学院农业资源与农业区划研究所 | Method for predicting agricultural non-point source pollution county-scale surface runoff total nitrogen emissions |
| CN105954072A (en) * | 2016-06-23 | 2016-09-21 | 江苏省农业科学院 | Field farmland volatilized ammonia collecting device based on photovoltaic power generation |
| CN206208600U (en) * | 2016-09-30 | 2017-05-31 | 北京中自宏毅科技发展有限公司 | A kind of fixed-point water quality sampler |
| CN107621525A (en) * | 2017-08-28 | 2018-01-23 | 沈阳裕赓种业有限公司 | The method identified using content of glutamic acid and screen rice varieties |
| CN209055370U (en) * | 2018-11-02 | 2019-07-02 | 杭州环研科技有限公司 | A kind of novel malodor sampling device |
-
2019
- 2019-09-27 CN CN201910923632.8A patent/CN110646252A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8916553D0 (en) * | 1989-07-20 | 1989-09-06 | Atomic Energy Authority Uk | Sensor device |
| CN102207454A (en) * | 2011-04-01 | 2011-10-05 | 中国科学院南京土壤研究所 | Device and method for field in-situ determination of farmland ammonia volatilization |
| CN102426297A (en) * | 2011-08-17 | 2012-04-25 | 陕西理工学院 | Wireless multipoint soil resistivity measuring system |
| CN104966128A (en) * | 2015-03-27 | 2015-10-07 | 中国农业科学院农业资源与农业区划研究所 | Method for predicting agricultural non-point source pollution county-scale surface runoff total nitrogen emissions |
| CN105954072A (en) * | 2016-06-23 | 2016-09-21 | 江苏省农业科学院 | Field farmland volatilized ammonia collecting device based on photovoltaic power generation |
| CN206208600U (en) * | 2016-09-30 | 2017-05-31 | 北京中自宏毅科技发展有限公司 | A kind of fixed-point water quality sampler |
| CN107621525A (en) * | 2017-08-28 | 2018-01-23 | 沈阳裕赓种业有限公司 | The method identified using content of glutamic acid and screen rice varieties |
| CN209055370U (en) * | 2018-11-02 | 2019-07-02 | 杭州环研科技有限公司 | A kind of novel malodor sampling device |
Non-Patent Citations (1)
| Title |
|---|
| 李英豪: "沸石氮肥管理对水稻产量及稻米品质的影响", 《沈阳农业大学学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272502A (en) * | 2020-04-02 | 2020-06-12 | 沈阳农业大学 | Collection device for exerting ammonia in field community and use method |
| 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 |
| CN114557160A (en) * | 2022-02-17 | 2022-05-31 | 江西省农业科学院土壤肥料与资源环境研究所 | Southern paddy field nitrogen and phosphorus loss prevention and control equipment |
| CN114557160B (en) * | 2022-02-17 | 2023-09-05 | 江西省农业科学院土壤肥料与资源环境研究所 | South paddy field nitrogen and phosphorus loss prevention and control equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110646252A (en) | Dry-wet alternation rice field is with portable timing multiple spot ammonia sampling device that volatilizees | |
| CN204495627U (en) | Agricultural land soil ammonia volatilization in-situ monitoring device | |
| CN205192808U (en) | Soil ammonia volatilization trapping apparatus | |
| CN205157419U (en) | Soil nutrients detection device based on it is thus clear that - near infrared spectroscopy is technological | |
| CN105319172A (en) | Soil nutrient detection device based on visible-near infrared spectroscopy | |
| CN209656696U (en) | A kind of packaged type soil moisture detection device | |
| CN108076768A (en) | A kind of mobile model fertilizer apparatus for garden maintenance | |
| CN106018670A (en) | Field in-situ monitoring method of ammonia volatilization from farmland soils | |
| CN111272502A (en) | Collection device for exerting ammonia in field community and use method | |
| CN104807864B (en) | A kind of digital electrode and measurement device measuring perfluoro caprylic acid content | |
| CN210641419U (en) | Automatic soil testing and formulated fertilization device | |
| CN209432481U (en) | A kind of environment measuring sampler of coffee plantation | |
| CN219200963U (en) | Sewage on-line monitoring sampling device | |
| CN202533269U (en) | Potting soil column device suitable for researching soil and soil solution | |
| CN105954072A (en) | Field farmland volatilized ammonia collecting device based on photovoltaic power generation | |
| CN214333641U (en) | Land supervision measurement area measuring device | |
| CN207894367U (en) | A kind of groove type solar speculum detection device | |
| CN104820001B (en) | A kind of method for determining perfluoro caprylic acid content | |
| CN212276649U (en) | Simulation device for physical gravity experiment | |
| CN109275448B (en) | Road green belt capable of automatically monitoring soil fertility degree | |
| CN211482278U (en) | Automatic watering device for flowers | |
| CN212568773U (en) | Energy-saving gardens soil environment monitoring facilities | |
| CN206695725U (en) | The measurement apparatus of plant height in a kind of growing process | |
| CN213398532U (en) | Quick detection device of saline and alkaline land | |
| CN220159806U (en) | Refining device is used in fertilizer production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200103 |