CN106018670A - Field in-situ monitoring method of ammonia volatilization from farmland soils - Google Patents
Field in-situ monitoring method of ammonia volatilization from farmland soils Download PDFInfo
- Publication number
- CN106018670A CN106018670A CN201610505603.6A CN201610505603A CN106018670A CN 106018670 A CN106018670 A CN 106018670A CN 201610505603 A CN201610505603 A CN 201610505603A CN 106018670 A CN106018670 A CN 106018670A
- Authority
- CN
- China
- Prior art keywords
- ammonia
- boric acid
- volatilization
- field
- ammonia volatilization
- 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
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 66
- 239000002689 soil Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004327 boric acid Substances 0.000 claims abstract description 19
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004448 titration Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000007872 degassing Methods 0.000 claims description 4
- 235000011149 sulphuric acid Nutrition 0.000 claims description 4
- 239000001117 sulphuric acid Substances 0.000 claims description 4
- FRPHFZCDPYBUAU-UHFFFAOYSA-N Bromocresolgreen Chemical compound CC1=C(Br)C(O)=C(Br)C=C1C1(C=2C(=C(Br)C(O)=C(Br)C=2)C)C2=CC=CC=C2S(=O)(=O)O1 FRPHFZCDPYBUAU-UHFFFAOYSA-N 0.000 claims description 3
- 229920005372 Plexiglas® Polymers 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000003337 fertilizer Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 6
- 230000004720 fertilization Effects 0.000 abstract description 4
- 239000000618 nitrogen fertilizer Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000010149 Brassica rapa subsp chinensis Nutrition 0.000 description 1
- 235000000536 Brassica rapa subsp pekinensis Nutrition 0.000 description 1
- 241000499436 Brassica rapa subsp. pekinensis Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 235000013877 carbamide Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002362 mulch Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000001926 trapping method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0054—Ammonia
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Combustion & Propulsion (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Biomedical Technology (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a field in-situ monitoring method of ammonia volatilization from farmland soils. The method comprises the steps: adopting an intermittent airtight extraction method, enabling ammonia volatilized out of the soil in a cover to flow through a gas washing bottle with 2% boric acid by extracting a gas under reduced pressure by using a vacuum pump, enabling the ammonia to be absorbed in a boric acid solution, and then tiltrating the ammonia absorbed in the boric acid with standard boric acid. The method provided by the invention has the beneficial effects that the ammonia volatilization loss and influencing factors thereof under the conventional farmland fertilization conditions are effectively monitored by determining the loss of a nitrogen fertilizer applied to the farmland, and a basis is provided for understanding the ammonia volatilization loss characteristics, reducing N loss, and improving the utilization rate of the N fertilizer.
Description
Technical field
The method that the present invention relates to field in-situ monitoring agricultural land soil ammonia volatilization.
Background technology
Ammonia volatilization is one of important channel of fertilizer nitrogen loss, and loss rate exists the biggest difference because soil types, weather conditions, fertilizer amount, fertilization time and mode, cultivation mode etc. are different.In prior art, do not has the monitoring method of the system to soil ammonia volatilization.
Summary of the invention
The purpose of the present invention is aiming at above-mentioned defect of the prior art, it is provided that the method for field in-situ monitoring agricultural land soil ammonia volatilization.
To achieve these goals, the technical scheme that the present invention provides is: the method for field in-situ monitoring agricultural land soil ammonia volatilization, it is to use the airtight degassing method of interval, utilize vacuum pump pressure bleed the ammonia making soil in cover volatilize with air-flow by the Drexel bottle equipped with 2% boric acid, make ammonia be absorbed in boric acid solution, then with standard sulphuric acid titration boric acid absorbed in ammonia.
Further, the method for above-mentioned field in-situ monitoring agricultural land soil ammonia volatilization, the field of employing ammonia volatilization confined chamber air exchange subtraction unit in situ includes air exchange room, vent rod, vacuum suction control equipment, ammonia absorbent, ammonia mensuration agent；Wherein, air exchange room is that bottom is open, top is provided with the Plexiglas cylinder of two outlets, two outlets are respectively air inlet and gas outlet, air inlet is connected with the hollow plastic vent rod that height is 2.5m by corrugated tubing, gas outlet is connected with ammonia absorption plant, the ammonia produced in switch room is absorbed in absorbing liquid by the negative pressure that vacuum pump provides, in keeping switch room by control valve, air exchange frequency is 10-15 beat/min, after end of bleeding, with standard dilute sulfuric acid titrimetry, absorbing liquid is calculated ammonia volatilization amount.
Further, the method of above-mentioned field in-situ monitoring agricultural land soil ammonia volatilization, described absorbing liquid is 2% boric acid solution containing indicator, and described indicator is C.I. 13020 .-bromocresol green mixed indicator, being by C.I. 13020. 1 gram, bromocresol green 5 grams mixing adds 1000ml
In the ethanol of 95%.
The method that the invention have the benefit that the field in-situ monitoring agricultural land soil ammonia volatilization that the present invention provides, the loss of nitrogenous fertilizer is applied by measuring farmland, effectively monitor ammonia loss by volatilization and influence factor thereof under the conditions of the conventional fertilizer application of farmland, for understanding ammonia loss by volatilization feature, reducing the loss of N element, improving N fertilizer utilization rate provides foundation.
The ammonia volatilization Field trapping method that the present invention provides uses the airtight degassing method principle of interval.It is to utilize vacuum pump pressure to bleed the ammonia (NH making soil in cover volatilize3) with air-flow by equipped with the Drexel bottle of 2% boric acid so that it is be absorbed in boric acid solution, then titrate the ammonia absorbed in boric acid with standard sulphuric acid.Ammonia volatilization confined chamber air exchange subtraction unit is as shown in Figure 1.
Accompanying drawing explanation
Fig. 1 is ammonia volatilization confined chamber air exchange subtraction unit schematic diagram.
Fig. 2 is that embodiment 1 monitors community process schematic diagram.
Detailed description of the invention
Embodiment 1:
The method of field in-situ monitoring agricultural land soil ammonia volatilization, it is to use the airtight degassing method of interval, utilize vacuum pump pressure bleed the ammonia making soil in cover volatilize with air-flow by the Drexel bottle equipped with 2% boric acid, make ammonia be absorbed in boric acid solution, then with the ammonia absorbed in standard sulphuric acid titration boric acid；The field used ammonia volatilization confined chamber air exchange subtraction unit in situ includes air exchange room, vent rod, vacuum suction control equipment, ammonia absorbent, ammonia mensuration agent；Wherein, air exchange room is that bottom is open, top is provided with the Plexiglas cylinder of two outlets, two outlets are respectively air inlet and gas outlet, air inlet is connected with the hollow plastic vent rod that height is 2.5m by corrugated tubing, gas outlet is connected with ammonia absorption plant, the ammonia produced in switch room is absorbed in absorbing liquid by the negative pressure that vacuum pump provides, in keeping switch room by control valve, air exchange frequency is 10-15 beat/min, after end of bleeding, with standard dilute sulfuric acid titrimetry, absorbing liquid is calculated ammonia volatilization amount；Absorbing liquid is 2% boric acid solution containing indicator, and indicator is C.I. 13020 .-bromocresol green mixed indicator, is by C.I. 13020. 1 gram, and bromocresol green 5 grams mixing adds 1000ml
In the ethanol of 95%.
Experimental cultivar is Chinese cabbage.Sowing date is July 1.Being orchidization carbamide for examination nitrogenous fertilizer, usage amount is 20 kilograms.If 3 process, point 3 communities.3 process are respectively mulch film ridge culture, the flat work of full film, the flat work of half film.Plot area is 20m2.Ridge culture ridge is 10cm, and row spacing is 60cm.Putting down and make full film, the width of film is 80cm.Flat work half film, the width of film is 60cm.Wherein spacing in the rows is 35cm, and line-spacing is 50cm.Concrete form is as shown in Figure 2.
Measurement result:
1, the ammonia volatilization speed inside and outside ammonia absorption plant air chamber: the solution ammonia volatilization speed under ammonia volatilization collection device is significantly lower than the ammonia volatilization speed under outdoor mild wind state.
2, Different Fertilization ammonia volatilization in period rate change: more different fertilizing time ammonia loss by volatilization amounts and account for the ratio of dose and show, Different Fertilization ammonia volatilization in period speed is different.High temperature strengthens the speed of volatilization, pours water and inhibits soil table to heat, it is possible to decrease ammonia volatilization.
3, the dose impact on ammonia volatilization: test shows, increases with the increase of dose each fertilizer application period ammonia volatilization amount but ammonia volatilization N accounts for and applies N ratio in different trend.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention, although the present invention being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (3)
1. the method for field in-situ monitoring agricultural land soil ammonia volatilization, it is characterized in that, it is to use the airtight degassing method of interval, utilize vacuum pump pressure bleed the ammonia making soil in cover volatilize with air-flow by the Drexel bottle equipped with 2% boric acid, make ammonia be absorbed in boric acid solution, then with standard sulphuric acid titration boric acid absorbed in ammonia.
The method of field the most according to claim 1 in-situ monitoring agricultural land soil ammonia volatilization, it is characterized in that, the field of employing ammonia volatilization confined chamber air exchange subtraction unit in situ includes air exchange room, vent rod, vacuum suction control equipment, ammonia absorbent, ammonia mensuration agent；Wherein, air exchange room is that bottom is open, top is provided with the Plexiglas cylinder of two outlets, two outlets are respectively air inlet and gas outlet, air inlet is connected with the hollow plastic vent rod that height is 2.5m by corrugated tubing, gas outlet is connected with ammonia absorption plant, the ammonia produced in switch room is absorbed in absorbing liquid by the negative pressure that vacuum pump provides, in keeping switch room by control valve, air exchange frequency is 10-15 beat/min, after end of bleeding, with standard dilute sulfuric acid titrimetry, absorbing liquid is calculated ammonia volatilization amount.
The method of field the most according to claim 2 in-situ monitoring agricultural land soil ammonia volatilization, it is characterized in that, described absorbing liquid is 2% boric acid solution containing indicator, described indicator is C.I. 13020 .-bromocresol green mixed indicator, being by C.I. 13020. 1 gram, bromocresol green 5 grams mixing adds in the ethanol of 1000ml 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610505603.6A CN106018670A (en) | 2016-07-01 | 2016-07-01 | Field in-situ monitoring method of ammonia volatilization from farmland soils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610505603.6A CN106018670A (en) | 2016-07-01 | 2016-07-01 | Field in-situ monitoring method of ammonia volatilization from farmland soils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106018670A true CN106018670A (en) | 2016-10-12 |
Family
ID=57104797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610505603.6A Pending CN106018670A (en) | 2016-07-01 | 2016-07-01 | Field in-situ monitoring method of ammonia volatilization from farmland soils |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106018670A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008065A (en) * | 2017-11-02 | 2018-05-08 | 潍坊中创生物科技有限公司 | Ammonia gas detection device and ammonia gas detection method |
| CN108226378A (en) * | 2018-01-30 | 2018-06-29 | 甘肃农业大学 | A kind of device of Laboratory Observation ammonium fertilizer volatile quantity |
| CN108709782A (en) * | 2018-07-12 | 2018-10-26 | 中国农业科学院农业环境与可持续发展研究所 | A kind of the soil ammonia volatilization capture device and computational methods of ridge tillage method planting site |
| 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 |
| 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 |
| CN114631412A (en) * | 2022-03-17 | 2022-06-17 | 江苏省农业科学院泰州农科所 | Organic fertilizer for reducing ammonia volatilization intensity of wheat field and distribution experiment method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN204177787U (en) * | 2014-10-14 | 2015-02-25 | 云南省烟草农业科学研究院 | A kind of in-site detecting device for potted plant soil ammonia volatilization |
| CN104407109A (en) * | 2014-12-12 | 2015-03-11 | 河南农业大学 | Soil ammonia volatilization in-situ monitoring device and detection method |
| CN204495627U (en) * | 2015-04-17 | 2015-07-22 | 长江水利委员会长江科学院 | Agricultural land soil ammonia volatilization in-situ monitoring device |
| CN205067468U (en) * | 2015-10-28 | 2016-03-02 | 中国农业科学院农业资源与农业区划研究所 | Test device of former position -finding soil ammonia volatilization |
| CN105424871A (en) * | 2015-12-10 | 2016-03-23 | 苏州国环环境检测有限公司 | Determination method for ammonia nitrogen in wastewater |
| CN205262971U (en) * | 2015-11-30 | 2016-05-25 | 中国水稻研究所 | Former position -finding device of paddy field ammonia volatilization |
-
2016
- 2016-07-01 CN CN201610505603.6A patent/CN106018670A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN204177787U (en) * | 2014-10-14 | 2015-02-25 | 云南省烟草农业科学研究院 | A kind of in-site detecting device for potted plant soil ammonia volatilization |
| CN104407109A (en) * | 2014-12-12 | 2015-03-11 | 河南农业大学 | Soil ammonia volatilization in-situ monitoring device and detection method |
| CN204495627U (en) * | 2015-04-17 | 2015-07-22 | 长江水利委员会长江科学院 | Agricultural land soil ammonia volatilization in-situ monitoring device |
| CN205067468U (en) * | 2015-10-28 | 2016-03-02 | 中国农业科学院农业资源与农业区划研究所 | Test device of former position -finding soil ammonia volatilization |
| CN205262971U (en) * | 2015-11-30 | 2016-05-25 | 中国水稻研究所 | Former position -finding device of paddy field ammonia volatilization |
| CN105424871A (en) * | 2015-12-10 | 2016-03-23 | 苏州国环环境检测有限公司 | Determination method for ammonia nitrogen in wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 南化工研究所: "《钙镁磷肥生产分析方法》", 31 December 1976 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008065A (en) * | 2017-11-02 | 2018-05-08 | 潍坊中创生物科技有限公司 | Ammonia gas detection device and ammonia gas detection method |
| CN108226378A (en) * | 2018-01-30 | 2018-06-29 | 甘肃农业大学 | A kind of device of Laboratory Observation ammonium fertilizer volatile quantity |
| CN108709782A (en) * | 2018-07-12 | 2018-10-26 | 中国农业科学院农业环境与可持续发展研究所 | A kind of the soil ammonia volatilization capture device and computational methods of ridge tillage method planting site |
| 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 |
| 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 |
| CN111579318B (en) * | 2020-06-09 | 2022-12-23 | 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 |
| CN114631412A (en) * | 2022-03-17 | 2022-06-17 | 江苏省农业科学院泰州农科所 | Organic fertilizer for reducing ammonia volatilization intensity of wheat field and distribution experiment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106018670A (en) | Field in-situ monitoring method of ammonia volatilization from farmland soils | |
| CN204495627U (en) | Agricultural land soil ammonia volatilization in-situ monitoring device | |
| Hou et al. | Seasonal variations of CH4 and N2O emissions in response to water management of paddy fields located in Southeast China | |
| Xu et al. | Improved water management to reduce greenhouse gas emissions in no-till rapeseed–rice rotations in Central China | |
| Li et al. | Effects of water-fertilizer coupling on tomato photosynthesis, yield and water use efficiency | |
| CN102326555B (en) | Paddy rice seed soaking agent and application thereof | |
| CN107966525B (en) | The method comprises the following steps of 13 CO 2 Method for quantifying pulsed marker plants | |
| CN103333944B (en) | Identification method of sweet potato soft rot resistance | |
| CN104407109B (en) | Soil ammonia volatilization in-situ monitoring device and assay method | |
| Xu et al. | Gaseous losses of nitrogen by ammonia volatilization and nitrous oxide emissions from rice paddies with different irrigation management | |
| CN103865216A (en) | Multifunctional degradable liquid mulch film and preparation method and usage method thereof | |
| CN105453787A (en) | Fertilization method of organic fertilizer in farmland and application thereof | |
| CN203758787U (en) | Ammonia volatilization absorbing device for living plants | |
| CN102308696B (en) | Method for regulating and controlling unbalance of phosphorus nutrient in protected vegetable soil | |
| CN105631757A (en) | System and method for automatically fertilizing according to change of crop growth matrix | |
| CN111272502A (en) | Collection device for exerting ammonia in field community and use method | |
| CN108709782A (en) | A kind of the soil ammonia volatilization capture device and computational methods of ridge tillage method planting site | |
| CN102279179B (en) | Device for researching crop canopy ammonia exchange in situ at farmland and monitoring method | |
| CN213603464U (en) | Agricultural is experimental with crop device of growing seedlings | |
| CN112110762A (en) | Water-soluble fertilizer and production process thereof | |
| CN110261532A (en) | The method that field on-spot study crop aerial part absorbs volatile nitrogen after the top dressing of farmland | |
| Peng et al. | Lasting effects of controlled irrigation during rice-growing season on nitrous oxide emissions from winter wheat croplands in Southeast China | |
| CN208399226U (en) | A kind of soil ammonia volatilization capture device of ridge tillage method planting site | |
| CN103959954B (en) | A kind of field regulating method improving facility salinization soil | |
| Zhao Zhi et al. | Yield and water use efficiency of pear trees under drip irrigation with different surface wetted percentages. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20161012 |