CN113419047B - Method for measuring soil respiration of film-covered corn field - Google Patents
Method for measuring soil respiration of film-covered corn field Download PDFInfo
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- CN113419047B CN113419047B CN202110721008.7A CN202110721008A CN113419047B CN 113419047 B CN113419047 B CN 113419047B CN 202110721008 A CN202110721008 A CN 202110721008A CN 113419047 B CN113419047 B CN 113419047B
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- 238000004158 soil respiration Methods 0.000 title claims abstract description 30
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 title claims abstract description 20
- 235000002017 Zea mays subsp mays Nutrition 0.000 title claims abstract description 20
- 235000005822 corn Nutrition 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 240000008042 Zea mays Species 0.000 title claims description 18
- 239000002689 soil Substances 0.000 claims abstract description 72
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 13
- 238000003973 irrigation Methods 0.000 claims abstract description 5
- 230000002262 irrigation Effects 0.000 claims abstract description 5
- 239000002390 adhesive tape Substances 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003337 fertilizer Substances 0.000 claims 1
- 239000002362 mulch Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 4
- 230000004720 fertilization Effects 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000012625 in-situ measurement Methods 0.000 abstract description 3
- 241000209149 Zea Species 0.000 abstract 2
- 239000012528 membrane Substances 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003556 assay Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010792 warming 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
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- 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
- G01N33/24—Earth materials
- G01N33/245—Earth materials for agricultural purposes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
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- Engineering & Computer Science (AREA)
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- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a membrane covered corn field soil respiration measuring method, which comprises the following steps: 1) a soil ring matched with an LI-8100A breathing instrument is driven into a farmland: when laying a film covering part, directly driving soil rings into soil at a selected position, damaging the mulching film by the soil rings, covering the film again, cutting a mulching film which is larger than the area of the soil rings and has the same property as an original mulching film, removing the original mulching film, and adhering a new mulching film and the original mulching film in the farmland by using a homochromy adhesive tape; drilling new holes on the newly laid mulching film according to the hole opening rate; 2) and (3) respiration measurement: measuring soil respiration every 7-10 days, and measuring before and after irrigation and fertilization, wherein the measuring time is 8:00-20:00, measured every 2 hours. The method has the advantages of simple operation, high accuracy, in-situ measurement and simple preparation work, and can easily obtain data through the portable gas analyzer; the method can effectively measure the soil respiration rate of the film covered corn field in the whole growth period and daily change.
Description
Technical Field
The invention relates to the technical field of soil respiration determination, in particular to a film-covered corn field soil respiration determination method.
Background
CO 2 The emission is the main cause of global warming, C0 in farmlands 2 The discharge amount is huge. Soil respiration is mainly caused by respiration of animals and plants in the soil and respiration of microorganisms. The measurement of soil respiration is an unavailable part of the study of carbon budget in agricultural fields. The accurate determination of farmland soil respiration also has important significance for carbon sequestration and emission reduction of an ecosystem. The film covering is popularized in arid and semi-arid regions as an important water saving measure, and is particularly important for measuring the soil respiration of the film covered farmland. In arid regions, the corn fields are covered with strip-shaped mulching films, so that accurate measurement of soil respiration at both mulching films and bare soil positions is required.
The existing soil respiration measuring technology is complex in operation, tedious in preparation work, incapable of acquiring data in real time, easy to cause soil disturbance, low in accuracy and often limited by test conditions. Soil respiration measurement in mulching farmland has always been difficult.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide the method for measuring the respiration of the soil in the film covered corn field, which has the advantages of simple operation, high accuracy, in-situ measurement and simple preparation work, and can easily obtain data through a portable gas analyzer; the method can effectively measure the soil respiration rate of the film covered corn field in the whole growth period and daily change.
In order to solve the technical problems, the invention adopts the following technical scheme:
the method for measuring the soil respiration of the film covered corn field is characterized by comprising the following steps:
1) a soil ring matched with an LI-8100A respirator is driven into a farmland: when laying a film covering part, directly driving soil rings into soil at a selected position, damaging the mulching film by the soil rings, covering the film again, cutting a mulching film which is larger than the area of the soil rings and has the same property as an original mulching film, removing the original mulching film, and adhering a new mulching film and the original mulching film in the farmland by using a homochromy adhesive tape; drilling new holes on the newly laid mulching film according to the hole opening rate;
directly selecting a representative position from the bare soil position and driving a soil ring in advance;
2) and (3) respiration measurement: the soil respiration is measured every 7-10 days, and the measuring time is 8:00-20:00, every 2 hours;
before each measurement, the LI-8100A portable soil respirator host needs to be started and preheated in advance, the soil respirator air chambers are placed on the soil rings during the measurement, the soil rings are moved to one another after the measurement is finished, and the sequence of the soil rings measured each time is kept consistent; and after a time point is measured, the host machine of the respirator is turned off in time to keep the electric quantity, and the air chamber is removed from the soil rings, so that all the soil rings are in a real environment.
Further, the step 1 is advanced by 1 to 2 days;
further, in the step 1, at least 3 soil rings are respectively arranged at the positions of bare soil and the position of a covering film;
further, the integrity of the mulching film is checked before the determination in the step 2, and the position is changed in advance to form a soil ring after the mulching film is damaged or raining is performed or the farmland is irrigated;
furthermore, when the respiration is measured in the step 2, the influence of irrigation and fertilization on the soil respiration is large, and the measurement should be carried out.
The invention has the advantages of simple operation, high accuracy, in-situ measurement, simple preparation work and capability of easily acquiring data through a portable gas analyzer; the method can effectively measure the soil respiration rate of the film covered corn field in the whole growth period and daily change.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a method for measuring soil respiration in a film-covered corn field provided by the invention.
Description of reference numerals:
the soil is covered with a film 1, bare soil 2, a soil ring 3, a new hole 4 and a new film 5.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the method for measuring the soil respiration of the mulching film 1 corn field comprises the following steps:
1) the soil ring 3 matched with the LI-8100A breathing instrument is driven into the farmland 1-2 days in advance, the soil disturbance caused by ring driving is reduced, the soil ring 3 is repeatedly arranged at least 3 times at the positions of the bare soil 2 and the film covering 1, the representativeness is increased,
when the mulching film 1 is laid, firstly, a position is selected to directly drive the soil ring 3 into the soil, the mulching film is damaged by the soil ring 3, the mulching film 1 needs to be re-laminated, a mulching film which is larger than the area of the soil ring 3 and has the same property as that of the original mulching film needs to be cut, the original mulching film is removed, and the new mulching film and the original mulching film in the farmland are adhered by using the same-color adhesive tape; because the farmland mulching film is incomplete, carbon dioxide generated by soil respiration can be diffused into the air through the sowing holes, and new holes 4 are drilled in the newly laid mulching film according to the hole opening rate;
the position of the bare soil 2 can be directly selected to be at least 3 representative positions to be driven into the soil ring 3 in advance;
2) measuring the soil respiration every 7-10 days, and measuring the soil respiration when the water irrigation and fertilization have large influence on the soil respiration; the assay time was 8 a: 00-20:00, every 2 hours; the flux of carbon dioxide output by the instrument can be converted according to the requirement;
before each measurement, the LI-8100A portable soil respirator host needs to be started and preheated in advance, and during the measurement, the soil respirator air chamber is placed on the soil ring 3, and after the measurement, one soil respirator air chamber moves to the other soil respirator air chamber. The sequence of the soil rings 3 is kept consistent every time;
after a time point is measured, the host of the respirator is shut down in time to keep the electric quantity, and the air chamber is moved away from the soil rings 3, so that all the soil rings 3 are in a real environment;
and (4) checking the integrity of the mulching film before measurement, and timely replacing the position in advance and looping the mulching film again after the mulching film is damaged or is irrigated and rained.
The method is designed to determine the soil respiration of the positions of bare soil 2 and film 1 by using a dynamic air chamber method, and the daily change of the soil respiration of the farmland is determined by using a portable infrared gas analyzer LI-8100A soil carbon flux automatic monitoring system; the arrangement of the soil ring 3 can reduce the disturbance of the experimental field as much as possible; when the soil ring 3 is arranged at the position of the mulching film 1, the mulching film is arranged again, holes are formed, and the mulching film is attached to the ground while the integrity of the mulching film is ensured; measuring the whole growth interval of the corn for 7-10 days, and measuring before and after irrigation and fertilization; one round of assay was performed every 2 hours on the daily scale from 8:00 to 20: 00.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. The method for measuring the soil respiration of the film covered corn field is characterized by comprising the following steps:
1) a soil ring matched with an LI-8100A breathing instrument is driven into a farmland: when laying a film covering part, directly driving soil rings into soil at a selected position, damaging the mulching film by the soil rings, covering the film again, cutting a mulching film which is larger than the area of the soil rings and has the same property as an original mulching film, removing the original mulching film, and adhering a new mulching film and the original mulching film in the farmland by using a homochromy adhesive tape; drilling new holes on the newly laid mulching film according to the hole opening rate;
directly selecting a representative position from the bare soil position and driving a soil ring in advance;
2) and (3) respiration measurement: and (3) measuring the soil respiration every 7-10 days, wherein the measuring time is 8:00-20:00, every 2 hours;
before each measurement, a main machine of the LI-8100A portable soil respirator needs to be started up in advance for preheating, during the measurement, air chambers of the soil respirator are placed on soil rings, after the measurement, one soil ring moves to the other soil ring, and the sequence of the soil ring measurement is consistent; and after a time point is measured, the host machine of the respirator is turned off in time to keep the electric quantity, and the air chamber is removed from the soil rings, so that all the soil rings are in a real environment.
2. The method for measuring soil respiration in a film covered corn field according to claim 1, wherein the step 1 is advanced by 1 to 2 days.
3. The method of claim 2, wherein in step 1 at least 3 soil rings are placed at each of the bare soil and mulch locations.
4. The method for measuring the respiration of the soil in the film covered corn field according to claim 3, wherein the integrity of the film covered corn field is checked before the measurement in the step 2, and the soil ring is replaced in advance when the film covered corn field is damaged or the film covered corn field is irrigated by strong rainfall.
5. The method for measuring the respiration of the soil in the film covered corn field according to claim 4, wherein in the step 2, the water irrigation and the fertilizer application have a large influence on the respiration of the soil and are applied for measurement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110721008.7A CN113419047B (en) | 2021-06-28 | 2021-06-28 | Method for measuring soil respiration of film-covered corn field |
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|---|---|---|---|
| CN202110721008.7A CN113419047B (en) | 2021-06-28 | 2021-06-28 | Method for measuring soil respiration of film-covered corn field |
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| CN113419047A CN113419047A (en) | 2021-09-21 |
| CN113419047B true CN113419047B (en) | 2022-08-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101601340B (en) * | 2009-07-13 | 2012-05-23 | 中国科学院新疆生态与地理研究所 | Film covering method for preventing and controlling salt accumulation on salt water irrigated soil surface layer and rainfall salt damage |
| CN101949919A (en) * | 2010-08-17 | 2011-01-19 | 中国热带农业科学院橡胶研究所 | Rubber forest soil respiration measuring method |
| CN104145756B (en) * | 2014-08-22 | 2016-04-20 | 静宁县静丰农牧果蔬科技有限公司 | Dry Land Orchard covers black and white dichroic micropore film drip irrigation with catchment of rainfall method |
| CN109348772B (en) * | 2018-12-12 | 2021-09-28 | 中国农业科学院农业资源与农业区划研究所 | Horizontal alternate planting method for mulching films and film spaces in saline-alkali soil |
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