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Method for controlling farmland soil nitrogen non-point source pollution with carbon

A non-point source pollution and soil nitrogen technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as unsatisfactory effects of nitrogen non-point source pollution, crop yield reduction, etc.

Inactive Publication Date: 2013-09-25
INST OF AGRI ENVIRONMENT & RESOURCES YUNNAN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the existing control technology of farmland nitrogen non-point source pollution, which is mainly carried out from the aspects of reducing nitrogen input or changing nitrogen form. The risk of yield reduction and other defects and deficiencies, the purpose is to provide a method to control farmland soil nitrogen non-point source pollution with carbon without affecting the normal growth of crops

Method used

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  • Method for controlling farmland soil nitrogen non-point source pollution with carbon
  • Method for controlling farmland soil nitrogen non-point source pollution with carbon
  • Method for controlling farmland soil nitrogen non-point source pollution with carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: The effect of increasing soil carbon on controlling the risk of farmland soil nitrogen non-point source pollution

[0043] (1) Test soil, test crops and carbon source materials

[0044] Soil for testing: red soil where rice has been planted for many years, which belongs to red soil paddy soil.

[0045] Test crops: rice.

[0046] Carbon source material: Cow dung. The tested cow dung was obtained from local farmers (it can also be purchased through commercial channels). The carbon content in the cow dung was determined by the potassium dichromate volumetric method, and the nitrogen content in the cow dung was determined by the Kjeldahl method. The measurement results: in mass fraction Calculated, the carbon content of cow dung is 8.4%, and the nitrogen content is 0.3%.

[0047] (2) Calculation of soil initial carbon storage, nitrogen storage and carbon-nitrogen ratio:

[0048] Before the test, measure the soil bulk density, soil pH, soil initial nitrogen co...

Embodiment 2

[0104] Example 2 Effect of soil nitrogen reduction on controlling farmland soil nitrogen non-point source pollution risk

[0105] (1) Test soil, test crops and nitrogen source materials

[0106] Soil for testing: red soil paddy soil.

[0107] Test crops: garlic (garlic variety: Wenjiang Hongqixing, Sichuan.)

[0108] Nitrogen source material: urea (N, 46%).

[0109] (2) Calculation of soil initial carbon storage, nitrogen storage and carbon-nitrogen ratio:

[0110] Before the test, the soil bulk density, soil pH, soil initial nitrogen content and soil initial carbon content in the 0-30cm plow layer of farmland were measured according to conventional methods (the measurement method was the same as in Example 1), and the initial soil carbon storage, soil initial Calculation of nitrogen storage and initial soil carbon-nitrogen ratio.

[0111] Soil bulk density B=1.37t / m 3 , farmland area R=10000m 2 , C N =0.247%, C C =2.34%. Soil cultivation layer thickness L=0.3m.

[0...

Embodiment 3

[0137] Example 3 Effect of soil carbon increase and nitrogen reduction on controlling the risk of farmland soil nitrogen non-point source pollution

[0138] (1) Test soil, test crops, carbon source materials, nitrogen source materials

[0139] Test crops: rice.

[0140] Soil for testing: red soil paddy soil.

[0141] Carbon source material: cow dung, the cow dung for testing is taken from local farmers, the carbon content in cow dung is determined by the potassium dichromate volumetric method, the nitrogen content in cow dung is determined by the Kjeldahl method, and the measurement results: in terms of mass fraction , the carbon content of cow dung is 8.4%, and the nitrogen content is 0.3%. Cow manure is also commercially available.

[0142] Nitrogen source material: Urea (N, 46%) (chemical fertilizer).

[0143] (2) Calculation of soil initial carbon storage, nitrogen storage and carbon-nitrogen ratio:

[0144] Before the test, the soil bulk density, soil pH, soil initia...

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Abstract

The invention discloses a method for controlling farmland soil nitrogen non-point source pollution with carbon. The method includes increasing the carbon content of the soil when the 0-30cm plough layer soil initial total nitrogen content is equal to or more than 1.0g / kg and less than 2.0g / kg and C (carbon)0 / N (nitrogen)0 is less than 10, decreasing the nitrogen content of the soil when the 0-30cm plough layer soil initial total nitrogen content is equal to or more than 2.0g / kg and equal to or less than 3.0g / kg and the C0 / N0 is less than 10, increasing the carbon content and decreasing the nitrogen content of the soil when the 0-30cm plough layer soil initial total nitrogen content is more than 3.0g / kg and the C0 / N0 is less than 10, and increasing the carbon content and the nitrogen content of the soil when the 0-30cm plough layer soil initial total nitrogen content is less than 1.0g / kg and the C0 / N0 is less than 10. According to the method, the nitrogen concentration of nitrate and the like in the soil, total nitrogen in farmland surface water, inorganic nitrogen and nitrate radical in percolating water in 100cm depth of the soil water can be reduced greatly under the condition of ensuring the normal growth of crops.

Description

technical field [0001] The invention relates to the technical field of agricultural environmental protection, in particular to a carbon-based nitrogen control method for controlling farmland soil nitrogen non-point source pollution. Background technique [0002] The non-point source pollution of farmland has become an important environmental problem in my country. The loss of nitrogen and phosphorus in farmland is an important reason for water eutrophication. The control of nitrogen non-point source pollution in farmland soil in the prior art mainly starts with reducing nitrogen input or changing the form of nitrogen, resulting in defects and deficiencies such as unsatisfactory control of nitrogen non-point source pollution and the risk of crop yield reduction. [0003] At present, the research on soil carbon is rarely applied to the control of non-point source pollution of nitrogen, and the research uses soil carbon management to find nitrogen management measures that coord...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 雷宝坤刘宏斌陈安强毛妍婷翟丽梅王应学续勇波鲁耀杜彩艳段宗颜潘艳华王洪媛陈拾华
Owner INST OF AGRI ENVIRONMENT & RESOURCES YUNNAN ACAD OF AGRI SCI
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