Southern fallow period rice field nitrogen fixation and emission reduction method

A technology in the fallow period and paddy field, which is applied in the field of nitrogen fixation and emission reduction in rice fields during the fallow period in the south, which can solve the problems of lack of method basis and no implementation method of nitrogen fixation and emission reduction.

Pending Publication Date: 2021-02-05
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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Problems solved by technology

At present, there is no method basis for nitrogen fixation and emission reduction in paddy fields during the fallow period, an...

Method used

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  • Southern fallow period rice field nitrogen fixation and emission reduction method
  • Southern fallow period rice field nitrogen fixation and emission reduction method
  • Southern fallow period rice field nitrogen fixation and emission reduction method

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Embodiment 1

[0037] This embodiment was carried out in the paddy fields during the fallow period of the Taoyuan Agricultural Ecological Experimental Station of the Chinese Academy of Sciences. The field design is a completely random grouping design, with 3 repeated blocks, each with an area of ​​33.0m 2 .

[0038] according to figure 1 It can be seen that a method for nitrogen fixation and emission reduction in paddy fields during the southern fallow period includes two aspects: biological measures and biomass improvement management measures;

[0039] Among them, biological measures include:

[0040] (1) Cultivation of local dominant weeds: the dominant weeds in this test area are Gramineae weeds A. chinensis, and a dominant population has been formed in the paddy field during the fallow period. Therefore, what relates to in this embodiment is the maintenance method of the dominant population. When the seeds are mature, the weed seeds are harvested by rice mechanical harvesting or manua...

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Abstract

The invention discloses a southern fallow period rice field nitrogen fixation and emission reduction method. The southern fallow period rice field nitrogen fixation and emission reduction method comprises two aspects including biological measures and biomass improvement management measures, wherein the biological measures comprise two steps of local dominant weed cultivation and rice stubble regeneration, and the biomass improvement management measures comprise four steps of field moisture subsection management, phosphate fertilizer regulation and control, field management and spring ploughingperiod regulation and control. The core of the nitrogen fixation and emission reduction method provided by the invention is that nitrification and denitrification substrates are reduced by absorbingavailable nitrogen in rice field soil through weeds and regeneration of rice stubbles in a fallow period, so that the purpose of N2O emission reduction is achieved. The nitrogen fixation and emissionreduction method provided by the invention is easy to implement, low in investment, capable of being locally used, and capable of saving labor and transportation force, solves the problems of high residual nitrogen content and large greenhouse gas N2O emission of the rice field in the fallow period, and achieves the positive effects of nitrogen fixation and emission reduction of the rice field inthe fallow period.

Description

technical field [0001] The invention belongs to the technical field of nitrogen fixation and emission reduction, and in particular relates to a method for nitrogen fixation and emission reduction in paddy fields during the southern fallow period. Background technique [0002] my country is the second largest rice-growing country in the world, and the rice planting area accounts for 27% of the world's planting area. Due to the special water management mode and fertilization characteristics of rice fields, the greenhouse gas emissions of rice fields have received extensive attention. In the process of rice production, there are problems such as excessive application of nitrogen fertilizer and low nitrogen fertilizer use efficiency (the utilization efficiency of the current season is less than 35%), which directly leads to the high content of active nitrogen in the paddy field soil (such as ammonium nitrogen and nitrate nitrogen), which is Paddy N 2 O emission provides a suff...

Claims

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Application Information

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IPC IPC(8): A01G22/22A01G20/00A01B79/02
CPCA01G22/22A01G20/00A01B79/02
Inventor 陈安磊陈春兰张文钊侯海军刘毅刘飞盛荣秦红灵
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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