Southern fallow period rice field nitrogen fixation and emission reduction method

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...

AI Technical Summary

Problems solved by technology

At present, there is no method basis for nitrogen fixation and emission reduction in paddy fields during the fallow period, and there is no specific implementation method for nitrogen fixation and emission reduction based on residual nutrients in rice fields.

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