Winter wheat-summer corn rotation one-time fertilizing emission reduction method

Abstract

The invention provides a winter wheat-summer corn rotation one-time fertilizing emission reduction method, and belongs to the technical field of farm fertilizing. The method considers the nutriment demand and allocation of two crops in one year. An organic fertilizer and a slow controlled-releasing nitrogenous fertilizer are mixed to be applied to winter wheat during N application of the winter wheat; and the fertilizing manner includes: smashing all the corn straw, returning the smashed straw to soil, performing rotary tillage, and applying the mixed fertilizer to the soil once. A slow controlled-releasing nitrogenous fertilizer provides N elements to summer corn, and is applied to the soil once with corn sowing on the primes of applying the sufficient organic fertilizer to the winter wheat. The times of field fertilizing is 2, labor forces can be greatly saved, soil disturbance is reduced, the emission of N2O is reduced, the use amount of the nitrogenous fertilizer is reduced by 14-25%, the yield of the two crops is increased by 400-500 kg / hm<2>, the average income is increased by 1400-1600 yuan / hm<2>, the fertilizer utilization rate is improved by 25-35%, labors can be saved by 30-45, and the emission of N2O is lowered by 25-35%.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilization, and relates to a wheat and corn fertilization method, in particular to a winter wheat-summer corn rotation system "one-time fertilization" emission reduction method. Background technique [0002] The North China Plain is the main grain production area in my country, with winter wheat / summer corn rotation as the main planting mode, and its total output is about 40% and 28% of the national total (Chen Baiming, 2003). However, In order to pursue high yield, excessive fertilization is serious, especially Nitrogen fertilizer . The survey shows that the annual nitrogen fertilizer consumption in this area exceeds 500kg N / hm 2 , while the average output is 11.5t / hm 2 (Ju Xiaotang et al., 2002; Cui Zhenling, 2005), far exceeding the nitrogen requirement for the average yield of winter wheat / summer maize (Zhao Rongfang et al., 2009). On the one hand, nitrogen fertilizer use efficie...

AI Technical Summary

Problems solved by technology

However, with the rapid advancement of rural urbanization, the labor force continues to move out, and the price of food is not high , No topdressing or topdressing methods are not used in production Reasonable present Fertilizer utilization rate is still low, which not only affects the stability and improvement of grain production, but also aggravates environmental pollution.

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