Method for preventing and controlling nitrate leaching loss of soil in dry farming land of North China Plain by utilizing mode of interplanting corn and soybean

Abstract

The invention discloses a method for preventing and controlling nitrate leaching loss of soil in a dry farming land of North China Plain by utilizing a mode of interplanting corn and soybean. Aiming at the problems that a dry farming land of the North China Plain is rainy and hot synchronously, the fertilizing amount of single culture of corn is large, the residual quantity of nitrate nitrogen in soil is large, the risk of nitrogen leaching loss is very high, the method effectively controls nitrate leaching loss of soil by interplanting corn and soybean summer sowing season. According to the invention, appropriate irrigation is performed during sowing; open type management is adopted during the growing period of crops; optimized fertilization is performed to corn bands and soybean bands respectively; the fertilizing amount is subjected to the local recommended fertilizing amount of corresponding crops, and fertilizer is applied between rows of corresponding crops; and during the critical growing period of the crops, if rain water is sufficient, irrigation is not performed, and if no rain comes or rain water is insufficient, appropriate irrigation is performed. The method can be implemented to effectively prevent and control the risk of nitrate pollution of a dry farming land of North China Plain, and has relatively remarkable economic benefits and environmental benefits.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and in particular relates to a method for preventing and controlling nitrate leaching from dry field soil in the North China Plain by using the intercropping mode of corn and soybeans. The method reduces nitrogen fertilizer application by intercropping corn and soybeans, and efficiently utilizes residual soil from previous crops Nutrients and exogenous nutrients, reducing the risk of nitrate pollution in groundwater. Background technique [0002] At present, more and more people in the world are concerned about the quality of surface water and groundwater, and the pollution of nitrate to groundwater has attracted special attention in many countries (Hu Guochen, Zhang Qingmin, Wang Zhong, etc. Research on the prevention and control of nitrate nitrogen pollution in groundwater[J ].Agricultural Environmental Protection, 1999, 18(5): 228-230; Xing Guangxi, Shi Shulian, Du Lijuan, etc. Status of...

AI Technical Summary

Problems solved by technology

The long-term single crop rotation mode of winter wheat and summer maize, especially the long-term monoculture of maize in summer, reduces the diversity of farmland species and habitats, weakens the overall stress resistance and self-regulation function of the agro-ecosystem, and also brings soil quality degradation and land degradation. The low comprehensive utilization rate of solar and thermal resources has seriously affected the farmland environment and economic benefits (You Minsheng, Liu Yufang, Hou Youming. Farmland Biodiversity and Integrated Pest Management[J]. Ecological Journal, 2004, 24(1) :117-122.)

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