Nitrogen application method for balancing relation between supply and demand of nitrogen in intercropping of peas and corn

Abstract

The invention provides a nitrogen application method for balancing the relation between supply and demand of nitrogen in intercropping of peas and corn. The nitrogen application method comprises the steps as follows: S1, intercropping planting of corn and peas is performed in the line number ratio of (2-3):4, and the line width ratio of corn belts to pea belts is (8-11):8; basic pure nitrogen is applied to the corn belts and the pea belts, pure phosphorus is applied, turning is performed after fertilization, and the corn belts are covered with mulching films; S2, pure nitrogen is dressed on the corn belts and the pea belts for the first time at the stem elongation stage of corn; S3, pure nitrogen is dressed on the corn belts and the pea belts for the second time at the flare opening stageof corn; S4, pure nitrogen is dressed on the corn belts for the third time 10 days after blooming of corn, and no fertilizer is applied to the pea belts. Nitrogen is supplied at different stages and belts according to nitrogen demand laws of the corn and the peas, interspecific competition of corn and peas is regulated, and the problem of imbalance between supply and demand of nitrogen in traditional production of intercropping of peas and corn is effectively solved; meanwhile, by regulation of interspecific competition and complementation of an intercropping system, the synergistic utilization of nitrogen is promoted, the utilization rate of nitrogen fertilizer is increased, and the yield is increased.

Description

technical field

[0001] The invention relates to a nitrogen application method in the intercropping process of corn and pea, in particular to a nitrogen application method for balancing the nitrogen supply and demand relationship between corn and pea intercropping. Background technique

[0002] Intercropping is the essence of my country's agriculture. It has obvious advantages in many aspects such as improving land utilization, increasing crop productivity, and optimizing agricultural resource utilization. Especially the grass / bean intercropping composed of gramineous crops and leguminous crops can significantly promote The play of complementary effects between species improves the sustainability of crop production. Nitrogen is an essential nutrient element in the growth and development of crops, and its contribution rate in increasing grain production is as high as about 45%.

[0003] However, the traditional production concept and management experience pay more attention to...

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