Method for improving degraded plough layer in wheat-corn double-cropping area

Abstract

The invention provides a method for improving a degraded plough layer in a wheat-corn double-cropping area, and belongs to the technical field of agricultural soil improvement. The improvement methodcombining rotary tillage and improvement special charcoal / organic improvement fertilizer quantitative returning has a remarkable improvement effect on the degraded plough layer of high-strength utilization cultivated land in the wheat-corn double-cropping area, after improvement, the soil physical property of the degraded plough layer is remarkably improved, the plough layer structure is restored,and the soil organic carbon bank level is remarkably improved. The improved plough layer structure with proper tightness can improve the water permeability and air permeability of soil, promote croproot system pricking and effectively promote the annual yield of wheat and corn in the double-cropping area of one year to be remarkably increased.

Description

technical field [0001] The invention relates to the technical field of agricultural soil improvement, in particular to a method for improving degraded plow layers in wheat and jade double-cropping areas. Background technique [0002] The North China Plain is the main grain-producing area in my country. It is dominated by the two-crop cropping pattern of wheat and corn all the year round. It is a typical wheat-corn crop rotation area in China. In recent years, due to the long-term high-intensity and overloaded use of farmland in this area, combined with long-term single shallow tillage, less organic matter returning to the field, and excessive application of chemical fertilizers, the plow layer has become shallower and compacted year by year, and the bottom of the plow has moved up. The degradation of plow layer, such as lower utilization rate and lower soil quality, has become increasingly prominent, and has become a new problem restricting the sustained high and stable yiel...

AI Technical Summary

Problems solved by technology

The long-term farming system with less tillage and no-tillage has brought shallower and harder plowed layers, moving up the plow layer, and serious soil compaction, which seriously affects the turnover of nutrients and water in the plowed layer. The long-term high level and the low input of soil organic matter lead to the decline of soil quality and the obvious trend of degradation of the cultivated layer

The most direct impact of the degradation of the plow layer of the high-intensity utilization of wheat and jade cropland is the decline of soil physical properties, such as shallow plow layer, increased bulk density, decreased porosity, unreasonable aggregate structure, and decreased air and water permeability. The structure of the plow layer is tight, the surface soil is compacted, the growth of crop roots is hindered, the utilization rate of soil water and fertilizer is reduced, and the yield is reduced

The decline in the quality of the plow layer not only affects the sustainable production capacity of agriculture, but also increases the risk of agricultural non-point source pollution. Therefore, there is an urgent need for improved methods suitable for high-intensity use of degraded plow layers in the wheat and jade double-cropping areas of the North China Plain.

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