Method for fertility improvement of full-cultivation layer in double-season rice field

Abstract

The invention belongs to the technical field of fertility improvement and tillage of soil, and discloses a method for fertility improvement of a full-cultivation layer in a double-season rice field. The method comprises the following steps that late rice is subjected to dry deep tillage in winter, and rice straw is pressed back and returned to the field; after harrowing, a ditching machine is adopted for forming surrounding ditches and cross ditches in the rice field, and astragalus sinicus is immediately sowed; early rice is subjected to rotary tillage, astragalus sinicus is returned to the field, a large rotary tiller is utilized for returning astragalus sinicus to the field, rotary tillage is conducted 2-3 times, and the rotary tillage depth is 15 cm; late rice is free of tillage, earlyrice straw is used for coverage and returned to the field, after the early rice is harvested, ploughing is not needed, a deep-tillage-free soil conditioner is applied for loosening the soil, weeds atthe side of the field are removed, pressing marks of a harvester are flattened, a base fertilizer is applied, and then seedlings are transplanted. By means of the method, fertility improvement of thefull-cultivation layer in the rice field is facilitated through rotation tillage on the soil; after the straw and green fertilizer are cooperatively returned to the field, the quality of the fertility improvement of the rice field is improved; the input amount of chemical fertilizer is reduced, and the resource utilization benefit rate is increased; the yield of rice is increased, and the economic benefit is remarkable.

Description

technical field [0001] The invention belongs to the technical field of soil fertilization and cultivation, and in particular relates to a method for fertilizing a full plow layer in a double-cropping paddy field. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] The double-cropping rice area is an important grain-producing area in my country and has made great contributions to national food security. However, due to the long-term use of light agricultural machinery and tools in the double-cropping paddy fields, the sharp decrease in the planting area of ​​green manure in winter, the reduction in the application of organic fertilizers, the burning of a large number of early rice straws, and the natural retention of late rice straws to the field, resulting in nutrient leaching, etc., the relationship between paddy field fertilizer and soil The problems in farming are prominent, leading to the decline of ...

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Problems solved by technology

[0007] (1) In the prior art, the paddy field in the double-cropping rice area adopts a plate field to spend the winter in winter, and the straw is naturally placed in the field, and the nutrient is leached and lost by the rain, which is a serious waste; at the same time, there is a lack of high-quality organic fertilizer sources for fertilization; early and late rice are used for a long time. Rotary plowing with agricultural machinery and tools leads to a shallower plow layer and lower water and fertilizer retention capacity

[0008] (2) In the prior art, some farmers have switched to large-scale agricultural machinery to plow the fields, and the continuous use of hydroponics and water rectification methods is easy to break the plow bottom layer, resulting in too deep plow layer and soil structure damage

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