Method for deepening and fertilizing middle-low yield argil rice field plough layer

Abstract

The invention discloses a method for deepening and fertilizing a middle-low yield argil rice field plough layer in the hilly areas of south China. The technology for direct wheat straw field return for soil improvement, the technology for applying organic fertilizer, curing the plough layer and improving soil fertility, the technology for deeply ploughing soil to transform the bad soil structure of middle-low yield argil, the technology for applying a soil conditioner to neutralizing hazardous substances, the technology for rice optimization fertilizer application and nitrogenous fertilizer operation management for soil nutrient balance, the technology for improving the soil nutrient deficiency condition and recovering soil fertility through scientific crop rotation and the like are integrated.

Description

technical field [0001] The invention relates to the technical field of farmland soil improvement and soil fertilization, in particular to a method for making the cultivated layer of middle and low-yield white clay paddy fields deep and fertile. Background technique [0002] White soil is one of the five low-yield paddy soil types in southern my country, with a total area of ​​more than 10 million mu nationwide, mainly distributed in the south of Qinling-Huaihe River, the middle and lower reaches of the Yangtze River and slightly south of Anhui, Jiangsu, Zhejiang, Hubei and Henan provinces. In vast areas, the distribution of white soil soil is wider and the area is larger. Baitu people call it "Chengbaitu", "Dianban soil", "Yellow Baitu", "Qingbaitu", "Horse Gantu", etc. It mainly originated from the parent material of Xiashu loess, and the process of producing white soil is mainly the soil Affected by long-term leaching, rinsing, and lateral seepage of surface irrigation, dr...

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Problems solved by technology

[0004] There are many obstacle factors in the white soil with shallow plow layer, which has a series of bad properties: low clay content, high silt content, silt-like accumulations, that is, white soil layer, imbalanced sand-stick ratio, lack of nutrients, poor soil fertility, The content of organic matter and available nitrogen, phosphorus and potassium is low, and trace elements such as zinc are deficient; the substitution amount is small, and the capacity of fertilizer retention and water storage is low; Weak self-regulation ability and poor stress resistance; weak soil heat preservation ability, tight soil mouth, poor soil structure, weak knot holding capacity, easy to fix pulp and harden, short plowing period, and difficult to plow when the soil moisture is not good. Difficult to rake. If the transplanting is not timely, it will be very difficult to transplant the seedlings or do other farm work, which will easily delay the farming time.

When planting rice, the seedlings grow slowly and have few tillers; when planting dry crops, the soil is easy to harden after rain, and there are often hard shells of about 0-1.5 cm on the ground surface, which makes it difficult for seedlings to unearth and the emergence rate is low

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