Soil conditioner for acidic rice field and use method of soil conditioner

Abstract

The invention provides a soil conditioner for an acidic rice field and a use method of the soil conditioner. The soil conditioner at least comprises an ingredient A; the ingredient A is formed by conducting mixing, extruding and forming on the following raw materials by weight: 25 to 70 parts of plant ash, 20 to 35 parts of charcoal, 20 to 35 parts of paste lime, 1 to 15 parts of a botanical organic fertilizer; the pH value of the mixture is 8 to 12; the content of organic matters is larger than or equal to 10 wt%; the content of Ca calculated by CaCO3 is larger than or equal to 20 wt%; the content of K calculated by K2O is larger than 4 wt% and smaller than 8 wt%; the content of moisture is smaller than or equal to 28 wt%; the application dose of the ingredient A per mu is 80 to 160 kg; the soil conditioner is applied uniformly during ground making and before crop sowing.

Description

technical field [0001] The invention relates to a soil conditioner and its application method, in particular to an acid paddy field soil conditioner and its application method. Background technique [0002] The soil of paddy fields in southern my country is mostly acidic. Due to improper management measures such as fertilization, the acid rain has accelerated the acidification process. At present, in the process of rice planting, traditional agricultural measures such as lime, pyrotechnic ash, and organic fertilizer are basically missing. Long-term and large-scale application of chemical fertilizers has caused the imbalance of soil nutrients in cultivated land, and the trend of soil acidification has accelerated. The national acidic cultivated land area (pH<5.5) has risen from 7% 30 years ago to 18%. Take Hunan Province as an example: Compared with the second soil census in 1980, the pH value (average value) of the cultivated land has dropped from 6.4 to 5.9, and the var...

AI Technical Summary

Problems solved by technology

Soil acidification aggravates soil compaction, making it difficult for roots to stretch, weak rooting force, difficulty in slowing down seedlings, easy to form old stiff seedlings, poor root development, reduced absorption function, weak growth, and reduced yield

Soil acidification aggravates the waste of pesticides: the growth of plants in acidified soil is weakened, the ability to resist diseases is reduced, and it is easy to be infected by diseases, so the amount of pesticides has to be increased; soil acidification not only causes 70% of nitrogen to be lost, but also 60-80% of nitrogen. Phosphorus is easy to form insoluble substances and cannot be absorbed. Most of the medium and trace elements have a low absorption and utilization rate, and the fertilizer loss is serious. The fertilizer utilization rate is less than 30%. The acidity leads to weak root growth and low nutrient absorption and utilization rate. As a result, although a large amount of chemical fertilizers are used, the crops grow slowly, have many di...

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