Method for improving quality and efficiency of tropical sandy farmland soil

Abstract

The invention provides a tropical sandy farmland soil composition which is prepared from the following raw materials in percentage by weight: 55 to 65 percent of earthworm culture, 8 to 12 percent of complex microbial inoculants and the balance of fine ground phosphate rock, and the complex microbial inoculants are prepared by mixing paecilomyces lilacinus, bacillus subtilis, trichoderma viride and bacillus megatherium according to the weight ratio of (2-3): (2-3): (1-2): (1-2). The earthworm culture is a culture medium obtained by naturally fermenting cow dung and corncobs and air-drying the cow dung and the corncobs, the culture medium is used for breeding earthworms, a conditioner is added in the breeding period, and the earthworms and the earthworm culture are separated after breeding. Effective combination of the earthworm culture, the fine ground phosphate rock and the complex microbial inoculant is realized, so that the prepared composition forms a physical-chemical-biological multiphase synergistic reaction chain in tropical sandy soil, the physical structure, microbial diversity and nutrient immobilization capability of the sandy soil are improved, and the combined effects of fertilizing the soil, and increasing the phosphorus content and the disease resistance of crops can be realized.

Description

technical field [0001] The invention relates to the field of green agriculture, in particular to a method for improving the quality and efficiency of tropical sandy farmland soil. Background technique [0002] Sandy soils are among the most widespread in the world, covering more than 900 million hectares. While sandy soils are predominantly found in sparsely populated arid regions such as deserts and desert fringes, in the sub-humid tropics sandy soils are important food crop producers. For example, the red sandy soil in South and Southeast Asia accounts for 10% of the world's red sandy soil; the highland soil area in northeastern Thailand is 20 million hectares, and the area is dominated by light sandy soil, with clay content in the topsoil <15%, and soil organic matter Low content, weakly acidic. my country's tropical sandy soil is mainly distributed in Hainan Province, with a total area of ​​4.85 million mu, which is an important part of Hainan's agriculture. Hainan...

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Problems solved by technology

However, the above-mentioned technologies focus on the improvement of sandy soil in temperate and cold regions. Under the conditions of high temperature and heavy rainfall in the tropics, the mineralization rate of organic matter is relatively fast, and there is very little organic matter that can exist stably in the soil for a long time. Therefore, organic matter is applied to tropical soil. The improvement effect of materials is usually short-term, which greatly increases the difficulty of improving the quality and efficiency of sandy farmland soil in tropical areas

At the same time, only the improvement of soil physical and chemical properties has a limited effect on the control of disease incidence.

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