Composite soil remediation agent suitable for saline-alkali soil

Abstract

The invention discloses a composite soil remediation agent suitable for saline-alkali soil. The composite soil remediation agent comprises the following raw materials in parts by weight: 20-200 parts of a composite microbial agent, 80-300 parts of modified potassium fulvate, 20-50 parts of polyacrylamide, 20-100 parts of chitosan, 50-200 parts of polyaspartic acid and 600-900 parts of other organic matter additional fertilizer, wherein the composite microbial agent is mainly prepared from a fermentation liquid composed of following 11 strains: stenotrophomonas rhizophila X1, bacillus thuringiensis SMs13, bacillus licheniformis SMrs15, bacillus laterosporus LEs15, bacillus amyloliquefaciens LEr08, bacillus megaterium FBs03, bacillus subtilis FBrs14, bacillus sp. Ds18, Pseudomonas mendocina L1, Pseudomonas stutzeri Dst11, and Lactococcuslactissubsp.lactis. The saline-alkali soil is safely, rapidly and efficiently repaired, the repairing cost is reduced, secondary pollution is reduced, the yield of saline-alkali soil is remarkably increased, and the quality of agricultural products is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of agricultural soil restoration, and in particular relates to a composite soil restoration agent suitable for saline-alkali land. Background technique [0002] Soil is an important resource for human survival, but land salinization has caused the destruction of resources, the huge loss of agricultural production and the threat to the biosphere and ecological environment. Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to incomplete statistics from UNESCO and FAO, the area of ​​saline-alkali land in the world is 954 million hectares, of which my country is the largest 99.13 million hectares, the area of ​​saline-alkali soil in my country accounts for about 60% of the country's land area. The salt contained in this type of soil affects the normal growth of crops. It has high pH value, high harmful salt content, poo...

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Problems solved by technology

However, the microbial agent is composed of a variety of different strains, and the strains are bound to produce flora competition and antagonism. The repair effect on saline-alkali soil is caused by the influence of many different strains in different environments and regions. Unstable effect

[0017] Chinese patent document CN107935650A discloses a microbial fertilizer for improvement of saline-alkali soil in alkaline soil. By compounding Escherichia coli, phosphorus and potassium-dissolving bacteria, nitrogen-fixing bacteria and photosynthetic bacteria, the microbial bacterial agent is prepared and mixed with other ingredients to obtain the Microbial fertilizer, but the function of phosphorus- and potassium-dissolving bacteria is to decompose insoluble inorganic minerals in the soil into soluble potassium, phosphorus, magnesium and other elements, which will increase the metal ion content in saline-alkali soil and further aggravate the degree of salinization. Nitrogen-fixing bacteria convert the nitrogen in the atmosphere into nitrate and nitrite components, which also further deteriorates the saline-alkali soil, and the microbial anti-osmotic pressure strength in the microbial agent is low, and the survival rate is low in saline-alkali soil. In addition, Microbial fertilizer can not reduce the alkalinity of saline-alkali land

[0018] Due to the common problem of thin soil and poor structure in saline-alkali land, the soil lacks the nutrients needed for crop growth

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