Saline-alkali soil improving agent, and preparation method thereof

Abstract

The invention discloses a saline-alkali soil improving agent, and a preparation method thereof. The preparation method comprises following steps: fermented plant fiber and fermented animal excreta are uniformly mixed and grinded so as to obtain a mixture of 80 to 100 meshes; wood vinegar and water are added, uniform mixing is carried out, and an obtained mixed material is subjected to pelletizing and drying until water content ranges from 3 to 8%, wherein the adding amount of water accounts for 5 to 30% of the total weight amount of the mixture; an obtained product is sieved so as to obtain a granular mixture with a particle size ranging from 3 to 5mm; the granular mixture is subjected to drying and cooling, and a microorganism agent is sprayed onto the surface of the granular mixture; and an obtained semifinished product is uniformly mixed with a mixture A and a mixture B so as to obtain a finished product, wherein the mixture A is obtained via uniform mixing and grinding of ground phosphate rock, vermiculite, medical stone, sodium alginate, and polyacrylamide to 120 to 200 meshes, and the mixture B is obtained via uniform mixing and grinding of humic acid and furfural residue to 80 to 100 meshes. The saline-alkali soil improving agent is capable of reducing soil alkalinity, activating soil, reducing salinity and alkalinity effectively, improving saline-alkali soil structure, improving soil fertilizer conservation and water-holding capacity, improving saline-alkali soil physical and chemical properties, and realizing positive cycling of saline-alkali soil.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land improvement, and in particular relates to a saline-alkali land improvement agent and a preparation method thereof. Background technique [0002] The main feature of saline-alkali land is that it contains more water-soluble salt or alkaline substances. Due to the high salinity and high alkalinity, the soil humus is leached and the soil structure is damaged. It is sticky when wet and hard when dry. There are often white salt deposits on the soil surface, poor ventilation and water permeability, and serious plant wilting. , poisoning and root rot death. Therefore, soil improvement must be carried out on saline-alkali land. [0003] Among the many improvement methods of saline-alkali land, the saline-alkali land improvement agent has been favored by people for its simple operation, quick effect, and low cost. At present, there have been a large number of research results and products in ...

AI Technical Summary

Problems solved by technology

At present, there have been a large number of research results and products in the research and production of soil improvers at home and abroad, but the products currently used are relatively single. For example, replacing sodium in the soil with calcium sulfate needs to be washed out of the plow layer. Increased soil salinity also requires leaching, so this amendment needs to be used with irrigation

However, simple chemical improvement of alkaline soil can not improve compaction, but more irrigation and drainage will easily cause soil nutrient loss and soil bulk density to increase rapidly with the increase of irrigation times, resulting in more serious soil compaction

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