Special ecological fertilizer for saline-alkali soil and preparation method thereof

Abstract

The invention belongs to the field of fertilizer for crops and particularly relates to a special ecological fertilizer for saline-alkali soil and a preparation method thereof. The special ecological fertilizer is characterized by being composed of reed, common cordgrass, sweet potato powder residue, citric acid industrial residue, dry chicken manure, ammonium sulfate, monocalcium phosphate, potassium humate, trace elements, guar gum, esterified starch and a soil conditioner. The special ecological fertilizer is mainly composed of organic fertilizer, is rich in organic matters and humic acid and is added with a small amount of acidic inorganic fertilizer in a compounded way; therefore, the special ecological fertilizer is comprehensive in nutrition and is capable of well meeting the nutrition demands for growth of crops; the soil conditioner in the special ecological fertilizer is capable of improving the soil environment, reducing the pH value of alkali soil, lowering the content of soluble salt and increasing the content of N, P and K in soil and thus the utilization rate of the fertilizer can be improved.

Description

technical field [0001] The invention belongs to the field of slow-release fertilizers, in particular to a special ecological fertilizer for saline-alkali soil and a preparation method thereof. Background technique [0002] Saline-alkali soil is a type of soil in which the concentration of soluble salts or exchangeable sodium ions in the soil reaches a certain level, which makes the pH of the soil high and makes it difficult for crops to grow. The problem of soil salinization is widespread in the world. In the arid, semi-arid and coastal areas of northern my country, due to the lack of precipitation and strong evaporation, the salt-rich groundwater rises and accumulates on the surface, causing the accumulation of salt in the soil plow layer. Coupled with the long-term unreasonable application of inorganic fertilizers, the soil pH will eventually increase and the soil will become salinized. Studies have shown that saline-alkali soils have high salinity and high alkalinity, whi...

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Problems solved by technology

[0004] Chinese Patent Publication No. CN1631857A discloses a saline-alkali soil improvement fertilizer and its preparation method, including microbial composite bacteria liquid and dry material. Actinobacillus mobilis, but its source of raw materials is less, the preparation method is complicated, and it is not suitable for large-scale industrial production

[0006] At present, most of the special fertilizers for saline-alkali soil use compound microbial fertilizers, but due to the high salt content in saline-alkali soils, the activity of soil microorganisms is inhibited, and the fertilizer utilization rate of biological fertilizers is low.

There are also soil improvers in the prior art, but they only change the physical and chemical properties of the soil, and the effect of improving soil fertility, soil root system and soil microbial living environment system is not ideal