A viscous soda-type saline-alkali soil improver and its technology for saline-alkali soil improvement

Abstract

The invention discloses a viscous soda type saline-alkali soil modifier and a process for applying the modifier to modification of saline-alkali soil. The modifier is prepared from the following materials in parts by weight: coarse sand, rifamycin fermented filter residue obtained after innocent treatment, superphosphate, ferrous sulfate, aluminum sulfate and glucosamine hydrochloride. The viscoussoda type saline-alkali soil modifier is suitable for viscous soda type saline-alkali soil, can effectively reduce the pH value and degree of alkalization of soil and improve the character of the viscous soil, and is rich in material source; crops after modification of 2-3 years can reach the level of middle-output fields; especially by using rifamycin fermented filter residue, waste is changed into wealth, so that the increasingly severe environment problem can be solved. The viscous soda type saline-alkali soil modifier fundamentally improves the character of the viscous soil by adopting the coarse sand, and can improve the porosity and permeability and increase water penetration.

Description

technical field [0001] The invention relates to the technical field of saline-alkali soil improvement, in particular to a viscous soda-type saline-alkali soil modifier and a process for improving saline-alkali soil. Background technique [0002] Due to the poor physical and chemical properties of the soil and the high content of water-soluble anions and cations, the saline-alkali land is difficult to be used beyond the tolerance limit of crops, especially the clayey soda-type saline-alkali land is the most difficult to improve. Soda-type saline-alkali soil has fine particles, lacks large pores between soil particles, and has poor ventilation and water permeability; if it is cohesive soil, the soil texture is heavy and poor in structure, it is difficult to reduce alkali and wash salt, resulting in the improvement of clay soda-type saline-alkali land. It is very difficult. Therefore, the improvement of such saline-alkali land should comprehensively consider specific improveme...

AI Technical Summary

Problems solved by technology

For example, desulfurization gypsum improves saline-alkali land, which can reduce soil pH and alkalinity, but desulfurization gypsum itself has low solubility and requires a large amount of water as a medium, which may further increase soil salinization in areas with high groundwater levels; Saline-alkali technology has little effect on alkaline soil, especially saline-alkali soil with heavy texture and basic water permeability, which cannot improve soil structure, reduce soil alkalinity and salinity; The salinity within the threshold is effective, and many other factors must be considered

At present, the improvement of clay soda-type saline-alkali land mainly adopts the method of applying desulfurization gypsum or various organic and inorganic acids, but the effect is not good. The reaction is difficult to carry out; and the texture is sticky and heavy, which is easy to form a water-proof layer and cannot elute various water-soluble salts

In particular, the solubility of desulfurized gypsum in water is low, its effect is slow, and it is easy to be lost with drainage. The improvement process is difficult and difficult to operate, resulting in little effect on improving the properties of soil particles.

[0004] Chinese patent application 201610099493.8 discloses a soda-type saline-alkali soil conditioner and its preparation method, which mainly uses a certain amount of desulfurized gypsum, aluminum sulfate, citric acid, and humic acid to improve soda-type saline-alkali soil. The workload of component sieving is already very large; in addition, desulfurization gypsum is used as the main modifier, because of its low solubility, the improvement period is long, especially for clay saline-alkali land, the improvement period is longer and the applicability is poor

[0005] Chinese patent application 201610450531.X discloses a saline-alkaline soil improver, which can reduce soil alkalinity to a certain extent, but the preparation process is cumbersome, and medicinal materials such as chrysanthemum, saponins, mulberry leaves and isatidis need to be added Plants, the cost is high, only limited to soil salinization soil improvement in Northeast China, and the applicability is poor

[0006] Chinese patent application 201310069798.0 discloses a saline-alkali land improvement method, which can improve soil properties to a certain extent, but is poor in reducing soil pH, reducing carbonate and bicarbonate ions, and may increase soil salinity