Fertilizer for saline-alkali soil

Abstract

The invention relates to the technical field of saline-alkali soil improvement, and particularly discloses a fertilizer for saline-alkali soil. The fertilizer is prepared from, by weight, 33-40 partsof decayed chicken manure, 30-38 parts of bentonite, 30-35 parts of straw, 20-32 parts of urea, 16-28 parts of calcium superphosphate, 6-14 parts of potassium sulphate, 6-13 parts of sulphur, 5-12 parts of urea resin and 1-3 parts of starch xanthate, wherein the urea resin is of a hollow microsphere structure and high in cohesiveness, when the urea resin is used in the soil, dispersed bentonite particles can form a granular structure, the stability of original granules in the soil is improved, and the air permeability, the water permeability, the water-retaining property and the fertilizer-maintenance capacity of the soil are improved. The starch xanthate is high in complexation performance, the self cleaning capacity of the saline-alkali soil is poor, heavy metal ions are easy to deposit,so that the soil and the surrounding water sources and air of the soil are polluted, complexes can be formed by the starch xanthate and the heavy metal ions, such as chromium and nickel, and the harmcaused by deposition of the heavy metal ions in the soil is reduced.

Description

technical field [0001] The invention relates to the technical field of saline-alkali soil improvement, and specifically relates to a saline-alkali soil fertilizer. Background technique [0002] Saline-alkali land means that the land is affected by natural or human factors, causing salt substances to gradually penetrate into the soil, so that the soil contains more salt and alkali, and makes this type of land unusable. The saline-alkali land in China is roughly distributed The area is in the northwest, northeast, north China and coastal areas. The main reason for the formation of saline-alkali land is that the land in relatively arid areas evaporates into water vapor and is discharged into the air, but the salt in the water cannot be eliminated and remains in the air. In the soil, after a long period of accumulation, the salt in the soil gradually increases, thus forming a saline-alkali land. Because the saline-alkali soil itself contains too much salt, according to the princ...

AI Technical Summary

Problems solved by technology

[0002] Saline-alkali land means that the land is affected by natural or human factors, causing salt substances to gradually penetrate into the soil, so that the soil contains more salt and alkali, and makes this type of land unusable. The saline-alkali land in China is roughly distributed The area is in the northwest, northeast, north China and coastal areas. The main reason for the formation of saline-alkali land is that the land in relatively arid areas evaporates into water vapor and is discharged into the air, but the salt in the water cannot be eliminated and remains in the air. In the soil, after a long period of accumulation, the salt in the soil gradually increases, thus forming a saline-alkali land. Because the saline-alkali soil itself contains too much salt, according to the principle of plant cell osmosis, it is difficult for plant cells to absorb inorganic nutrients and water. Cause plants to die due to the lack of inorganic nutrients and water, thus causing a vicious cycle of saline-alkali soil ecology; existing saline-alkali soil fertilizers have a single fertilizer effect, or focus solely on reducing salt and alkali, or solely focus on improving soil fertility, lacking a comprehensive Fertilizer for saline-alkali land treatment, reducing salinity and increasing fertility while improving soil physical and chemical properties, strengthening soil self-healing ability, thus forming a virtuous circle to achieve twice the result with half the effort