Method for improving sandy soil

Abstract

The invention discloses a method for improving sandy soil. A straw modified material is added into soil and is fully mixed with surfaced soil; when a ratio of sand with granularity of more than 0.02mm in the soil is over 85 percent, the adding amount of the straw modified material is 1,400 to 1,750kg/mu; when a ratio of sand with granularity of more than 0.02mm in the soil is between 55 and 85 percent, the adding amount of the straw modified material is 750 to 1,000kg/mu; when a ratio of sand with granularity of more than 0.02mm in the soil is below 55 percent, the adding amount of the straw modified material is 300 to 500kg/mu; and the straw modified material is prepared by uniformly mixing rotted and decomposed crop straw, calcium bentonite and anion polyacrylamide. The method has the advantages of no secondary pollution, low cost and no soil hardening; the straw modified material has the characteristics of a soil modifier and an organic fertilizer; and sand soil or tilled land is not needed to be reconstructed, and final-period management is avoided.

Description

technical field [0001] The invention relates to sandy soil improvement technology, specifically a method for improving sandy or desertified farmland and grassland, and belongs to the technical field of sandy soil improvement and soil desertification prevention and control. Background technique [0002] my country is one of the countries most seriously harmed by desertification in the world. The large area and wide distribution of desertification have threatened human survival and development space, leading to a serious decline in land productivity, exacerbating the deterioration of the ecological environment, causing serious economic losses, and affecting food security. pose a threat. Therefore, it is of great practical significance to explore practical techniques and methods for improving sandy soil. [0003] In recent years, various desertification soil improvers have come out one after another, and achieved certain results. However, most of the soil improvers are chemi...

AI Technical Summary

Problems solved by technology

However, most of the soil improvers are chemical products, the cost is high, and it is easy to produce chemical secondary pollution

my country is rich in straw resources, and straw contains a lot of organic matter, nitrogen, phosphorus, potassium and trace elements. It is one of the important organic fertilizer sources in agricultural production and can be used to improve soil physical and chemical properties, thereby promoting agricultural production and increasing income; while bentonite, polypropylene Amide (PAM) is also a good soil improver, which has a good improvement effect on improving soil structure, increasing soil moisture, water conservation, fertilizer conservation and moisture conservation, etc., but these amendments are only used alone at present, and if used for a long time, it will lead to adverse consequences such as soil compaction