Sandy soil improving method

Abstract

The invention relates to a sandy soil improving method. The adopted technical scheme is as follows: (1) adding a certain amount of grass carbon and straws into fresh sludge until C (Carbon) / N (Nitrogen) ratio is (25-35):1 and water ratio is 45-55%, adopting a natural ventilation mode, turning for one time every 10 days, turning for more than five times, and maintaining the temperature of sludge pile at 55 DEG C for more than 10 days so as to obtain rotten sludge; and (2) before spring ploughing, applying the rotten sludge with the applying ratio of 2-15kg / ha-1 into sand, mixing the rotten sludge and the sand being about 20cm in depth uniformly, compacting, smoothening soil surface, watering the soil surface completely, and standing for about a half moth to obtain the improved sand soil. According to the sand soil improved by the method, the mechanical composition is improved, the sand clay content is increased, the content of organic matter is increased obviously, the nutrient contents of N, P, K and the like are improved obviously, the soil bulk density is reduced, the porosity is improved, and the water storage amount in the soil is increased.

Description

technical field [0001] The invention relates to a method for improving sandy soil, in particular to a method for improving sandy soil by utilizing sludge. Background technique [0002] Sandy soil is a kind of soil that does not retain water, does not retain fertilizer and has very low fertility. The mechanical composition is relatively coarse, mostly fine sand and medium sand, and the clay content only accounts for 2-10%. The texture is uniform and the physical clay (< 0.01mm) accounted for only 0.1-6.0%, sandy soil is mostly distributed in arid and semi-arid areas with less rainfall. The content of soil humus is low, the nutrients such as N and P are poor, and the saturated water holding capacity and field water holding capacity are low. Therefore, improving and controlling sandy soil, and finding an economical and effective sandy soil improvement method is very important for increasing the area of ​​cultivated land, maintaining the ecological environment and strengtheni...

AI Technical Summary

Problems solved by technology

Moreover, my country's sludge production has increased sharply. If it is not handled properly, it will easily pollute the environment and endanger human health.