Greenhouse soil salinization improving method

Abstract

The invention discloses a greenhouse soil salinization improving method, comprising: (1) making a greenhouse stuffy at high temperature, to be specific, making the greenhouse stuffy at high temperature for 8-10 days in July to August, and making the greenhouse stuffy at high temperature for 2-5 days before field planting; (2) performing salt leaching by flooding, to be specific, performing salt leaching once by flooding after making the greenhouse stuffy at high temperature for the first time; (3) subjecting vegetables and crops to rotation, and covering the crops in soil to improve the soil; (4) digging rough-drain underground pipe ditches; (5) laying underground pipes, to be specific, laying plastic woven cloth at the bottom of each ditch, spreading sand gravel, laying covered underground pipes, spreading sand gravel around and above the underground pipes, and laying plastic woven cloth; (6) covering with fertilizer, to be specific, covering the sand gravel layer with a layer of organic fertilizer; (7) grading the soil, to be specific, raking apart surface soil, and covering the layer of organic fertilizer with the raked surface soil; (8) performing alkali leaching, to be specific, impregnating surface soil with water or a water solution to wash out excessive saline and alkaline matters in the soil. The method of the invention has significant and lasting improving effect.

Description

technical field [0001] The invention relates to a method for improving greenhouse soil salinization and belongs to the technical field of soil improvement. Background technique [0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country is the largest 99.13 million hectares. The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive. [0003] Drainage is an important measure for the improvement and utilization of saline-alkali soil. Only by adopting reasonable irrigation and drainage methods and steadily controlling the decline of groundwater level can the improve...

AI Technical Summary

Problems solved by technology

Due to the high salt content and poor structure of the soil, the stability of the canal system is very poor. The drainage of the open channel is very easy to collapse and silt up or cause serious soil erosion. The open channel will often collapse and silt half within a year, and its drainage effect cannot be guaranteed, seriously affecting Improvement and utilization of salinized farmland