Natural soil improvement method for saline and alkaline land

Abstract

The invention relates to a natural soil improvement method for saline and alkaline land. The improvement method includes the steps of natural soil investigation, wherein the physical and chemical properties of natural soil in a planting area are detected; natural soil treatment, wherein the treatment includes a natural soil digging process and a natural soil stirring process; natural soil backfilling, wherein a salt isolating layer is arranged before backfilling, and then backfilling is conducted with the treated natural soil obtained after stirring. The improvement method has the advantages that the salinity and alkalinity of the planting area can be effectively improved, and the pH value and salt content of the natural soil can be mitigated; besides, through the spreading process in natural soil digging, salt and alkali can be diluted, water evaporation of the natural soil can be relieved, and salt accumulation on the surface of the natural soil can be effectively inhibited; in the stirring process, the acidity of the natural soil can be increased, the cation content can be increased, the buffer capability of the natural soil can be improved, and thus the survival rate of transplanted seedlings can be increased.

Description

technical field [0001] The invention belongs to the field of soil improvement, in particular to a method for improving original soil in saline-alkali land. 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. The area of ​​saline-alkali land in the world is 954.38 million hectares, of which 99.13 million hectares is in my country. 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. All kinds of saline-alkali soils are formed under certain natural conditions. The essence of their formation is mainly the redistribution of various soluble salts in the horizontal and vertical directions on the ground, so that the salt gradually accumulates on the soil surface in the salt-gathering ...

AI Technical Summary

Problems solved by technology

[0003] The main factors that restrict landscaping in salinized land are "one deficiency, three highs and one low", that is, water shortage, high salinity in the original soil, high groundwater level, high groundwater salinity, low altitude, and the soil is tight and breathable Poor resistance, soil secondary salinization is serious, which seriously affects the survival rate of transplanted trees