Method for quickly modifying severe soda alkali-saline soil

Abstract

The invention relates to a method for quickly modifying severe soda alkali-saline soil. The invention provides the method for quickly modifying the severe soda alkali-saline soil in order to solve the problem that the modifying effect is lowered as soil clay particles are scattered when the soil clay particles encounter water, soil water cannot permeate below the tillage layer and be separated from the tillage layer due to the blockage of soil pores, and soil modification is limited. The method for quickly improving the severe soda alkali-saline soil comprises the following steps of: 1, deeply loosening severe soda alkali-saline land in a grid way so as to form deeply loosened soil conditions which are favorable to the downward infiltration of soil water and salt; 2, determining the use quantity of a gypsum modifier according to the pH value of the soil in the tillage layer of the severe soda alkali-saline land, and then uniformly scattering the gypsum modifier on the surface of the deeply loosened severe soda alkali-saline soil; and 3, mixing the gypsum modifier within the 20 cm soil layer of the severe soda alkali-saline land by mechanical rotary tillage. The method belongs to the technical field of severe soil modification.

Description

technical field

[0001] The invention relates to a rapid improvement method for severe soda saline-alkali soil, and belongs to the technical field of poor-quality soil improvement. Background technique

[0002] Soda saline-alkali soil is a typical agricultural barrier soil, the soil salinity is mainly sodium carbonate and sodium bicarbonate, the soil alkalization degree is greater than 15%, and the alkalization degree is more than 30% is defined as severe soda saline-alkali soil. Due to the excessive sodium ions, the physical and chemical properties of the soil deteriorate, affect water infiltration, and affect the growth and development of crops through ion toxicity, osmotic stress, and limited nutrient availability. The emergence of crops in severe soda saline-alkali soil is difficult, the growth is inhibited, and it is difficult to obtain normal yield without improvement. Therefore, how to improve soda saline-alkali soil is the first problem to be solved in agricultural p...