The invention relates to the technical field of
soil treatment, and particularly relates to a high-efficiency
saline-alkaline soil improvement method. The method comprises the following steps that desulfurized
gypsum,
zeolite and vinegar residues are mixed; then
gluconic acid, expired yogurt and grape
skin are added; the
gluconic acid, the expired yogurt and the grape
skin are degraded under the action of
nitrogen-fixing
alcaligenes faecalis for generating a large amount of free hydrophilic carboxyl groups; the carboxyl groups are introduced into the surfaces of the desulfurized
gypsum, the
zeolite and the vinegar residues under the action of the microorganisms for improving the hydrophilicity; the carboxyl groups have a
metal complexing property, and finally a
fermentation product which has good hydrophilicity and can adsorb
metal salts by complexing is obtained; the
fermentation product is put into porous moso bamboos; the porous moso bamboos are buried in planting pits; and then
saline-alkaline tolerant plants are planted in the planting pits, so that improvement on
saline-alkaline soil is completed. Water in surrounding soil can be gathered and absorbed, so that an effect of
water retention and
moisture preservation is achieved. With the increase of the concentration of the water in the soil, the concentration of salt in the soil can be reduced, the alkalization degree is reduced, the pH value of the soil is buffered, and the purpose of improving the saline-alkaline property is achieved.