Saline-alkali soil improvement biological method

Abstract

The invention discloses a saline-alkali soil improvement biological method. The method comprises the steps of (1) fertilizing and flattening saline-alkali soil in that year, and making high and low ridges at intervals, wherein the high and low ridges are 1.5-2 m in width and the high ridge is higher than the low ridge by about 20-40 cm; (2) after irrigation in April to May of that year, planting alfalfa in the high ridge, and planting suaeda glauca in the low ridge; (3) by the end of October in that year, harvesting the alfalfa for 2-3 crops, and leaving stem bottoms and roots, and in the endof October in that year, harvesting the suaeda glauca; (4) performing mixed seeding of astragalus smicus and rattail fescue in the low ridge of the harvested suaeda glauca; (5) performing soil turningand flattening in April of next year, turning aboveground vegetations to be underground, applying white rot fungi, humic acid fertilizer and calcium superphosphate before soil turning and flattening,performing shallow irrigation on the surface layer after soil turning and flattening, and performing ridging and ridge filming; and (6) planting cotton on the ridges in May of next year. The overwintering green manure crop such as the alfalfa is used for soil moisture conservation of the saline-alkali soil in winter while the green manure crop is turned to be underground for use as organic fertilizer in spring.

Description

technical field [0001] The invention relates to the field of improvement methods for saline-alkaline land, in particular to a biological method for improving saline-alkali land. Background technique [0002] The improvement methods of saline-alkali land include water conservancy improvement, agricultural technology improvement, biological improvement, chemical improvement and so on. Water conservancy improvement methods include establishing a complete irrigation and drainage system, separating irrigation and drainage, strengthening water management, strictly controlling groundwater levels, and continuously rinsing and removing the salt in the soil through irrigation, flood diversion, and silt discharge. Biological improvement methods include returning straw to the field, applying bacterial fertilizers, planting salt-tolerant plants, and afforestation, etc., to improve soil fertility, improve soil structure, improve farmland microclimate, reduce surface water evaporation, and...

AI Technical Summary

Problems solved by technology

However, several types of methods or classified measures in methods generally work alone, and there are few measures that work together. Compared with a large amount of investment, the significance of the effect is not strong

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