Method for ecologically improving saline-alkali land of Yellow River irrigated areas by earthworm

Abstract

The invention discloses a method for ecologically improving saline-alkali land of Yellow River irrigated areas by earthworm. The method comprises the following steps of S1, selection of earthworm variety: because the earthworm varieties are more, and the bearing capabilities of different earthworm varieties on pollution degree are different, selecting the proper earthworm variety according to soil conditions; S2, artificial culture of earthworm: artificially culturing the earthworm because of lower propagation speed due to the limitations of temperature, soil humidity and environment on wild earthworm; S4, adding an earthworm culture feed by using 10 days as one cycle, and stirring soil by using one month as one cycle; adjusting the culture density of earthworm by using three months as one cycle. The method has the advantages that the soil is loosened according to the soil eating characteristics of earthworm, and the air ventilating property and water drainage function of soil are improved; the earthworm drags organic matters into a dug cavity to accelerate the decomposing of soil, and the amount of nutrients required by plant growth is increased; the cost is low, the soil improving effect is good, the huge profit is realized by the additional harvesting of earthworm, and the ecological circulating effect is obvious.

Description

technical field [0001] The invention relates to a method for ecologically improving saline-alkali land in the Yellow River irrigation area by using earthworms. Background technique [0002] The geological structure of the Yellow River Irrigation District is a subsidence faulted basin, mainly lacustrine deposits, and the sedimentary layers are rich in salt. The Yellow River flows through the irrigation area and supplies a large amount of groundwater. Except for the small amount of groundwater and poor water quality in the southwest of Tumochuan, the groundwater in most areas is of good quality and can be used for irrigation. The soil-forming parent material of the soil in the irrigation area is the alluvial sediment of the Yellow River, and the surface layer in most areas is dominated by light sandy loam. The clayey soil is distributed in the west of the irrigation area and the lower reaches of Hasuhai in the east, and is mostly distributed with light sandy loam. The climate...

AI Technical Summary

Problems solved by technology

In addition, if the soil is too alkaline, it will affect the availability of nutrients such as phosphorus, iron, manganese, boron, and zinc in the soil, and will easily cause a large amount of nitrogen, phosphorus, and potassium major elements, as well as trace elements such as iron, calcium, and boron.