Saline land improvement method

Abstract

The invention provides a saline land improvement method and belongs to the technical field of saline land improvement. The saline land improvement method comprises the following steps of locally smashing straws of plants growing in a saline land and then spreading the straws on the saline land, continuing to sequentially spread a composite microbiological material for renovation and urea on the surface of the saline land spread with smashed straws, and plowing and watering the saline land spread with the smashed straws, the composite microbiological material for renovation and the urea on the surface, wherein the composite microbiological material for renovation comprises raw material components: 4-6 parts by weight of organic manure, 2-4 parts by weight of humic acid, 0.7-3 parts by weight of agricultural organic waste, 0.2-0.4 part by weight of marine organic waste, 0.01-0.02 part by weight of liquid fungicide and 0.005-0.01 part by weight of solid fungicide. The saline land improvement method has the advantages of being low in renovation cost, small in working amount, convenient to operate and free of secondary pollution.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land improvement, in particular to a method for improving saline-alkali land. Background technique [0002] Saline-alkali land refers to the land where the salt contained in the soil affects the normal growth of crops. In areas with severe saline-alkali soil, plants can hardly survive. In the process of saline-alkali utilization, it can be divided into mild saline-alkali land, moderate saline-alkali land and severe saline-alkali land. [0003] In mild saline-alkali land, the salt content is below 0.3%, the emergence rate is 70%-80%, and the pH is about 7.1-8.5; in severe saline-alkaline land, the salt content exceeds 0.6%, the emergence rate is less than 50%, and the pH is above 9.5; in moderate saline-alkali land The salt content is 0.3-0.6%, the emergence rate is 50%-70%, and the pH is about 8.5-9.5. [0004] The main reasons for the formation of saline-alkali land are: [0005] Climate...

AI Technical Summary

Problems solved by technology

[0011] 1) Large water washing salt consumes too much water resources, which is not conducive to water saving; the project volume is large, and the investment in drainage projects is high, which is uneconomical; the irrigation water source is saline-alkali water, the greater the degree of saline-alkali irrigation

[0012] 2) In the case of high groundwater level (such as coastal saline-alkali land, the groundwater level is only 0.8 meters in the dry season), shallow group wells should be intensively drained and irrigated (the groundwater level is required to be 2.5 meters to 3 meters), and underground pipe salt drainage (requires groundwater The water level is about 1.5 meters) and other measures are not applicable; at the same time, the engineering, maintenance, and management costs of the underground underground pipe salt drainage system and the shallow group well system are very high; many drainage ditches and a large number of engineering earthworks occupy farmland;

[0013] 3) Soil improvers have strict requirements on salinity types, crop planting structure and irrigation water-saving conditions, etc., and their applicability is narrow; and most of them are made of minerals, biochemical polymer complexes, etc., with limited resources and easy to cause secondary pollution. secondary pollution

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