Calcium-rich saline water and method for irrigating calcium-rich saline water and reducing salt content in soil

Abstract

The invention discloses calcium-rich saline water and a method for irrigating calcium-rich saline water and reducing salt content in soil. The calcium-rich saline water comprises the following components in parts by weight: 2-3 parts of calcium sulfate and / or 2-5 parts of calcium nitrate, 0-5 parts of ammonium sulfate, 0-5 parts of sodium thiosulfate or ammonium thiosulfate and 1000 parts of fresh water of which the salinity is less than 1g / L or brackish water of which the salinity is 2g / L-5g / L or saline water of which the salinity is greater than 5g / L. In the invention, the experiment proves that when the calcium-rich saline water capable of improving Ca<2+> proportion and relatively reducing Na<+> content is used for irrigating saline soil, the salt content in the soil is reduced, and the proportion of Na<+> ions in salt ion composition in the soil is reduced, thereby ameliorating the negative effect on soil structure, permeability and other physical properties caused by high Na<+> content, so that the improved soil is beneficial to growth of certain plants.

Description

technical field [0001] The invention relates to a soil improvement technology, in particular to a calcium-enriched salt water and a method for reducing soil salt by irrigating the calcium-enriched salt water. Background technique [0002] Along my country's more than 18,000-kilometer coastline, the Bohai Sea, the Yellow Sea, and the East Coastal Plains have a large area of ​​coastal saline soil dominated by chlorides and high in salt content. These are difficult-to-use soil resources that are not easy for plants to grow. Among them About 80% have not been utilized, especially in arid and semi-arid areas of my country, nearly 400,000 km 2 The saline-alkaline wasteland and the land formed entirely by blowing the sea have higher soil salinity. [0003] Due to the deterioration of coastal soil physical properties, high degree of soil salinization and lack of fresh water resources caused by salinity, these factors have seriously affected the ecological restoration and greening co...

AI Technical Summary

Problems solved by technology

[0007] If the soil is irrigated with deep groundwater, the salt content of the soil can be greatly reduced, but there is still a problem of high sodium ion ratio

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