Method for improving saline soil in excavated grooves of border trees in coastal region

Abstract

The invention relates to a method for improving saline soil in excavated groves of border trees in a coastal region. The method comprises the following steps: 1, draining salt underground; 2, excavating the original soil in excavated groves of the border trees, airing the excavated soil aside, watering the excavated soil thoroughly, making a soil body in a freeze thawing state, repeatedly naturally freezing and thawing the soil body in winter, thawing the soil body in spring, mixing industrial wastes in the soil body, blending uniformly, and directly backfilling the blended soil serving as backfill into ditches excavated for the border trees; 3, starting border irrigation with a great amount of water, soaking the soil body, draining saline water through a concealed pipe salt drainage system, and stop salt-leaching when soil salinity in 1-meter soil body is detected to be below 0.5 averagely; 4, mixing organic wastes in surface soil in the depth of 30cm, and performing rotary tillage to mix uniformly; and 5, selecting saline-alkali tolerant plants, namely trees and shrubs and leguminous plants for improving soil, arranging three-dimensionally, and finishing according to a garden plantation standard. By various means such as engineering and physical improvement and biological treatment, the comprehensive effectiveness is obvious.

Description

technical field [0001] The invention relates to a soil improvement technology, in particular to a method for improving street tree digging saline soil in coastal areas. Background technique [0002] With the continuous deepening of economic development, ecological problems have become increasingly prominent, especially the problem of land salinization, and the problem of soil salinization in coastal areas has become more prominent. Coastal saline-alkali soil has the disadvantages of high salinity, low nutrient, large specific gravity and bulk density, low porosity and permeability coefficient, etc., which greatly restricts the ecological construction and agricultural production in coastal areas. Exploring how to quickly use the deposited coastal primary saline soil (including heavy saline soil from salt pans or dredging filling) to improve it into green planting soil is an urgent research topic. [0003] At present, the soil improvement technology of coastal saline soil mai...

AI Technical Summary

Problems solved by technology

[0003] At present, the soil improvement technology of coastal saline soil mainly adopts relatively mature technology, which is easy to implement and popularize, such as underground pipe salt drainage and foreign soil planting technology. The foreign soil planting technology is very destructive to the farmland in the soil borrowing area, and even destroys the local ecological environment. , and the long-term, large-scale planting soil transportation process increases the traffic flow on the road, easily causing road congestion, heavy vehicles seriously affect the service life of the road, and the exhaust gas pollutes the environment. Great waste, but also seriously affect the quality of the environment