Partial flow collecting, permeation enhancing and evaporation restraining saline land improvement system and method

Abstract

The invention relates to a partial flow collecting, permeation enhancing and evaporation restraining saline land improvement system and method. The improvement system comprises a millstone type water collecting microtopography area and a plurality of first permeation enhancing pipes embedded below the millstone type water collecting microtopography area, wherein the millstone type water collecting microtopography area comprises a semi-arc-shaped mound arranged in a plant pit and used for plantation of plants, the semi-arc-shaped mound is at least partly exposed out of the ground, and an annular cofferdam is arranged on the periphery of the semi-arc-shaped mound. The upper ends of the first permeation enhancing pipes are communicated with the annular cofferdam, the lower ends of the first permeation enhancing pipes are embedded deep into the area, close to the plant root system, below the millstone type water collecting microtopography area, an isolation layer communicated with the lower ends of the first permeation enhancing pipes is further laid at the bottom of the plant pit, and hidden salt elimination pipes are laid in the isolation layer. According to the method, a good microtopography growth environment is overall provided for plants in a coastal saline-alkali land while water and nutrients required by plant growth are satisfied, and plant growth is promoted.

Description

technical field [0001] The invention relates to a saline-alkali land treatment technology, in particular to a saline-alkali land improvement system and an improvement method for local flow collection to increase seepage and suppress evaporation. Background technique [0002] The characteristics of saline-alkali land in coastal areas can be roughly summarized as: one large, three high, one low and one poor. Specifically: large evaporation, high groundwater salinity and high groundwater table are the root causes of coastal saline-alkali land, which eventually lead to high soil salinity, low nutrient content and poor soil structure. [0003] Therefore, in order to improve the local environment of saline-alkali land, it is necessary to start from the source of coastal saline-alkali land in order to achieve the purpose of improving saline-alkali land. Large evaporation and high salinity of groundwater are natural factors that cannot be fundamentally changed by humans. However, h...

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Problems solved by technology

[0004] At present, the method of controlling saline-alkali land is relatively simple, such as only using chemical methods to improve the soil, which is only considered from the perspective of the result of forming saline-alkali land, and often treats the symptoms but not the root cause; and only interrupts the upward flow of capillary water in the soil by laying salt barriers Moving or only laying underground pipes to reduce the groundwater level, although from the perspective of the root cause of the formation of saline-alkali land, its structure is too simple and the results of the formation of saline-alkali land are ignored, that is, there is no soil improvement.

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