Method and system for desalting soil of coastal saline and alkaline land

A saline-alkali land and desalination technology, which is applied in the fields of soil preparation methods, botanical equipment and methods, seaweed cultivation, etc., can solve problems that need to be improved

Active Publication Date: 2013-02-27
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current methods of saline-alkali land improvement in coastal areas still need to be improved

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  • Method and system for desalting soil of coastal saline and alkaline land
  • Method and system for desalting soil of coastal saline and alkaline land

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the descrip...

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Abstract

The invention provides a method and a system for desalting soil of coastal saline and alkaline land. The method for desalting the soil of the coastal saline and alkaline land includes the following steps of performing soil excavating and blocking up to the coastal saline and alkaline land to be desalted to form a platform field and bottom land; constructing a microalgae cultivating device in the bottom land and planting salt-tolerant plants on the platform field; subjecting the platform field to salt leaching by using underground salt water or natural rainfall to obtain salt-leached drained water with the salt content of 0.3-10 wt.%; and leading the salt-leached drained water in the microalgae cultivating device for microalgae cultivation. By means of the method and the system, the soil of the coastal saline and alkaline land can be effectively desalted, and simultaneously, the salt-leached drained water can be effectively used for cultivating microalgae.

Description

technical field [0001] The present invention relates to methods and systems for desalination of soil in coastal saline lands. Background technique [0002] my country's coastline is more than 18,000 kilometers long. Coastal saline-alkali areas are mostly lands receding from the sea, and most of the soil is coastal saline-alkali soil, which develops directly on the saline silt of tidal flats. This kind of saline-alkali geological soil is heavy and viscous, not only the surface layer of the soil is heavy in salt, but also the content of salt in the bottom soil is very high, which is similar to the original saline silt. At the same time, due to the shallow depth of groundwater in the coastal area and the shallow groundwater is saline water, groundwater with high salinity accumulates in the upper soil with strong soil surface evaporation, and the salt content of the soil is mostly between 0.4-3%, even up to 3 -4%. Another characteristic of coastal saline-alkali soil is that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01G33/00
CPCY02A40/80
Inventor 陈群刘嘉李彦王淑娟赵博禚玉群陈昌和
Owner TSINGHUA UNIV
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