Sponge soil structure with high water retaining and water storage properties

Abstract

The invention discloses a sponge soil structure with high water retaining and water storage properties. The structure is composed at least of a buffer layer, a water storage layer and a water retaining layer; the buffer layer is located at the bottom of the structure, the buffer layer is filled with a first filler, the first filler is formed by rubble and coal gangue, and the interior of the buffer layer is provided with a water discharging pipe; the water storage layer is located on the buffer layer, the water storage layer is filled with a second filler, the second filler is stirred matter of an agricultural waste compost substrate and soil, and the agricultural waste compost substrate comprises corn and straw stalks, and sludge in urban sewage plants; and the water retaining layer is located on the water storage layer, the water retaining layer is filled with a third filler, and the third filler is soil to which a water-retaining agent is added. The structure can repair and improve degraded and polluted soil, especially soil in arid areas, air permeability and water holding capacity of improved soil are greatly improved, soil irrigation in a later period can be effectively reduced, and water resource high-efficiency utilization is realized. The structure and materials are easy to obtain, and the structure has extremely high application value in improvement aspects of the degraded and polluted soil.

Description

Technical field [0001] The invention belongs to the technical field of soil improvement and restoration, and relates to the improvement technology of contaminated soil and degraded soil, in particular to a sponge soil structure with strong water retention and water storage performance, which is suitable for reconstruction of degraded or contaminated soil. Background technique [0002] As a medium for plant growth, soil is inseparable from plant growth. Soil fertility is the core of soil, and soil quality determines plant growth. Due to the strong influence of human activities, the physical and chemical properties of the soil have changed, such as high pH, ​​low organic matter content, lack of effective nutrients, and soil compaction. Among them, soil pollution and degradation of its physical properties are the most common and severely affect the normal growth of plants. The natural development level of the soil disappears, the soil is barren, the soil structure is poor, and its ...

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Problems solved by technology

[0004] At present, the improvement methods of polluted soil or degraded soil include: adding organic matter, adding improver and guest soil method, etc., but none of them take into account the reconstruction of the soil profile structure to improve the soil with different functions at different levels of the soil, not only lack of Targeted and largely ineffective in addressing soil pollution and degradation

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