Coastal saline-alkali soil greening system based on landscaping waste utilization

Abstract

The invention discloses a coastal saline-alkali soil greening system and method based on landscaping waste utilization. The coastal saline-alkali soil greening system comprises a covering layer, a to-be-improved soil layer, a permeable film layer, a spraying isolation layer, a concealed pipe salt drainage ditch, a salt drainage well, vent holes, a waterproof layer and a saline-alkali soil layer which are sequentially arranged from top to bottom; the covering layer is arranged on the earth surface near the roots of soil body plants; the to-be-improved soil layer is a mixture of undisturbed saline soil, decomposed landscaping branch and leaf crushed materials and other organic and inorganic fertilizers; the spraying isolation layer is made of garden branch, trunk or tree root waste crushed materials; and the concealed pipe salt discharging ditch is positioned below the spraying isolation layer. According to the system and the method, organic matter resources such as regional landscaping waste can be fully utilized, the salt leaching and discharging efficiency is enhanced, the underground water level is effectively reduced, salt return is prevented, surface evaporation is reduced, the soil fertility is increased, and the purpose of improving salinized soil is achieved. The damage to cultivated land resources can be reduced, the use of building material resources such as stone chips is saved, and the resource utilization of landscaping wastes is realized.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land greening, and in particular relates to a coastal saline-alkali land greening system based on utilization of landscaping waste. Background technique [0002] my country's coastal saline-alkali soil is widely distributed, with a total area of ​​500×10 4 hm 2 . Coastal saline soil has problems such as high groundwater level, poor soil permeability, and difficulty in leaching. Due to the large amount of evaporation, salt accumulates on the surface, causing the salt content of the soil to exceed the limit of plants, forming salt damage, and making it difficult for plants to survive. Over the years, with the development of economy and industry, saline-alkali areas have become a new frontier for economic development. In order to meet the needs of construction and development, various methods of controlling saline-alkali land have been widely used. Among them, the method of "planting with fo...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a coastal saline-alkali land greening system based on landscaping waste utilization; aiming at problems such as high groundwater level in coastal saline soil areas, poor soil permeability, large evaporation, and difficulty in plant survival, as well as foreign soil Lack of resources, high cost of gravel, etc., and at the same time face the practical difficulties of difficult disposal and utilization of landscaping waste

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