Ecological restoration system for saline-alkali soil

Abstract

The invention discloses ecological restoration system for saline-alkali soil. The system comprises a salt isolation soil base and a plurality of pieces of modular turf, the salt isolation soil base comprises a rubble layer, a geotextile layer, a gravel layer, a polyethylene plastic film layer and a straw layer which are sequentially laid from bottom to top, and the salt isolation soil base is laid on original saline-alkali soil; and each piece of modular turf comprises a 4-6 stone layer, a medium stone layer and a fine stone sand layer which are sequentially filled from bottom to top, wherein the fine stone sand layer is covered with glass fiber cloth, the upper portion of the glass fiber cloth is filled with a soil dressing layer, halophilic-basophilic microbial fertilizer is mixed in the soil dressing layer, and saline-alkaline tolerance grass is pre-planted on the soil dressing layer. According to the method, salt migration and salt return can be greatly reduced, the salt elimination effect is improved, meanwhile, rapid planting can be achieved through the modular turf, the problem that plants directly sown in the saline-alkali soil are difficult to survive is solved, and invalid soil is gradually changed into mature soil where the plants can grow through the halophilic-basophilic microbial fertilizer mixed in alien soil.

Description

technical field [0001] The invention specifically relates to an ecological restoration system for saline-alkali land. Background technique [0002] my country has a vast territory, but because mountains, hills and plateaus account for 69% of the country's area, there is not much land suitable for cultivation. Moreover, the percentage of saline-alkali land in the national land area also ranks in the forefront in the world. The aggravation of soil salinization has led to the inability of many plants to survive, which has seriously affected my country's agricultural development and ecological civilization construction. [0003] In the process of ecological restoration of saline-alkali land, salt invasion is a serious problem, and the salt in the surrounding and bottom saline-alkali soil easily invades into the planting soil. At present, the method of laying gravel is generally used to set up an isolation layer, and then plant saline-alkali-tolerant plants on the isolation lay...

AI Technical Summary

Problems solved by technology

At present, the method of laying crushed stones is generally used to set up the isolation layer, and then plant saline-alkali-tolerant plants on the isolation layer, which has the problems of poor isolation effect, flood irrigation salt is easily transferred to the planting soil in heavy rain, and the germination of saline-alkali-tolerant plant seeds The problem of low rate and difficult survival of seedlings

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