Method for ecologically restoring abandoned sandpit

Abstract

The invention discloses a method for ecologically restoring an abandoned sandpit. The method for ecologically restoring the abandoned sandpit comprises the following steps: a, smoothing the land; b, preparing seedlings; c, digging holes and preparing soil; d, planting vetiveria zizanioides; e, managing the vetiveria zizanioides; and f, postprocessing. In the same year, the abandoned sandpit can be enabled to increase the organic matter of the shallow soil layer by 35%, the soil stickiness by 44% (represented by the number of soil particles), the microbial community by 20% and the soil water fixing capability by 10%, and decrease the water and soil loss by 30% and the sand dust by 30%; in such a way, the abandoned sandpit can basically reach the arable degree within 3-5 years; the technique for ecologically restoring the abandoned sandpit provided by the invention mainly adopts biological measures and certain auxiliary engineering measures; therefore, not only are the soil nutrient components improved, but also a good water and soil conservation effect is realized; moreover, the manufacturing cost is lower; and in addition, a good ecological environment improvement effect and a good visual effect are realized as well.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration methods, in particular to an ecological restoration method for abandoned sand pits. technical background [0002] Abandoned sand mining area is an extremely degraded ecosystem formed under the serious interference of human factors. Its original vegetation has been reduced, degraded or even disappeared due to drastic changes in the environment, which seriously affects the sustainable development of society and economy. Therefore, abandoned sand mining area Ecological governance has become a hot spot in ecological restoration research. The main characteristics of abandoned sand mining sites are: 1) There is a lot of sand and little soil, the soil nutrient content is low, and the soil microbiota is small, so it is not suitable for farming; 2) Vegetation is destroyed, water and soil erosion are serious, and sand loss is serious. The key to the treatment of abandoned sand pits is to inc...

AI Technical Summary

Problems solved by technology

Due to the low soil content in the sand mining field, most trees are difficult to survive, and the cost is high; the grass species planted are mainly local weeds, which lack aesthetics; and these methods have poor soil and water conservation effects, and it is difficult to improve the ecological environment and regional landscape.

In addition, because most of the sand mining sites are built on the river beach, once there is a rainy year, the abandoned sand mining sites will be the channel of the flood. The trees planted in the abandoned sand mining sites will gather the floating objects in the river to form a large barrier to prevent flooding. Floods pass through, causing flooding

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