Method for cultivating plants on mining wasteland

Abstract

The invention provides a method for cultivating plants on mining wasteland. The method comprises the following steps that gravel and garbage on the surface of the mining wasteland are cleaned away, the mining wasteland is leveled, water and fertilizer are sprayed for maintenance, a multifunctional adsorption membrane is laid, water-absorbing particles are scattered into prefabricated tailing nutrient soil and stirred until the water-absorbing particles are uniformly distributed, then the tailing nutrient soil is integrally laid, the plants suitable for growth in a mine are planted, and a coversheet is laid on the surface of soil after planting. According to the method, the self-made multifunctional adsorption membrane is adopted, the design of a high-water-absorption cation exchange resinand a selective water-permeable membrane is also used, the membranes and the resin are applied to the lower part, the middle part and the upper part of a planting system, an excellent water and fertilizer and soil environment is provided for planting on the mining wasteland, and the growth quantity and survival rate of the plants are guaranteed. The method has the advantages that the cost is low,the treatment effect is good, the structure is simple and water and fertilizer losses and secondary pollution are prevented, and is an environment-friendly repairing technology.

Description

technical field [0001] The invention relates to the field of environmental protection and plant cultivation, in particular to a method for plant cultivation in abandoned mine land. Background technique [0002] At present, phytoremediation is often used in the restoration of abandoned mines, but most of the abandoned mines have short vegetation growth, low biomass and low survival rate after phytoremediation. The main reasons are as follows: First, the soil quality of abandoned mines is relatively low. Ordinary soil has many pollutants, including heavy metal pollution and chemical agent pollution, and the soil surface deposits are thick, causing plants to absorb a large amount of pollutants and affecting their survival rate; After the water source is polluted by pollutants, the water quality deteriorates, and at the same time, the water on the soil surface is evaporated, resulting in insufficient water absorption by the plant roots, and the growth cannot be guaranteed. Poor...

AI Technical Summary

Problems solved by technology

[0002] At present, phytoremediation is often used in the restoration of abandoned mines, but most of the abandoned mines have short vegetation growth, low biomass and low survival rate after phytoremediation. The main reasons are as follows: First, the soil quality of abandoned mines is relatively Ordinary soil has many pollutants, including heavy metal pollution and chemical agent pollution, and the soil surface deposits are thick, causing plants to absorb a large amount of pollutants and affecting their survival rate; After the water source is polluted by pollutants, the water quality deteriorates, and at the same time, the water on the soil surface is evaporated, resulting in insufficient water absorption by the plant roots, and the growth cannot be guaranteed. Poor quality, low water and fertilizer retention capacity, large nutrient loss and insufficient nutrient supply in the soil

[0003] At the same time, most of the current mine phytoremediation methods are directly planted after covering the surface of the abandoned mine land with soil. For those abandoned mine lands with many types of pollutants and complex chemical properties, in order to isolate the impact of underground pollution sources on surface plants, it is only a simple method. Optimizing the covered soil material, the optimized soil adsorption is relatively simple, loses the ability to retain water and fertilizer, and cannot deal with a variety of pollutants, so it cannot guarantee the long-term stability of plants growing here. Due to the loss of soil water and fertilizer, pH, and pollutants, it seriously affects the restoration ability of the soil and the restoration effect on the landscape after planting.