Safety plantation method for heavy-metal-polluted farmland

Abstract

The invention belongs to the soil pollution treatment direction in the environment field, and particularly relates to a safety plantation method for a heavy-metal-polluted farmland. The safety plantation method includes the following steps that polluted soil, with the depth being 20 cm to 30 cm of the plough layer of the farmland is dug out and removed, a stabilizer is added in the polluted soil which is dug out, and uniform stirring is conducted; a plow pan obtained after digging is covered with a layer of obstructing pad with the thickness being 2 cm to 3 cm, and then the soil which is dug out is moved back to an obstructing pad at the original position; a protection layer is laid on the surface of the soil used for backfilling; crops are planted; complex microbial inoculants or earthworms are added in the soil used for backfilling; and in the robust growth period of the crops, a leaf surface obstructing agent is sprayed on the crops 2 times to 3 times. The safety plantation method is suitable for treatment and application of stabilized repair of farmland heavy metal soil, the process is simple and feasible, low in cost and remarkable in soil heavy metal stabilization effect, the soil repaired through the process can be directly used, and the heavy metal content of the crops planted in the stabilized soil confirms to the national standard.

Description

technical field [0001] The invention belongs to the direction of soil pollution control in the environmental field, and in particular relates to a safe planting method for heavy metal polluted farmland. Background technique [0002] Soil is the material basis for human survival. The quality of the soil environment affects the yield and quality of agricultural products. Soil pollution directly threatens human health through the food chain. In recent years, the area of ​​soil pollution of cultivated land in my country has continued unabated, especially the pollution of heavy metals. It is imminent to establish a safe planting model. [0003] At present, the heavy metal pollution of soil is an increasingly serious environmental problem, which has aroused widespread concern. Soil heavy metal pollution is an environmental problem that all countries in the world have to face. Once the land is polluted by heavy metals, it loses its ability to produce to a large extent. Soil heav...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a safe planting method for heavy metal-contaminated farmland, which has simple process and low cost, is suitable for large-scale promotion, and overcomes the problem that farmers cannot be planted normally and affect farmers’ income during the too long treatment period

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