Cadmium pollution-continuous cropping obstacle facility agricultural soil production and remediation method

Abstract

The invention discloses a cadmium pollution-continuous cropping obstacle facility agricultural soil production and remediation method. The method comprises the following steps: (1) planting hyperaccumulated sedum alfredii hance on to-be-remediated soil, and performing mowing once after 4-6 months; (2) after mowing, directly sowing and intercropping 83-16 spring cucumbers of Holland on the soil, harvesting the spring cucumbers, and removing the hyperaccumulated sedum alfredii hance at the same time; (3) after removal, directly sowing the large-leaf white-stem water spinach in Hong Kong, and performing flooding treatment during growth; (4) after harvesting the Hong Kong large-leaf white-stem water spinach, applying a composite conditioner to the soil, and uniformly mixing the composite conditioner with plough layer soil; and (5) 6-8 days later, transplanting Holland 3099 autumn cucumbers, and performing cultivation until harvesting. According to the method, cadmium hyperaccumulator-continuous cropping obstacle crops-co-low accumulation aquatic vegetables-continuous cropping obstacle crops are used for crop rotation, the soil composite conditioner and reasonable moisture management are used in cooperation, the problem of continuous cropping obstacles is solved while cadmium pollution of facility agriculture soil is remediated, and safe production of vegetables is guaranteed.

Description

technical field [0001] The invention relates to the technical field of environmental treatment of polluted soil, in particular to a method for repairing while producing on the cadmium-polluted-continuous-cropping obstacle facility agricultural soil. Background technique [0002] The soil of facility agriculture is highly susceptible to the pollution of heavy metal cadmium, which leads to the reduction of crop yield and quality. The sources of cadmium pollution in the soil are very extensive. Mining, industrial waste discharge, sewage irrigation and irrational use of fertilizers are all reasons for the entry of cadmium into the soil of facility agriculture. my country's agricultural soil is seriously polluted by cadmium, and the area is increasing year by year. The environmental pollution caused by it has become increasingly prominent and needs to be solved urgently. Cadmium in the soil will not only affect plant growth and reduce crop yield, but also enter the food chain th...

AI Technical Summary

Problems solved by technology

Since the root exudates of cucumbers contain a large amount of autotoxic substances, continuous cropping obstacles are more likely to occur

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