Method for realizing soil remediation and safe production of water spinach by combining pteris vittata and foliage calcium spraying

Abstract

The invention discloses a method for realizing soil remediation and safe production of water spinach by combining pteris vittata and foliage calcium spraying, and relates to the technical field of soil remediation. The method specifically comprises the following operation steps: step 1, collecting and preparing arsenic-polluted soil: collecting polluted soil from an arsenic-polluted farmland or a vegetable base, and carrying out air drying, impurity removal and boxing; step 2, intercropping and planting pteris vittata and water spinach in a greenhouse, and spraying a calcium fertilizer. According to the method, soil arsenic hyperaccumulator pteris vittata is combined with a horticultural measure of foliage calcium spraying, so that the extraction efficiency of the hyperaccumulator on soil arsenic is improved, meanwhile, the accumulation amount of arsenic in water spinach is reduced, the effects of soil remediation and safe production of water spinach are achieved, and the problems that the mild contamination of arsenic in vegetable cultivation soil in facility agriculture in China is caused, the arsenic hyperaccumulator and the water spinach are not intercropped, the safety of vegetable production is difficult to ensure, and the polluted soil is difficult to repair and utilize simultaneously are solved.

Description

technical field [0001] The invention relates to soil restoration, in particular to a method for realizing soil restoration and safe production of water spinach by combining centipede grass and spraying calcium on leaves. Background technique [0002] Facility cultivation has promoted the production of vegetables in my country and achieved huge social and economic benefits. However, due to factors such as the use of arsenic-containing chemical fertilizers and organic fertilizers, the use of arsenic-containing chemical fertilizers and organic fertilizers has led to the continuous accumulation of arsenic in the soil, which obviously exceeds The background value of the soil has been exceeded, even reaching a slight or moderate degree of pollution. Water spinach is a vegetable that is often ingested by Chinese residents, but for the mild pollution of arsenic in the soil of vegetable cultivation in facility agriculture in my country, there is no super-rich arsenic. Intercropping pla...

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Problems solved by technology

[0002] Facility cultivation has promoted the production of vegetables in my country and achieved huge social and economic benefits. However, due to factors such as the use of arsenic-containing chemical fertilizers and organic fertilizers, the use of arsenic-containing chemical fertilizers and organic fertilizers has led to the continuous accumulation of arsenic in the soil, which obviously exceeds The background value of the soil has been exceeded, even reaching a slight or moderate degree of pollution. Water spinach is a vegetable that is often ingested by Chinese residents, but for the mild pollution of arsenic in the soil of vegetable cultivation in facility agriculture in my country, there is no super-rich arsenic. Intercropping plants and water spinach is difficult to ensure the safety of vegetable production, and it is difficult to remediate and reuse contaminated soil at the same time. At present, arsenic remediation in soil mostly uses a single physical, chemical or biological remediation method, lacking efficient remediation methods and Efficient planting technology

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