Safe production method of calcareous medium-light cadmium polluted vegetable field spinach

Abstract

The invention discloses a safe production method of spinach in a calcareous medium-light cadmium polluted vegetable field. The safe production method comprises the following steps: S1, screening to obtain an optimal soil conditioner product, an optimal spinach variety and an optimal leaf surface resistance and control agent product; s2, uniformly spreading the optimal soil conditioner product on the earth surface of a medium-light cadmium-polluted vegetable field, then irrigating, and mechanically ploughing and uniformly raking at a proper time; s3, planting an optimal spinach variety; and S4, spraying the optimal leaf surface resistance and control agent product. The method is suitable for the technical field of safe utilization of cadmium-polluted soil, adopts comprehensive agricultural measures of the low-cadmium-accumulation spinach variety, the soil conditioner and the leaf surface resistance and control agent, can ensure that the cadmium content of the spinach in the medium-light cadmium-polluted vegetable field does not exceed the standard, realizes safe production of the spinach in the medium-light cadmium-polluted vegetable field, has the characteristics of economy, safety, high efficiency, simplicity and easiness in realization, and has a wide application prospect. Wide application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of safe utilization of cadmium-contaminated soil, in particular to a safe production method of calcareous medium-light cadmium-contaminated spinach in vegetable fields. Background technique [0002] According to the 2014 National Soil Pollution Survey Bulletin, the over-standard rate of arable land soil sites was 19.4%, mainly due to inorganic heavy metal pollutants. Among them, the over-standard rate of cadmium (Cd) pollution sites ranked first in heavy metal pollution. Up to 7.0% (Chen Nengchang, Zheng Yuji, He Xiaofeng, et al. Analysis of "National Soil Pollution Survey Bulletin" [J]. Journal of Agricultural and Environmental Sciences, 2017, 36(9):1689-1692.). One of the overall goals of the "Soil Pollution Prevention and Control Action Plan" is to predict that by 2030, the safe utilization rate of contaminated vegetable fields will reach more than 95%. It is particularly important and urgent to use simp...

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Problems solved by technology

[0005] However, there are a series of problems and deficiencies in the existing technology: 1) There is still a lack of special technology for alkaline cadmium-contaminated soil in the north. Due to the constraints of physical and chemical properties and external environmental conditions, the applicability of the existing safe utilization technology for cadmium-contaminated vegetable fields in alkaline vegetable fields is not ideal; "Safe utilization method of cadmium-contaminated vegetable field based on oil crops" (ZL 2018115711678), "A safe utilization method of cadmium-contaminated vegetable field based on multifunctional crop sweet sorghum" (ZL 2018115711678), "A method for acidic cadmium-contaminated vegetable field Soil remediation agent for fields and its preparation method and use method" (ZL 202110197137.0); 3) The existing technology mainly targets rice as a crop, but lacks safe production technology for vegetables, such as "a method for cadmium-resistant enrichment cultivation of rice" (202111190487.0)

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