Nutrient regulation and control agent for reducing lead and cadmium content of leaf vegetables and using method thereof

Abstract

The invention discloses a nutrient regulation and control agent for reducing the lead and cadmium content of leaf vegetables, which comprises the following substances in percentage by weight: 18%-24% of sodium silicate, 16%-20% of calcium carbonate, 9%-12% of magnesium sulfate, 22%-30% of urea, 9%-11% of diammonium phosphate and 16%-21% of potassium sulfate. The using method of the nutrient regulation and control agent comprises the following steps: before planting the vegetable, uniformly mixing the sodium silicate, calcium carbonate, magnesium sulfate, urea, diammonium phosphate and potassium sulfate to obtain a mixture; base-applying all of the mixture, 20-60 kg per mu; turning over and harrowing uniformly so that the regulation and control agent and the polluted soil are uniformly mixed and seeding or transplanting can be performed; or base-applying half of the mixture, and uniformly dispersing the other half of the mixture into the soil after final singling of seedlings; and loosening the soil and sprinkling water. The regulation and control agent of the embodiment of the invention reduces the bioactivity of heavy metals in the soil, reduces absorption of the heavy metals of the leaf vegetable and improves the soil fertility.

Description

technical field [0001] The invention relates to a regulating agent, in particular to a nutritional regulating agent for reducing the content of lead and cadmium in leafy vegetables. Background technique [0002] Due to the unreasonable application of urban sludge, garbage and agricultural chemicals and the discharge of industrial "three wastes", the input of heavy metals in vegetable soil is increasing, which intensifies the pollution of heavy metals to vegetable soil, resulting in the detection of heavy metals in agricultural products. The yield is high. Green leafy vegetables have a strong ability to absorb and enrich heavy metals, and are the most vulnerable vegetables to heavy metal pollution. It is difficult to guarantee their safety when planted on vegetable fields polluted by heavy metals. In addition, in the process of vegetable production, a large number of continuous and unreasonable fertilization has resulted in the deterioration of the physical and chemical prop...

AI Technical Summary

Problems solved by technology

[0004] Due to the complex relationship between the chemical properties of vegetable soil and crop absorption, the amount of existing heavy metal-polluted soil regulators is much higher than that of normal fertilizers, and the effect is often unstable or adversely affects the soil properties and structure. and other defects, so that the restoration effect is not ideal, which directly affects the continuous application of regulators; in addition, the soil nutrients cannot be replenished in time during the restoration process.