Soil remediation fertilizer

Abstract

The invention relates to the technical field of fertilizer, in particular to a soil remediation fertilizer. The soil remediation fertilizer is prepared from, by weight, 30-50 parts of urea, 25-30 parts of sodium nitrate, 20-25 parts of ammonium sulfate, 25-30 parts of urea phosphate, 10-15 parts of calcium phosphate, 20-30 parts of monopotassium phosphate, 15-20 parts of potassium sulfate, 8-12 parts of clay, 10-13 parts of siderite slag, 10-13 parts of limonite slag, 15-20 parts of bagasse, 10-18 parts of edible fungus residues, 12-16 parts of shell powder, 25-30 parts of modified red clay, 15-20 parts of modified kaolin and 15-25 parts of plant extract. The fertilizer is rich in nutrition and contains multiple macroelements and micronutrient elements necessary for crops, and the total nutrient content of nitrogen, phosphorus and potassium is larger than or equal to 69.7%; with the effective state-ineffective state conversion rate as the evaluation index of soil remediation, the conversion rate of the soil remediation fertilizer on soil cadmium metal reaches 99.84% or above, the conversion rate of the soil remediation fertilizer on soil copper metal reaches 91.48% or above, and the conversion rate of the soil remediation fertilizer on soil lead metal reaches 90.8% or above; taking peanuts as an example, the yield can be increased by 11-13.7%; the double benefits of obtaining a high yield and remediating soil with heavy metal are realized.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a soil repair fertilizer. Background technique [0002] With the rapid development of the economy and the advancement of industrial technology, the adverse impacts of industrial and agricultural production on the environment have been increasing. Due to the continuous accumulation and dumping of solid waste on the soil surface, harmful waste water has continuously penetrated into the soil, harmful gases and dust in the atmosphere It also continues to fall into the soil with rainwater, causing soil pollution. Among them, soil heavy metal pollution has become a prominent environmental problem that cannot be ignored. Heavy metal pollution in farmland soil is extremely harmful. Heavy metal pollution in soil will not only lead to crop yield reduction and quality degradation, but also enter the human body through the soil-plant system and food chain. , endangering human health and...

AI Technical Summary

Problems solved by technology

The control of soil pollution is mainly through engineering restoration methods and phytoremediation methods, of which engineering restoration methods mainly include soil improvement methods, electric restoration, soil leaching and heat treatment methods, etc. Engineering treatment measures are usually suitable for small polluted areas and serious pollutants. And the effect of the soil that is easy to spread is more obvious, which can fundamentally improve the soil, but the cost of treatment is high, and it is easy to form secondary pollution, and may damage the soil structure, which may easily lead to a decline in soil fertility

Phytoremediation technology is usually low-cost and can improve soil organic matter content and soil fertility, but plants have limited tolerance to heavy metal pollutants and are only suitable for moderately polluted soil remediation. At the same time, a plant can usually only remediate a certain heavy metal pollution Soil, and it is possible to activate other heavy metals in the soil, the effect on the compound pollution of various metals and organic matter is not good, the growth of hyperaccumulator plants is slow, and the restoration period is usually long, which is difficult to meet the requirements of rapid restoration of soil pollution; after research, Improving soil heavy metal pollution through the application of fertilizers is a new treatment method with low cost, controllable restoration, and environmentally friendly development. Therefore, it is necessary to develop a new type of farmland soil restoration that is low-cost, simple, efficient, and environmentally friendly. Fertilizers can not only increase crop production, but also effectively repair the pollution caused by heavy metals to the soil and reduce their content in the soil. It is of great significance and urgency to my country's agricultural development and fertilizer fields

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