Heavy metal harm reducing magnetization slow-release fertilizer and preparation method thereof

Abstract

The present invention discloses a heavy metal harm reducing magnetization slow-release fertilizer and a preparation method thereof, the magnetization slow-release fertilizer comprises the following parts by weight of raw materials: 200-240 parts of rapeseed cake powder, 24-26 parts of calcium ammonium nitrate, 30-35 parts of potassium dihydrogen phosphate, 160-180 parts of bagasse, 15-20 parts of actinolite powder, 7-9 parts of zinc sulfate powder, 70-80 parts of fly ash, 45-55 parts of pyrite ash, 20-24 parts of tapioca starch, 4-6 parts of calcium acetate, 10-12 parts of a complex biological agent and proper amount of water; the magnetization slow-release fertilizer is prepared in inorganic and organic mixing manner, can effectively improve the nutrient content of the fertilizer, through double magnetization of the fertilizer and activation of the actinolite powder and other raw materials, crop root superoxide dismutase and catalase activity can be significantly improved, oxidative stress caused by residual heavy metals in soil can be eliminated, the integrity of root cell membranes can be maintained, plant tolerance to heavy metals can be enhanced, plants can be prevented from harm and harm to plants can be reduced.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a magnetized slow-release fertilizer which reduces the harm of heavy metals and a preparation method thereof. Background technique [0002] my country is a typical large agricultural country with a large population and little arable land, and chemical fertilizers play a very important role in the production of crops. According to the research, the nitrogen, phosphorus, potassium and other nutrients applied to the soil will undergo various physical and chemical changes, among which nitrogen will be lost through volatilization, leaching, denitrification, etc., and phosphorus is easily absorbed by Al in the soil. 3+ , Fe 3+ and Ca 2+ , Mg 2+ And other ions are fixed to form stable precipitates or form closed storage state phosphorus with iron, aluminum oxides, etc., and gradually lose their effectiveness. These factors will reduce the utilization rate of fertilizer applicati...

AI Technical Summary

Problems solved by technology

According to the research, the nitrogen, phosphorus, potassium and other nutrients applied to the soil will undergo various physical and chemical changes, among which nitrogen will be lost through volatilization, leaching, denitrification, etc., and phosphorus is easily absorbed by Al in the soil. 3+ , Fe 3+ and Ca 2+ , Mg 2+ and other ions are fixed to form stable precipitates or form closed storage phosphorus with iron, aluminum oxides, etc. and gradually lose their effectiveness

These factors will lead to a reduction in the utilization rate of chemical fertilizers

The use of chemical fertilizers will also bring environmental pollution, such as the greenhouse effect, eutrophication of water bodies, etc.