Magnetic controlled-release fertilizer capable of improving soil water release and fertilizer maintenance capacity, and preparation method thereof

Abstract

The invention discloses a magnetic controlled-release fertilizer capable of improving soil water release and fertilizer maintenance capacity, and a preparation method thereof. The magnetic controlled-release fertilizer is prepared from following raw materials, by weight, 80 to 90 parts of weathered coal, 13 to 16 parts of magnesium sulfate, 20 to 22 parts of potassium chloride, 16 to 19 parts of tricalcium phosphate, 85 to 95 parts of fly ash, 230 to 250 parts of rape seed cake, 90 to 100 parts of rice chaff ash, 70 to 90 parts of iron pyrite ash, 36 to 38 parts of cassava starch, 5 to 8 parts of calcium acetate, 8 to 12 parts of a composite biological bacteria preparation, and an appropriate amount of water. According to the preparation method, raw materials, such as weathered coal and rice chaff ash, with excellent adsorbability are mixed with calcined ash with magnetization modification effect, adding of the magnetic controlled-release fertilizer into soil is capable of improving polymerization effect aggregate micelle in soil, realizing agglomeration of small particles in soil, obtaining relatively large microaggregates, reducing soil specific surface area, adhesion stress, and expansibility obviously, reducing soil volume weight, increasing soil interstices and water release and fertilizer maintenance capacity, and providing crop growth with beneficial environment.

Description

Technical field [0001] The invention relates to the technical field of fertilizers, in particular to a magnetized slow-release fertilizer for improving soil water release and fertilizer retention and a preparation method thereof. Background technique [0002] my country is a typical agricultural country with a large population and a small area of ​​arable land, and chemical fertilizers play a very important role in the production of crops. According to research, various physical and chemical changes will occur in the nitrogen, phosphorus, potassium and other nutrients applied to the soil. Among them, nitrogen will be lost through volatilization, leaching, denitrification, etc., while phosphorus is easily affected by Al in the soil. 3+ , Fe 3+ And Ca 2+ , Mg 2+ Various ions are fixed to form stable precipitates or form closed storage state phosphorus with iron and aluminum oxides, and gradually lose their effectiveness. These factors will cause the utilization rate of fertilizer a...

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 t