Magnetized controlled release fertilizer capable of resisting saline and alkaline land and preparation method of magnetized controlled release fertilizer

Abstract

The invention discloses magnetized controlled release fertilizer capable of resisting a saline and alkaline land and a preparation method of the magnetized controlled release fertilizer. The magnetized controlled release fertilizer is prepared from the following raw materials in parts by weight: 270 to 300 parts of soybean meal, 8 to 10 parts of rare earth, 50 to 70 parts of wheat gluten powder, 22 to 26 parts of copper humate, 140 to 160 parts of straw ash, 15 to 18 parts of potassium sulfate, 80 to 100 parts of fly ash, 60 to 70 parts of iron pyrite ash, 33 to 37 parts of cassava starch, 6 to 9 parts of calcium acetate, 12 to 16 parts of compound biological microbial inoculant and a proper amount of water. The fertilizer is magnetized and modified and organic materials including the straw ash, the wheat gluten powder and the like which have a relatively strong base ion adsorption capability are also added, so that mineral sediment in soil can be dissolved and is converted into effective nutrients to be absorbed by crops; meanwhile, the total salt content, total alkalinity, exchangeable sodium and pH value of a soil plough layer can be reduced, so that the solubility of soluble salt in the soil is reduced, the salt inhibition effect is realized and damage to the crops by soil salinity are alleviated.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a magnetized slow-release fertilizer for saline-alkali resistant land 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 application. T...

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