Rice fields are planted year after year. Not only do they absorb a large amount of nitrogen, phosphorus, potassium and a certain amount of calcium, magnesium, sulfur, iron and other elements from the soil, but also absorb a small amount of chlorine, zinc, manganese, boron, copper, Trace elements such as molybdenum, a large number of various nutrients are absorbed, and some are lost by leaching. Only inorganic fertilizer supplement can not meet the needs of rice production, and organic fertilizer and inorganic fertilizer must be applied together.
The application of organic fertilizer can not only provide various nutrients directly to rice, but also humify a part of organic matter during the decomposition of organic matter by soil microorganisms to synthesize soil humus, which improves soil physical properties and The structure has a great effect in increasing the quantity and quality of soil colloids and improving the ability of soil to ensure fertilizer and fertilizer supply.
In addition, in the process of decomposition of organic matter, part of the soil in the paddy soil can be activated by the late-acting phosphorus and potassium, and various physiologically active substances that promote rice growth, vitamin B and auxin are produced.
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