Soil-improvement special slow release fertilizer for rice, and preparation method thereof

Abstract

The invention discloses a soil-improvement special slow release fertilizer for rice. The soil-improvement special slow release fertilizer for rice comprises 30-45wt% of powdery urea, 20-40wt% of urea phosphate, 8-15wt% of potassium chloride, 15-30wt% of a potash magnesium sulfate fertilizer, 2-8wt% of zinc humate, 1-6wt% of manganese humate, 1-5wt% of urea iron humate, 0.005-0.02wt% of compound sodium nitrophenolate, 1-5wt% of a slow release agent and 1.99-6wt% of an auxiliary material, wherein the slow release agent contains 5-15wt% of N-methylolacrylamide, 10-30wt% of an unsaturated polyester resin, 4-10wt% of cyclohexanol, 5-13wt% of 2-butanol, 1-5wt% of talcum powder, 1-4wt% of kaolin, 1-6wt% of ethyl cellulose, and the balance distilled water. The invention also discloses a preparation method of the soil-improvement special slow release fertilizer for rice.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a special slow-release fertilizer for soil improvement type rice and a preparation method thereof. Background technique [0002] The planting area of ​​food crops and economic crops in my country has been maintained at more than 1.5 billion mu all year round, but the soil fertility level of my country's cultivated land is generally low, and the phenomena of soil acidification and salinization are very prominent. According to statistics, the salinity and alkalinity of my country's northwest, northeast and coastal areas The total area of ​​wasteland and saline-alkali-damaged cultivated land exceeds 500 million mu, of which nearly 200 million mu has potential for agricultural use; my country's soil acidification is also very serious, and the soil pH value of about 226 million mu of cultivated land in the country is below 5.5. Soil acidification is intensified, and the...

AI Technical Summary

Problems solved by technology

In addition, a large number of Chinese farmers have migrated to cities to work, resulting in a shortage of young and middle-aged labor in rural areas, resulting in increased labor costs in large-scale agricultural production, especially bulk crops that require multiple fertilization, which is not only labor-intensive and time-consuming, but also inconvenient topdressing at the later stage of crop growth and increased production costs

my country has a large population and the average area of ​​cultivated land is very limited. It is of great significance to protect the existing cultivated land and improve the use of obstructive soil. In the production process of agricultural products, in order to increase production, it is necessary to use chemical fertilizers. However, the existing common chemical fertilizers are used in large quantities for a long time Finally, it will lead to deterioration of soil physical and chemical properties. At the same time, the existing common chemical fertilizers cannot slowly release nutrients, and the nutrient distribution ratio is not reasonable, and the mix of medium and trace elements is not appropriate, resulting in a certain degree of restriction on crop quality and yield and fertilizer nutrient utilization. The rate is low, pollutes the environment, needs to be improved urgently

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