Soil improvement type special slow-release fertilizer for oilseed rape and preparation method thereof

Abstract

The invention discloses a soil improvement type special slow-release fertilizer for oilseed rape. The fertilizer comprises the following components in percentage by weight: 20-40% of powdered urea, 20-35% of urea phosphate, 10-15% of potassium chloride, 20-30% of potash magnesium sulfate fertilizer, 3-6% of humic acid boron salt, 1-4% of humic acid calcium salt, 1-5% of humic acid magnesium salt, 0.005-0.02% of compound sodium nitrophenolate, 1-5% of slow release agent and 2.99-8% of auxiliary material, wherein the slow release agent comprises the following components in percentage by weight: 5-15% of N-hydroxymethyl acrylamide, 10-30% of unsaturated polyester resin, 4-10% of cyclohexanol, 5-13% of 2-butyl alcohol, 1-5% of talcum powder, 1-4% of kaolin, 1-6% of ethyl cellulose and the balance of distilled water. The invention also discloses a preparation method of the soil improvement type special slow-release fertilizer for oilseed rape.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a special slow-release fertilizer for soil-improved rape and a preparation method thereof. Background technique [0002] The planting area of ​​food crops and cash crops in my country is maintained at more than 1.5 billion mu all year round, but the overall level of soil fertility in my country's arable land is relatively low, and the phenomenon of soil acidification and salinization is very prominent. The total area of ​​wasteland and saline-alkali barrier arable land exceeds 500 million mu, of which nearly 200 million mu have potential for agricultural utilization; my country's soil acidification is also very serious. About 226 million mu of cultivated land in the country has a soil pH value below 5.5, and the cultivated land in southern and eastern regions is below 5.5. Soil acidification intensified, and the acidification area gradually increased and the acidif...

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 release nutrients slowly, and the nutrient distribution ratio is not reasonable, and the trace elements are not properly matched, which leads to a certain degree of restriction on crop quality and yield and fertilizer nutrient utilization. Low, pollutes the environment and needs to be improved urgently

Images