A special controlled-release fertilizer for rice based on rice-vegetable continuous cropping and preparation method thereof

Abstract

The invention relates to a special controlled-release fertilizer for paddy rice based on continuous cropping and planting of paddy rice and vegetables and a preparation method of the special controlled-release fertilizer. The p special controlled-release fertilizer comprises the following raw materials in parts by mass: 180-210 parts of coated urea, 150-170 parts of urea, 55-65 parts of diammonium phosphate, 250-350 parts of a calcium magnesium phosphate fertilizer, 140-180 parts of potassium chloride, 50-70 parts of humic acid, 10-20 parts of a polyaspartic chelated zinc fertilizer, 25-35 parts of fume residues, 2-5 parts of a polyacrylamide water-retaining agent and 10-15 parts of a polyaspartic chelated boron fertilizer. The special controlled-release fertilizer for paddy rice provided by the invention is applied at one time as a base fertilizer without topdressing, so that residual nutrients of preceding vegetables can be fully utilized and the investment can be reduced. Moreover, the special controlled-release fertilizer for paddy rice provided by the invention can be used for avoiding the problem that the controlled-release fertilizer which is applied floats. According to the controlled-release fertilizer provided by the invention, the fertilizing amount can be reduced, the fertilizer utilization ratio and the rice yield can be improved, and the controlled-release fertilizer has relatively high practical value.

Description

technical field [0001] The invention relates to a special controlled-release fertilizer for rice based on rice-vegetable continuous cropping and a preparation method thereof, belonging to the technical field of special fertilizers. Background technique [0002] Hainan is the largest tropical region in China, with an average annual temperature of 22-26°C, abundant rainfall, and the same season of rain and heat, which is suitable for crop growth throughout the year. In recent years, according to Hainan's unique climatic conditions and market demand, Hainan Province has adjusted the structure of Hainan's agriculture, proposed the development of tropical high-efficiency agriculture, and vigorously developed winter melons and vegetables. The area of ​​winter melons and vegetables is expanding year by year, and has become a pillar industry in Hainan. Due to factors such as land resources and water source conditions, most of the winter melons and vegetables are grown in paddy fiel...

AI Technical Summary

Problems solved by technology

[0004] However, there is currently no rice-specific controlled-release fertilizer for continuous cropping of rice and vegetables. The existing rice-specific fertilizers or controlled-release fertilizers cannot meet this requirement. Inconsistent with the absorption of rice, the release is too fast and burns the seedlings, or the nutrient release is slow, which cannot meet the nutrient needs of rice. In addition, because the specific gravity of many controlled-release fertilizers is smaller than that of water, the fertilizer floats to the water surface, wasting nutrients and causing nutrient volatilization

Images