Preparation method for controlled-release fertilizer special for mechanically applied rice

Abstract

The invention relates to a preparation method for controlled-release fertilizer special for mechanically applied rice. The preparation method comprises the following steps: performing double-layer coating by using high tower pelleting compound fertilizer as core fertilizer to obtain the corresponding double-layer coating controlled-release fertilizer I, double-layer coating controlled-release fertilizer II and double-layer coating controlled-release fertilizer III, wherein the bottom layer urea coating accounts for 4 to 6 weight percent of the core fertilizer, and the outer layer film coating agent accounts for 2 weight percent, 4 weight percent and 6 weight percent of the urea coated fertilizer respectively based on the total weight of the reclaimed polyethylene film resin and the reclaimed polystyrene foam resin; and mixing the double-layer coating controlled-release fertilizer I, the double-layer coating controlled-release fertilizer II and the double-layer coating controlled-release fertilizer III according to the mass ratio of 1:(1-3):(1-2) to obtain the controlled-release fertilizer special for mechanically applied rice. The controlled-release fertilizer special for mechanically applied rice meets the absorption requirements of the rice on nitrogen, phosphorus and potassium nutrients in the growth stage, is difficult to crush and is suitable for mechanical fertilizer application.

Description

technical field [0001] The invention relates to a preparation method of a special controlled-release fertilizer for rice suitable for mechanical application, and belongs to the technical field of fertilizer production and application. Background technique [0002] Rice is one of the most important grain crops in my country. The national planting area accounts for about 30% of the grain crop area, and the output is close to half of the total grain output. At present, the national planting area exceeds 400 million mu. With the adjustment of agricultural structure and the transfer of rural labor force, the management of rice planting needs to be upgraded urgently. In the 21st century, the mechanization of rice harvesting in my country has developed rapidly. Although the development of rice planting mechanization is slow, with the continuous improvement of plug seedling raising technology and transplanting machinery, it will also promote the further development of rice planting...

AI Technical Summary

Problems solved by technology

The common feature of the above fertilizers is that some of the coating materials in the formula have poor toughness and anti-friction ability, and the outer film of the prepared fertilizer is easily broken, which is not suitable for mechanical fertilization; secondly, they are prepared from different fertilizer varieties, and their particles are uniform Poor performance; moreover, the zinc fertilizer contained is in the form of powder, which is easy to make the mechanical fertilization uneven

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