Special granular fertilizer for rice and preparation method

Abstract

A special granular fertilizer for rice comprises the elements according to the following proportions: zinc monohydrate, magnesium sulfate monohydrate, boric acid, monoammonium phosphate and ammonium chloride. The invention further provides a preparation method of the special granular fertilizer for rice. The preparation method comprises the following steps: 1, crushing: firstly crushing zinc monohydrate, magnesium sulfate monohydrate and boric acid trace elements respectively, mixing, packaging, and then crushing the monoammonium phosphate and the ammonium chloride respectively; 2, mixing: taking out a certain amount of the crushed monoammonium phosphate and a certain amount of the crushed ammonium chloride, and mixing with the packaged zinc monohydrate, magnesium sulfate monohydrate and boric acid trace elements to ensure uniform mixing of the trace elements during production; 3, granulating: sending the well-mixed raw material into a paired-roll extruding trough by using a conveyor belt, and performing extruding granulation; 4, sieving: sieving the extruded granules, sending qualified granules into a packaging machine, and recycling unqualified granules into the extruding troughfor granulating once more; 5, packaging: sending qualified products into the automatic packaging machine for packaging; 6, storage: inspecting packaged products by sampling, and storing qualified products.

Description

technical field [0001] The invention relates to a fertilizer and a preparation method, in particular to a special granular fertilizer "Wonongbao" for rice and a preparation method. Background technique [0002] Seven days after the rice is transplanted, farmers generally apply urea 10-20kg / mu, enough for the rice to turn green and tiller. Rice requires about 10-12 pure nitrogen throughout its growth period, however: [0003] 1. Farmers in the south generally apply too much urea, which leads to vigorous growth of rice, making the rice field airtight, prone to diseases and insect pests, and easy to lodging in the later stage, resulting in a failure of harvest; [0004] 2. Urea is not easily converted into ammonium nitrogen absorbed by rice under the low temperature of cold soaking field, which leads to stiff seedlings of rice and delayed growth of rice. Contents of the invention [0005] The problem to be solved by the present invention is that farmers generally apply too ...

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Problems solved by technology

[0005] The problem to be solved by the present invention is that farmers generally apply too much urea, which leads to vigorous growth of rice, airtight rice fields, easy disease and insect pests, and easy lodging in the later stage, resulting in no harvest; Absorbed ammonium nitrogen leads to stiff seedlings of rice and delays the growth period of rice. A special granular fertilizer for rice "Wonongbao" and its preparation method are provided.