Moisture-proof silicon-magnesium-boron-zinc composite granular fertilizer and preparation method thereof

Abstract

The invention relates to moisture-proof silicon-magnesium-boron-zinc composite granular fertilizer. The moisture-proof silicon-magnesium-boron-zinc composite granular fertilizer is prepared from 20-70% by weight of magnesium fertilizer, 10-30% by weight of silicon fertilizer, 5-10% by weight of boron fertilizer, 3-8% by weight of zinc fertilizer, 3-5% by weight of a binder, 3-8% by weight of an aid 1 and 5-56% by weight of an aid 2. The magnesium fertilizer is at least one of anhydrous magnesium sulfate, magnesium sulfate monohydrate, magnesium sulfate pentahydrate and magnesium sulfate heptahydrate. The silicon fertilizer is at least one of sodium silicate and sodium metasilicate. The boron fertilizer is at least one of borax, boric acid and boron-magnesium fertilizer. The zinc fertilizeris at least one of zinc sulfate heptahydrate, zinc sulfate monohydrate and zinc oxide. The binder is at least one of sodium carboxymethylcellulose and corn starch. The aid 1 comprises quicklime and calcium-magnesium phosphate fertilizer in a mass ratio of 1-8: 1. The aid 2 comprises high clay and attapulgite in a mass ratio of 1: 1-3. The moisture-proof silicon-magnesium-boron-zinc composite granular fertilizer has excellent anti-mildew properties, is not easy to agglomerate and has a high fertilizer utilization rate.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a moisture-proof silicon-magnesium-boron-zinc composite granular fertilizer and a preparation method thereof. Background technique [0002] The tropical and subtropical regions of South China have climate characteristics such as abundant heat, abundant precipitation, the same season of rain and heat, and a short frost-free period, and have unique advantages in agricultural production. However, the abundant heat and rainfall also accelerated soil mineralization and leaching of nutrient ions, resulting in serious shortages of Ca, Mg, Si, B, Zn and other nutrients essential for crop growth in the soil in this area, thus making The rotation of medium and trace elements is the "minimum nutrient" that limits the further increase of sugarcane yield, and has become one of the main restrictive factors for the improvement of crop yield and quality in the south. In addition, the soil acidificati...

AI Technical Summary

Problems solved by technology

However, both magnesium sulfate fertilizer and high-efficiency silicon fertilizer are deliquescent, easy to absorb moisture and agglomerate, and the phenomenon of self-dissolution and compaction is relatively serious in the process of packaging, storage and transportation, which not only increases the difficulty of its storage but also affects its application effect. Moreover, it significantly affects its application method, especially during the application process, it is more likely to absorb moisture, and when mixed with other fertilizers, it will affect the application performance of other fertilizers, especially increasing the difficulty of mechanized fertilization

Boron fertilizers mainly include boron chemical products such as boric acid, borax, and boron magnesium fertilizer. Such boron fertilizers have application problems such as poor solubility and low boron utilization rate.

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