Slow-release fertilizer for silage corn and preparation method of slow-release fertilizer

By preparing porous carriers combined with agricultural waste, the problem of insufficient nutrient release of slow-release fertilizers in arid soils was solved, achieving efficient nutrient release and environmentally friendly slow-release effects, and improving resource utilization.

CN120965417APending Publication Date: 2025-11-18GUANGDONG OCEAN UNIVERSITY +1
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Patent Information

Application Number
CN202511170908.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-21
Publication Date
2025-11-18

AI Technical Summary

Technical Problem

Existing slow-release fertilizers cannot effectively release nutrients in arid soils, affecting crop growth. Furthermore, some raw materials are non-renewable, have low resource utilization rates, and pose a significant risk of environmental pollution.

Method used

A porous carrier was synthesized using zirconium dichlorocerocene and ethynylbiphenyl-3,3',5,5'-tetracarboxylic acid as raw materials. Combined with dipotassium hydrogen phosphate, ammonium chloride and agricultural waste, silage corn slow-release fertilizer was prepared through ultrasonic dispersion and cross-linking reaction to form a three-dimensional polymer network structure, which increases water retention capacity and slow-release performance.

Benefits of technology

It improves the nutrient release efficiency of fertilizers in sandy soils or arid regions, reduces the risk of environmental pollution, increases the utilization rate of agricultural waste, and extends the nutrient release time.

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Abstract

The invention provides a silage corn slow-release fertilizer and a preparation method thereof, and belongs to the technical field of slow-release fertilizers. The method comprises the following steps: mixing zirconocene dichloride and ethynyl biphenyl-3, 3 ', 5, 5'-tetracarboxylic acid, adding N, N-dimethylacetamide and water, reacting at 50-80 DEG C for 15-20 hours, cooling to room temperature, and washing with N, N-dimethylacetamide to obtain a porous carrier; mixing the porous carrier with dipotassium phosphate, ammonium chloride and water, and dispersing to obtain dispersion liquid; adding agricultural wastes into the dispersion liquid, uniformly stirring, slowly dropwise adding ammonium persulfate, and adding a monomer and a cross-linking agent to obtain a mixed solution; reacting for 1-2 hours at 60-80 DEG C in an inert atmosphere to obtain a semi-finished product; and washing and drying the obtained semi-finished product to obtain the silage corn slow-release fertilizer. The slow-release fertilizer provided by the invention can improve the water retention capacity of soil and prolong the nutrient release time, and is suitable for sandy soil or arid and semi-arid regions.
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