Slow-release compound fertilizer with drought resisting, water retention and soil improvement functions and preparation method thereof

Abstract

The invention relates to slow-release compound fertilizer with drought resisting, water retention and soil improvement functions and a preparation method thereof and belongs to the technical field ofcontrolled-release fertilizer. The slow-release compound fertilizer provided by the invention is prepared by taking urea, monoammonium phosphate, potassium fertilizer, a medium and trace element mixture, a filling material, a urease inhibitor, celestine powder, weathered coal, epoxy resin, corn starch, a water retention agent and a compound microorganism bacterium agent as raw materials through arotary drum steam granulation technology. The water retention agent is used as a carrier of fertilizer nutrients and organic and inorganic harmful substances are not remained; moisture evaporation iseffectively inhibited and water and soil loss is prevented; meanwhile, the fertilizer nutrients can be adsorbed and combined and release of the fertilizer nutrients is delayed, so that the loss of thefertilizer nutrients of soil is reduced. The added celestine powder contains rich strontium element, has a promotion effect on the growth of crops and also has a killing effect on harmful bacteria inthe soil; the celestine powder is mutually matched with the compound microorganism bacterium agent, so that the disease-resisting capability of the soil is effectively improved and a soil structure is adjusted.

Description

technical field [0001] The invention relates to a slow-release compound fertilizer with the function of drought resistance, water retention and soil improvement and a preparation method thereof, belonging to the technical field of controlled release fertilizers. Background technique [0002] As the global climate warms, the drought intensifies, and the drought-affected area of ​​agriculture continues to expand. Therefore, increasing the water content in the soil, improving the physical and chemical properties of the soil, and strengthening its water and fertilizer retention capacity have become an important link in drought resistance, water saving and sustainable agricultural development. The impact of drought on dryland agriculture is mainly manifested in the inconsistency between natural rainfall and water demand for crop growth. Therefore, how to encourage the soil to retain more rainwater and provide plants with "when needed" is the main problem of water conservation in ...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the preparation of water-retaining slow-release fertilizers is to place the slow-release fertilizer in the reactor, so that the polymerized monomer stock solution can directly trigger the polymerization coating on the surface of the fertilizer. prone to adhesion

And it is difficult for large-scale industrial production, the process flow is long, the output is low, and the cost is high

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