Multifunctional sustained or controlled release fertilizer additive

Abstract

The invention discloses a multifunctional sustained or controlled release fertilizer additive and belongs to the technical field of fertilizer additives. The multifunctional sustained or controlled release fertilizer additive is prepared by, by weight, 10-20% of lignin, 10-20% of ammoxidized lignin , 10-14% of humic acid, 10-14% of dicyandiamide, 4-8% of modified high-surface-activity mineral powder, 10-20% of compound micro-fertilizer, 10-16% of traditional Chinese medicine formula, 4-8% of potassium monopersulfate, 2-5% of starch and the rest water. Lignin and ammoxidized lignin are added, so that fertilizer effect can be released slowly, and the multifunctional sustained or controlled release fertilizer additive can serve as a synergist of nitrogen fertilizer; agricultural waste can be utilized, so that agricultural recycling is realized, and agricultural cost is reduced; the traditional Chinese medicine formula and potassium monopersulfate are added, so that the additive has insecticidal and bacterial effect, and crop pest and bacterial disease can be prevented without causing drug residue and secondary environment pollution.

Description

technical field [0001] The invention relates to the technical field of fertilizer additives, in particular to a multifunctional slow and controlled release fertilizer additive. Background technique [0002] Fertilizer is one of the important means of agricultural production, and the scientific use of fertilizer is the key to high-yield, high-quality and efficient agriculture. In my country, a prominent problem in the use of chemical fertilizers is the low utilization rate of fertilizers, especially nitrogen fertilizers, which are only about 30% to 35% in the current season. The main reason is that fertilizer nutrients are released from granular fertilizers too quickly. The crops cannot fully absorb it in time, and the applied nitrogen fertilizer will be converted into nitrate nitrogen under the action of nitrifying bacteria after 1-2 weeks in the soil. If it is rained or flooded, it will be washed into the deep soil and groundwater. resulting in groundwater pollution. [000...

AI Technical Summary

Problems solved by technology

Commonly used wrapping materials include inorganic minerals and polyolefin-based high-molecular organic compounds. Inorganic mineral materials have a wide range of sources and low prices. After the fertilizer nutrients are released, the empty shells remaining in the soil can be broken by themselves. The disadvantages are: The controlled release effect is poor, and the nutrient content is low; the polymeric organic compound coating with polyolefin as the main body has better water blocking performance, the surface of the coating is smoother and thinner, and the sustained release effect is better, but the disadvantage is high cost. It is mainly used in the cultivation of flowers, vegetables, fruits, lawns, etc. with high economic value. It is rarely used in food crops, and the film remaining in the soil cannot be completely degraded, which will cause secondary pollution to the environment; currently existing Slow and controlled release fertilizers with inhibitors are mostly products with a single inhibitor, such as long-acting urea with urease inhibitor hydroquinone, long-acting ammonium bicarbonate with nitrification inhibitor dicyandiamide, etc. The effect is not obvious, and the function is single

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