Three-dimensional elastic solid mesh nest controlled-release fertilizer and preparation method thereof

Abstract

The invention relates to a three-dimensional elastic solid mesh nest controlled-release fertilizer and a preparation method thereof. The three-dimensional elastic solid mesh nest controlled-release fertilizer comprises the following ingredients in percentage by weight: 20-30 percent of urea, 25-30 percent of dispersing agent, 5-8 percent of emulsifying agent, 35-45 percent of cross-linking agent,1-5 percent of zinc sulfate, and 0.5-1.5 percent of carboxymethylcellulose. A three-dimensional elastic solid mesh nest is formed through carrying out a catalytic crosslinking and polymerization process on the ingredients and various nutrient elements; a solid mesh nest micropore has the functions of expansion when meeting water as well as expansion caused by heat and contraction caused by cold, so that the three-dimensional elastic solid mesh nest has stronger water absorbability, can be expanded multiply when meeting the water, and has elasticity and the function of expansion caused by heatand contraction caused by cold due to the solid mesh nest micropore which has elasticity and mucosity and can be expanded. The three-dimensional elastic solid mesh nest controlled-release fertilizer wholly adopts water-soluble matters, is environmental-friendly, has no residue, has the fertilizer utilization ratio being about 75 percent, has the functions of resisting drought and holding moisture, can be used for improving soil when being used for a long time, and has the functions of resisting drought, conserving fertility, holding moisture and improving fertilizer efficiency.

Description

technical field [0001] The invention belongs to the field of fertilizers, and relates to a controlled-release fertilizer, in particular to a three-dimensional elastic three-dimensional net nest control fertilizer and a preparation method thereof. Background technique [0002] Fertilizer is one of the most important means of production in agricultural production and the material basis for the sustainable development of agriculture. In recent years, due to the loss and inefficient use of fertilizers, serious resource waste and huge economic losses have been caused, and more importantly, serious pollution has been caused to the human body, the atmosphere, soil and food. Therefore, how to improve the utilization rate of fertilizers and organically combine the application of fertilizers with the yield, quality and environmental protection of crops has become the focus of special attention in the field of fertilizer research. [0003] At present, chemically synthesized slow-relea...

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Problems solved by technology

[0003] At present, chemically synthesized slow-release fertilizers represented by urea-formaldehyde are currently the most mature and widely used slow-release fertilizers; although adding urease inhibitors or nitrification inhibitors to steady-state fertilizers can improve fertilizer utilization, it cannot prevent The leaching of fertilizers; the amount of sulfur in sulfur-coated urea is large, the nutrients inside it are not easy to overflow, and the coating layer is easy to oxidize and break, and long-term use will cause acidification of the soil; the sealing of inorganic mineral salt-coated slow-release fertilizers Poor, the nutrients are easy to dissolve quickly, and the film layer is easy to fall off; the slow-release performance of the organic polymer coating is very good, but the solvent used in its production and the coating material itself are not degradable, which brings difficulties to its production and application. to environmental pollution

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