Environment-friendly film-coated slow release fertilizer with low cost and water-retention function and preparation method thereof

Abstract

The invention discloses an environment-friendly film-coated slow release fertilizer with low cost and a water-retention function and a preparation method thereof. The environment-friendly film-coated slow release fertilizer is characterized by containing the following materials in parts by weight: 20-30 parts of guar gum, 10-20 parts of acrylic acid, 20-30 parts of sodium alginate solution, 20-30 parts of borax solution, 1-2 parts of ammonium persulfate, 3-6 parts of N, N-methylene bisacrylamide, 2-3 parts of attapulgite, 15-25 parts of polyvinyl alcohol, 3-5 parts of starch, 25-35 parts of urea, 8-15 parts of potassium hydrogen phosphate and 50-100 parts of distilled water. The environment-friendly film-coated slow release fertilizer and the preparation method disclosed by the invention have the advantages that a water retention agent is added into crosslinking liquid, and then is sprayed onto fertilizer cores, so that the defect of easy falling of the water retention agent when the water retention agent is bonded on the fertilizer cores are overcome, and the water retention effect of the fertilizer is obvious; simultaneously, the crosslinking liquid also can realize the purpose of enhancing the water resistance of the fertilizer; and the guar gum is used as an inner coating film of the fertilizer, so that the cost of the fertilizer is reduced, and the slow release property and the water retention property are better.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a preparation method of an environmentally friendly coated slow-release fertilizer with low cost and water retention function. [0002] technical background [0003] Coated slow / controlled release fertilizer is based on granular chemical fertilizer, and the surface is coated with a layer of slightly water-soluble inorganic or organic polymer, which can change the release characteristics of fertilizer nutrients, prolong or control the release of fertilizer nutrients, A new type of fertilizer that coordinates the release of nutrients with the fertilizer requirements of crops. The development of this kind of fertilizer has put forward new ideas for improving fertilizer utilization rate, reducing environmental pollution, and developing labor-saving and labor-saving modern agriculture. Therefore, researchers in fertilizer science, soil science, environmental science, chemistry and other di...

AI Technical Summary

Problems solved by technology

[0004] Ni Boli prepared a water-retaining slow-release fertilizer by using sodium alginate and polyacrylic acid in his postgraduate dissertation "Preparation and Performance Research of Environmentally Friendly Multifunctional Slow- and Controlled-Release Fertilizer", but there are still water-retaining agents that are easy to fall off, including The water resistance of the membrane needs to be improved, and the slow release performance is not good.