Quicklime-powder-containing coated slow-release fertilizer capable of improving acidic soil and preparation method thereof

Abstract

The invention discloses a quicklime-powder-containing coated slow-release fertilizer capable of improving acidic soil and a preparation method thereof. The invention is characterized in that the fertilizer is prepared from the following raw materials in parts by weight: 3-5 parts of quicklime powder, 10-20 parts of acrylic acid, 30-50 parts of sodium alginate solution, 1-2 parts of sodium dodecyl benzene sulfonate, 1-2 parts of ammonium persulfate, 3-6 parts of N,N-methylene-bis acrylamide, 1-2 parts of waste manganese slag, 15-25 parts of polyvinyl alcohol, 3-5 parts of starch, 25-35 parts of urea, 10-16 parts of potassium hydrogen phosphate, 40-50 parts of calcium chloride solution and 50-100 parts of distilled water. The water retention agent is added into the crosslinked fluid and then sprayed on the fertilizer core, thereby overcoming the defect of high shedding tendency of the water retention agent when the water retention agent is directly attached to the core of the fertilizer; and thus, the fertilizer has obvious moisture retention effects. The crosslinked fluid can also achieve the goal of enhancing the water resistance of the fertilizer, and the fertilizer is biodegradable and environment-friendly. The added quicklime powder has the effect of improving acidic soil.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a coated slow-release fertilizer containing quicklime powder that can improve acidic soil and a preparation method thereof. [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 disci...

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.