Carbon-based slow-release fertilizer with high slow release capability and preparation method thereof

Abstract

The invention discloses a carbon-based slow-release fertilizer with high slow release capability. The carbon-based slow-release fertilizer is prepared from raw materials in parts by weight as follows: 15-18 parts of rice straw, 4-5 parts of a modified cassava starch solution, 1-3 parts of ferrous sulfate, 4-6 parts of ammonium nitrate, 1-2 parts of sodium carboxymethylcellulose, 12-16 parts of guar gum powder, 25-26 parts of feather meal, 3-5 parts of attapulgite, 3-6 parts of humic acid raw powder and 33-37 parts of bagasse. The carbon-based slow-release fertilizer can adsorb and stabilize nutrients in the fertilizer by the aid of porosity and large specific surface area; meanwhile, the carbon-based slow-release fertilizer has excellent biological chemistry stability, can remarkably reduce loss of soil nitrogen, maintains balance of soil ecosystem and has remarkable slow release capability, the use amount of the fertilizer can be reduced after application, the utilization rate of nutrients is increased, and the yield of crops and incomes are increased.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a carbon-based slow-release fertilizer with strong slow-release ability and a preparation method thereof. Background technique [0002] Biochar is an insoluble porous solid material formed by pyrolysis of plant biomass at low temperature. It has high biochemical stability. After entering the soil, it can significantly improve the physical and chemical properties of the soil. It is an excellent fertilizer Sustained release material. However, the use of biochar to make slow-release fertilizers is rarely used in the market at present. Most farmers are reluctant to use high-priced slow-release fertilizers due to cost considerations. Therefore, carbon-based slow-release fertilizers cannot be used on a large scale. At the same time, most of the polymer coating materials widely used in the market are non-degradable polymers, and the residue after application will damage the soi...

AI Technical Summary

Problems solved by technology

However, the use of biochar to make slow-release fertilizers is rarely used in the market at present. Most farmers are reluctant to use high-priced slow-release fertilizers due to cost considerations. Therefore, carbon-based slow-release fertilizers cannot be used on a large scale. At the same time, most of the polymer coating materials widely used in the market are non-degradable polymers, and the residue after application will damage the soil structure.