Carbon-based slow release fertilizer with high phosphorus content and preparation method of fertilizer

Abstract

The invention discloses carbon-based slow release fertilizer with high phosphorus content. The fertilizer is prepared from raw materials in parts by weight as follows: 19-23 parts of rice straw, 3-5 parts of monocalcium phosphate, 4-5 parts of a modified cassava starch solution, 5-8 parts of ammonium bicarbonate, 8-12 parts of ground phosphate rock, 28-32 parts of pig bone meal, 5-7 parts of attapulgite, 3-5 parts of raw humic acid powder, 16-18 parts of walnut shell flour and 19-21 parts of scale powder. The carbon-based slow release fertilizer is applicable to phosphorus-deficient soil, the added raw materials such as the monocalcium phosphate, the bone meal and the like can significantly increase the content of rapidly available phosphorus in the soil after applied, meanwhile, gathering of nitrogen, phosphorus and potassium elements in soil can be promoted due to porosity and strong adsorbability of a carbon-based slow release layer, the fertilizer can keep the higher nutrient element supply within a longer period after applied, stable absorption of phosphorus by crops is guaranteed, the product yield is increased, and the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a carbon-based slow-release fertilizer with high phosphorus content 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 soil st...

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.