Carbon-based slow-release fertilizer with water and fertilizer retention capacity and preparation method of fertilizer

Abstract

The invention discloses a carbon-based slow-release fertilizer with the water and fertilizer retention capacity. The carbon-based slow-release fertilizer is prepared from raw materials in parts by weight as follows: 30-34 parts of air-dried silkworm excrement powder, 9-11 parts of vermiculite powder, 22-26 parts of rice straw, 4-6 parts of a modified tapioca starch solution, 4-6 parts of calcium superphosphate, 3-4 parts of potassium sulfate, 25-27 parts of rice chaff ash, 5-6 parts of attapulgite, 5-7 parts of raw humic acid powder and 14-16 parts of coconut chaff. According to the carbon-based slow-release fertilizer, the water absorption of fertilizer particles is enhanced greatly through addition of the raw materials such as the vermiculite powder, the coconut chaff and the like, moisture is stored for a long time for use of crops, and the dryness resistance capacity of the crops is improved; meanwhile, the content of soil organic matters is increased through addition of rice chaff ash and air-dried silkworm excrement powder, the soil fertility is improved; nutrient elements can be adsorbed by a slow release layer formed by the attapulgite, tapioca starch and the like, leaching loss of the fertilizer is reduced, and very good water retention and fertility improvement functions are realized.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a carbon-based slow-release fertilizer capable of retaining water and fertilizer and a preparation method thereof. Background technique [0002] Biochar is an insoluble porous solid substance 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. Slow release material. However, there are few applications of using biomass charcoal to make slow-release fertilizers in the market. 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 ...

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.