Biocharcoal-based slow release fertilizer and preparation method thereof

Abstract

The invention discloses biocharcoal-based slow release fertilizer. The biocharcoal-based slow release fertilizer is prepared from biocharcoal and chemical fertilizer with the mass ratio being 20:(5 to10). The biocharcoal-based slow release fertilizer disclosed by the invention has the beneficial effects that agricultural and forest wastes such as straws with wide distribution, large yield and lowcost are adopted as biomass, has rich pore channels, is easily decomposed, is not deteriorated after being absorbed, is wear-resistant, and also has excellent adsorbing and ion-exchange properties, the fertility, the structure and microorganisms and the like of soil can be effectively improved, and the soil quality can be improved; shown from the cumulative released amount of nitrogen of the biocharcoal-based slow release fertilizer in water, the cumulative released amount of the nitrogen in 480 hours is about 80%, i.e., the cumulative released amount of nitrogen nutrients in 20 days is 80%.The invention also discloses a preparation method of the biocharcoal-based slow release fertilizer. The preparation method adopts a hydrothermal method to prepare the biocharcoal-based slow release fertilizer, the technology is manure, the operation is convenient, simple and easy, low cost, less investment and low energy consumption are achieved, and an economic and feasible technical means is provided for large-scale application of the biocharcoal-based slow release fertilizer.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, in particular to a biochar-based slow-release fertilizer and a preparation method thereof. Background technique [0002] Food is a necessity for human life and is related to social stability and development. In agricultural production, farmers usually increase the application of chemical fertilizers in order to increase the yield of crops. However, excessive use of chemical fertilizers not only fails to increase crop yields, but also increases costs, resulting in a large waste of resources and serious environmental pollution, such as soil acidification, water eutrophication, greenhouse gas and other air pollution, resulting in a series of ecological, social and economic question. In order to improve the utilization efficiency of chemical fertilizers and increase crop yields, research and design fertilizers that can release nutrients according to the law of crop fertilizer requirements, and ...

AI Technical Summary

Problems solved by technology

[0003] However, the current slow / controlled release fertilizers still have problems such as high production costs, high market prices, and high technical requirements, which are not conducive to marketing and promotion. Some high polymers are difficult to degrade and will pollute the soil. Damaged, relatively high requirements for storage and transportation conditions

For example, most of the current slow / controlled release fertilizers use coating or coating technology to block the release of fertilizers into the soil by coating the surface of the fertilizer with hydrophobic materials, but the coating and coating are easily damaged, and the coating is easy to wear during transportation. Moreover, the release of the coating is very slow before decomposition or dissolution, and a large amount of concentrated release after decomposition does not help the efficient use of fertilizers, but increases the cost

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