Special sustained-release fertilizer for watermelons by using biomass granular carbon and preparation method thereof

Abstract

The invention discloses a special sustained-release fertilizer for watermelons by using biomass granular carbon as a matrix and a preparation method thereof. Granular carbon prepared from corn cob, peanut hulls, rice hulls, edible fungus substrate and other agricultural waste biomasses is used as a matrix material, and is compounded with nitrogen, phosphor, potassium and other nutritional elements which are necessary to growth and development of watermelon by utilizing the microporosity and strong adsorptivity of the granular carbon to prepare the granular-biomass-carbon-based special sustained-release fertilizer for the watermelons. The biomass granular carbon used in the invention is black biomass granular carbon particles formed after agriculture waste biomass is incompletely combusted in a low-oxygen condition, has multiple properties similar to soil humus, has strong capacities of adsorbing and maintaining nutrition and moisture, and can be used for stimulating crop growth with good sustained release performance to nitrogen, phosphor and potassium, so that the requirement of watermelons for nutritions in the whole growing period can be effectively supplied when the prepared sustained release fertilizer is applied once. Furthermore, the fertilizer has the characteristics of increasing the soil productivity, improving the soil structure along with high efficiency and environmental friendliness and the like, and is advantageous to large-scale popularization and application in watermelon production.

Description

[0001] technical field [0002] The invention belongs to the technical field of agricultural fertilizer production, and in particular relates to a special slow-release fertilizer for watermelons with biomass granular carbon as a matrix and a preparation method thereof. Background technique [0003] In watermelon production, fertilization is an important measure to ensure yield and quality. Watermelon is a potassium-loving crop. Potassium deficiency will cause slow growth of watermelon plants, fragile stems, and dry leaf margins. Especially during the expansion period of watermelons, potassium deficiency will cause fragile transport tissues, hinder nutrient synthesis and transportation, and accumulate sugar. affected. Watermelon also has special requirements for nitrogen. Insufficient supply of nitrogen fertilizer will cause slow plant growth and small leaves, which will affect fruit expansion and low yield. Excessive nitrogen will result in leggy stems and leaves, delayed f...

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Problems solved by technology

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