The invention discloses a special slow release
fertilizer for tobacco by using
biomass granular carbon as a matrix and a preparation method thereof. Granular carbon prepared from agricultural wastes such as corn cobs, peanut shells,
rice hulls, edible fungi matrix and the like are used as a matrix material; and based on the micro-pores and strong adsorption capability of the matrix material, the granular
biomass carbon-based special slow release
fertilizer for the tobacco is prepared by compounding the matrix material and
nitrogen,
phosphorus,
potassium and other nutritional elements required by growth and development of the tobacco. The
biomass granular carbon is black biomass granular carbon granules formed after the
agricultural waste biomass is incompletely burnt under the low-
oxygen condition, has multiple properties similar to
soil humus and strong adsorption and
nutrient and
moisture holding capabilities, can stimulate growth of crops, and has good slow release performance on
nitrogen,
phosphorus and
potassium; when the prepared slow release
fertilizer is applied at one time, the requirements of the tobacco for nutrients in the whole growth period can be effectively met; and the slow release fertilizer has the characteristics of increasing
soil fertility, improving the structure of soil, realizing high efficiency and environment friendliness and the like, and is beneficial to large-scale popularization and application in the production of the tobacco.