The invention relates to a natural
silicon compound coated slow release
fertilizer. The slow release
fertilizer is prepared by adopting a natural
silicon compound as a wrapper, adopting a disc
granulation and
fluidized bed method, bonding the wrapper to the surfaces of core
fertilizer particles through a binder, and enclosing via spraying the external surface with molten
wax. The
silicon compound comprising Chinese medical stone, natural sands, silica sand and the like contains the silicon element essential to plants, has a density and a good strength, is wrapped on the fertilizer surface to form a compact coat layer, and the compact coat layer is enclosed by strongly lyophobic
wax layer, so the slow release performance of a fertilizer is substantially enhanced. After the fertilizer is applied, nutrients are gradually released, natural
wax can be completely degraded, and
nutrient silicon can also be released by the silicon compound to meet the need of plants, so the secondary
pollution problem of routine resin coated fertilizers is overcome. The slow release fertilizer has the advantages of good slow release performance, high
hardness, good
wear resistance, low cost and
environmental protection, and can be widely applied to various plants comprising crops, vegetables, fruits, flowers and lawns.