Organosilicone water soluble long-acting compound fertilizer and preparation method thereof

The invention belongs to the technical field of enveloping type slow controlled release long-acting compound fertilizers, adopts organosilicone to clad compound fertilizer particles, forms an environment-friendly slow controlled release compound fertilizer, and further relates to a preparation method of the compound fertilizer. The organosilicone water soluble long-acting compound fertilizer is formed by a water soluble particle core and a hydrophobicity polymer outer enveloping layer. The preparation method is 1 preparing the water soluble particle core, enabling urea, triple superphosphate and potassium chloride to serve as main nutrient elements, smashing, mixing, prilling and drying to obtain particle fertilizers and enabling the particle fertilizers to serve as cores of enveloping fertilizers; 2 preparing an enveloping agent, enabling monomethyl trichlorosilane to serve as main raw materials, conducting cohydrolysis and condensation, and preparing modified organosilicone methyl silicone resin polymers after washing and disacidification; and 3 enveloping, putting the water soluble particle core in an enveloping machine, preheating, spraying the enveloping agent at interval, heating and keeping warm, conducting dehydration polycondensation crosslinking solidification, and forming a hydrophobicity methyl silicone resin film on the surface of the particle core of the fertilizer. The organosilicone water soluble long-acting compound fertilizer is free of the three wastes and free of toxic and side effects and environmental contamination in the whole manufacture and using processes, and belongs to environment-friendly products.