Allylthiourea modified starch copolymer coated material and slow release fertilizer

The present invention relates to a modified starch allyl thiourea copolymers as coating materials and release fertilizer, the method comprising: Preparation of the coating materials as the main copolymer modified starch, slow release fertilizer. Solve the problem of optimized conditions for preparing coating materials, manufacturing process parameters and slow release fertilizers, slow release fertilizers and evaluation of the release effect. The slow release fertilizer of the process is simple, inexpensive coating agent for the coating material can also be used as the adhesive, release effect significantly, while the coating material can be completely degraded, the risk-free environment, to maximize reduce the use of fertilizers and fertilizer pollution of agricultural environment.