Effect of rosin glysin ester as coating material on the slow release property of coated urea

Rosin glysin ester was used as the coating material to produce the coated fertilizers. The slow release properties of caoted urea were studied by the method of potted plant soil. The results showed that the early rate of nutrient released from coated-urea was 12.9%. According to the logistic growth model, when the coating coverage was 5%, the biggest nutrient release rate from coated urea was 96%, and the period of nutrient release was 146 days. When the coating coverage was 8.1%, the biggest nutrient release rate from coated urea was 97%, and the period of nutrient release was 194 days. The period of nutrient release varies with the coating coverage. Rosin glysin ester is a new choice for coating materials.