松香甘油酯包膜材料对尿素缓释性的影响

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

摘要: 该文以松香甘油酯为包膜材料，生产包膜尿素，并利用盆栽土壤试验法，研究以松香甘油酯为包膜材料的包膜尿素缓释性能。结果表明：C=5%其初溶出率均为12.9%。用LOGISTIC生长曲线模型进行模拟，得到涂层覆盖率C=5%时，其最大养分释放量为96%，养分释放期为146 d；涂层覆盖率C=8.1%时，其最大养分释放量为97%，养分释放期为194 d，这表明：控制涂层覆盖率，可控制肥料释放周期；松香甘油酯为包膜材料的选用开辟了新的途径。

Abstract: 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.