Abstract:

Three kinds of controlled-release fertilizers, Osmocote, Meister and the sample of China, coated by organic polymer, were used in this study. The nutrient release rate of fertilizers were tested and compared in water. The effect of temperature on the rate of fertilizers’nutrient release was discussed. Results indicated that merely labeling single element released period was illogical. Results were evaluated comprehensively, and the key of the control of fertilizers’nutrient release was selecting proper coating substance.