[Nutrient use efficiency and yield-increasing effect of single basal application of rice specific controlled release fertilizer].

A series of pot and field experiments and field demonstrations showed that in comparing with the commonly used specific-fertilizers containing same amounts of nutrients,single basal application of rice-specific controlled release fertilizer could increase the use efficiency of N and P by 12.2%～22.7% and 7.0%～35.0%,respectively in pot experiment,and the use efficiency of N by 17.1% in field experiment.In 167 field demonstrations successively conducted for 3 years in various rice production areas of Guangdong Province,single basal application of the fertilizer saved the application rate of N and P by 22.1% and 21.8%,respectively,and increased the yield by 8.2%,compared with normal split fertilization.