一次基施水稻控释肥技术的养分利用率及增产效果

通过盆栽试验、田间小区试验和生产大面积应用示范研究了一次基施水稻控释肥的养分利用率及其增产效果.结果表明，一次基施水稻控释肥技术与等养分量的专用肥处理比较，盆栽试验相对提高氮素利用率12.2%～22.7%，磷素利用率7.0%～35.0%；小区试验相对提高氮素利用率17.1%.综合广东不同水稻生态类型稻作区连续3年共167点(次)应用示范结果，表明一次基施水稻控释肥技术较常规分次施肥平均减少氮和磷养分用量分别为22.11%和21.81%，降低了施肥成本，获得8.2%的增产效果.

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 succes- sively 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.