Abstract:Phosphorus utilization efficiency of 20 rice varieties was studied preliminarily under three level,i.e.,low(0 kg/hm2),medium(75 kg/hm2) and high(150 kg/hm2).The results showed that rice varieties were divided into four kinds: efficient phosphorus,inefficient phosphorus,sensitive phosphorus and middle types. ’Jijing 88’, ’Ji 03-2355’, and ’Jijing 78’were efficient phosphorous varieties. ’Shennong 6014’, ’Ji 06-44 ’and ’Ji 03-55 ’were inefficient phosphorous varieties. ’Ji 03-2843 ’and ’Ji 06-43 ’were sensitive phosphorous varieties.The rest were meddle types.Efficient phosphorous rice varieties had high yield of grain and biomass at three level of phosphorus,especially under high phosphorous condition.Inefficient phosphorous rice varieties were opposite.Sensitive phosphorous rice varieties had low yield of grain and biomass under low phosphorous condition,but they were increased greatly under medium phosphorus.Increasing phosphorus fertilizer properly can raise the yield,dry mater yield and the number of effect ears per unit area,it can also lower blighted rate obviously.