In order to investigate the effects of P fertilizer management on the yield and nitrogen,phosphorus and potassium uptake and utilization of double-cropping rice,Xiangzaoxian 45(early rice)and Taiyou 553(late rice)were used as materials to carry out the machine planting test under three phosphorus application levels(45 kg/ha,P45;75 kg/ha P75;105 kg/ha,P105)and two application periods(S1:full base fertilizer;S2:basal fertilizer∶ear fertilizer=2∶1).The results showed that the increase of P application rate could increase the dry matter accumulat...
