【摘要】 为研究磷肥后移及磷肥减量对水稻产量和磷肥利用率的影响,采用田间试验,通过对比分析配方施肥与磷肥后移及减量条件下水稻磷素吸收累积量、利用效率及产量的差异。结果表明:在相同的施磷水平下,与磷肥全部基施处理相比,磷肥后移30%处理(m_基肥∶m_穗肥=7∶3)使水稻成熟期磷素含量提高了4.3%,磷素总累积量和净累积量分别提高了12%和25.6%,磷肥贡献率、农学利用率、偏生产力和吸收利用率提高了27.7%、33.6%、8.2%和27.3%,水稻产量提高了8.2%;而磷肥减量30%后移30%处理和磷肥减量50%后移30%处理的水稻产量则分别减少了1.8%和6.5%,但皆差异性不显著（P>0.05）。配方施肥条件下,磷肥适当后移可增加水稻生育后期磷素含量、净吸收量和磷素累积量,提高水稻产量和磷肥利用效率;磷肥适当减量可维持水稻正常产量。更多还原

【Abstract】 To study the effect of phosphorus fertilizer postpone and reduction on phosphorus utilization efficiency of rice during the growth period,field experiments related to soil testing and phosphorus recommendation as well as phosphorus fertilizer postpone and reduction during rice growth period were carried out to analyze the rice yield,phosphorus accumulation and phosphorus use efficiency.Results showed that under the same phosphorus level,compared with the soil testing and P fertilizer recommendation treatments(P used as basal fertilizer),the P concentration as well as the amounts of total and net phosphorus accumulation in rice during the later growth period in T3(basal P∶top dressed P=7∶3)were 4.3%、12% and 25.6%higher than those in T2(P used as basal fertilizer).Meanwhile,the contribution rate,agronomic use efficiency,partial fertilizer productivity and absorption efficiency of phosphorus in treatments of phosphorus fertilizer postpone 30% were increased by 27.7%、33.6%、8.2% and 27.3%,and the rice yield increased by 8.2% than that in T2(P used as basal fertilizer),respectively.The rice yields in P fertilizer recommendation treatments(T2,P used as basal fertilizer),were 1.8% and 6.5%higher than that in reduction30% plus postpone 30% of phosphorus fertilizer and the treatments of reduction 50% plus postpone 30% of phosphorus fertilizer,but the difference was not significant(P>0.05).Results from this study indicated that reasonable amount of phosphorus fertilizer postpone increased phosphorus uptake and accumulation,P utilization efficiency and rice yieldduring the growth period;and reasonable amount of phosphorus fertilizer reduction maintained normal production of rice.更多还原