[Objective] To clear effects of phosphorus,silicon and their interaction on yield and chlorophyll content of different indica hybrid rice varieties based on nitrogen fertilizer.[Method] We studied effects of phosphorus,silicon and their interaction on yield and chlorophyll content of different indica hybrid rice varieties like Shanyou 63,Fcngliangyou 1,ⅡYou 838,Fengliangyou 4,Y liangyou 2 and ⅡYou 52.[Result] Silicon ap plication could significantly increase the spikelets per panicle,filled grains per panicle and 1 000-grain weight,while phosphorus application could significantly increase the spikelets per panicle,filled grains per panicle and effective ears.Comparing with control group,phosphorus and silicon combined application could increase the yield of rice,and the increasing ranges of yield from Y liangyou 2 and ⅡYou 52 were the most,with 10.06％ and 10.90％ respectively.The chlorophyll content of rice leaves under phosphorus and silicon combined application was obviously higher than that of phosphorus application or silicon application.[Conclusion] The results provide theoretical basis for the fertilization of high yield and good quality rice.%[目的]明确在氮肥基础上磷、硅及互作对水稻产量和叶绿素含量的影响.[方法]以籼型杂交水稻品种汕优63、丰两优1号、Ⅱ优838、丰两优4号、Y两优2号和Ⅱ优52为试验材料,研究磷、硅及互作对水稻产量及叶绿素含量的影响.[结果]施硅可明显增加每穗总粒、每穗实粒和千粒重,施磷可明显增加每穗总粒、每穗实粒和有效穗.与对照相比,磷硅互作可提高水稻产量,Y两优2号和Ⅱ优52这2个品种的产量增幅最大,分别达10.06％和10.90％.水稻叶片叶绿素含量在磷硅互作处理下明显高于单施磷肥或单施硅肥.[结论]试验结果为优质高产水稻的施肥提供了理论依据.
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