不同磷钾用量对杂交水稻渝香203干物质生产和产量的影响  

Effects of Different Fertilization Rates of P and K on Dry Matter Production and Grain Yield of Hybrid Rice Yuxiang 203

作　　者：贾现文[1,2] 马均[1] 石勇 许远明 熊洪[4] 

机构地区：[1]四川农业大学水稻研究所,四川温江611130 [2]眉山市农业技术推广站,四川眉山620010 [3]眉山市东坡区农业技术推广站,四川眉山620032 [4]四川省农业科学院水稻高粱研究所,四川泸州646000

出　　处：《杂交水稻》2013年第3期64-67,共4页Hybrid Rice

基　　金：国家粮食丰产科技工程项目(2011BAD16B05);农业部水稻产业技术体系(西南地区)资助

摘　　要：研究了不同的磷钾肥用量处理对优质杂交稻渝香203干物质积累转运以及产量的影响。结果表明:在施N量固定在150kg/hm2时,施P 75 kg/hm2、施K 45或90 kg/hm2的处理光合产物积累量大,物质生产能力较强,茎鞘物质转换率较高,转运量多,产量高;施用P 75 kg/hm2、K 90 kg/hm2的处理产量最高,肥料贡献率和农学利用率较高,单位施肥量增加水稻产量的能力较强。在施N量固定在150 kg/hm2时,施P量大于75 kg/hm2或施K量大于90 kg/hm2不利于后期茎鞘物质的转运和产量的提高。The effects of different fertilization rates of P and K were studied on the dry matter accumulation and grain yield of quality hybrid rice Yuxiang 203. The results showed that, when the N rate was fixed at 150 kg/hm2, the treatments with the P205 rate at 75 kg/hm2 plus the K20 rate at 45 or 90 kg/hm2 had the highest accumulation of photosynthate, a stronger matter production capacity, a higher transformation percentage of the matter in stem and leaf sheath （TPMSS） and a higher export percentage of the matter in stem and leaf sheath （ EPMSS）, resulting in a higher grain yield. The treatment with the P205 rate at 75 kg/hm2 plus the K20 rate at 90 kg/hm2 had the highest grain yield and a higher fertilizer contribution rate （FCR） and agronomic efficiency （AE）, indicating a stronger yield increasing ability per unit fertilization. When the N rate was fixed at 150 kg/hm2, the treatments with the P2 05 rate more than 75 kg/hm2 or the K2 0 rate more than 90 kg/hm2 were not favorable to the transportation of the matter in stem and leaf sheath in late stage and resulted in a decrease in grain yield.

关 键 词：杂交水稻 磷钾肥用量 干物质积累与转运 产量 

分 类 号：S511.062[农业科学—作物学] S143