以18个杂交中稻组合为材料,在施氮与不施氮条件下,研究了施氮对杂交中稻氮、磷、钾及干物质积累与分配的影响。结果表明,肥料稻谷生产效率表现为磷素(292.47～328.04 g grain/g P)>钾素(95.39～107.12 g grain/g K)>氮素(57.35～7...以18个杂交中稻组合为材料,在施氮与不施氮条件下,研究了施氮对杂交中稻氮、磷、钾及干物质积累与分配的影响。结果表明,肥料稻谷生产效率表现为磷素(292.47～328.04 g grain/g P)>钾素(95.39～107.12 g grain/g K)>氮素(57.35～70.35 g grain/g N),氮、磷、钾素的稻谷生产效率与籽粒收割指数间呈极显著正相关;施氮后植株的氮、磷、钾和干物质积累量均随之增加,且磷的增加量高于钾,但增加量均以分配到茎鞘和叶片为主。施氮植株比不施氮植株内氮、磷、钾积累量提高是生物产量和氮、磷、钾含量共同作用的结果,而且因氮、磷、钾含量提高的作用(66.30%～80.16%)大于生物量增加的作用(19.84%～33.70%)。植株氮、磷、钾含量分别与其稻谷生产效率呈极显著负相关,18个杂交中稻组合地上部植株氮、磷、钾的积累量比为1∶0.20～0.21∶0.61～0.66,其中73%～80%的氮和磷被籽粒吸收,73%～75%钾分配到茎叶。展开更多
[Objective] The aim was to research relationship between SPAD decline index after full-heading stage （SDIFHS） and productivity of rice. fertilized with nitro- gen in order to provide theoretical and practical refere...[Objective] The aim was to research relationship between SPAD decline index after full-heading stage （SDIFHS） and productivity of rice. fertilized with nitro- gen in order to provide theoretical and practical references for selection and breed- ing of rice varieties. [Method] From 2008 to 2010, 18 mid-season hybrid rice vari- eties were researched every year to explore relationship＇ between SDIFHS and pro- ductivity of rice fertilized with nitrogen. [Result] The productivity of rice fertilized with nitrogen was of extremely significant positive corretation with SDIFHS, because the higher SPAD decline index is, the higher LAI decline index and the transformation ratio of dry matter to spikes in overground plant would be. [Conclusion] The re- search established a new method to predict productivity of rice fertilized with nitro- gen based on SPAD decline index.展开更多
文摘以18个杂交中稻组合为材料,在施氮与不施氮条件下,研究了施氮对杂交中稻氮、磷、钾及干物质积累与分配的影响。结果表明,肥料稻谷生产效率表现为磷素(292.47～328.04 g grain/g P)>钾素(95.39～107.12 g grain/g K)>氮素(57.35～70.35 g grain/g N),氮、磷、钾素的稻谷生产效率与籽粒收割指数间呈极显著正相关;施氮后植株的氮、磷、钾和干物质积累量均随之增加,且磷的增加量高于钾,但增加量均以分配到茎鞘和叶片为主。施氮植株比不施氮植株内氮、磷、钾积累量提高是生物产量和氮、磷、钾含量共同作用的结果,而且因氮、磷、钾含量提高的作用(66.30%～80.16%)大于生物量增加的作用(19.84%～33.70%)。植株氮、磷、钾含量分别与其稻谷生产效率呈极显著负相关,18个杂交中稻组合地上部植株氮、磷、钾的积累量比为1∶0.20～0.21∶0.61～0.66,其中73%～80%的氮和磷被籽粒吸收,73%～75%钾分配到茎叶。
基金Supported by Southuest China Rice Innovation System and Crop High-yielding Project by Science and Technology (2011BAD02A05) Transformation Project of Agricultural Fruits into Capitals (2006GB2F000256)+2 种基金Sichuan Academic Leaders Training FundSichuan Rice Cultivation Key ProjectSichuan Financial Distribution Project~~
文摘[Objective] The aim was to research relationship between SPAD decline index after full-heading stage （SDIFHS） and productivity of rice. fertilized with nitro- gen in order to provide theoretical and practical references for selection and breed- ing of rice varieties. [Method] From 2008 to 2010, 18 mid-season hybrid rice vari- eties were researched every year to explore relationship＇ between SDIFHS and pro- ductivity of rice fertilized with nitrogen. [Result] The productivity of rice fertilized with nitrogen was of extremely significant positive corretation with SDIFHS, because the higher SPAD decline index is, the higher LAI decline index and the transformation ratio of dry matter to spikes in overground plant would be. [Conclusion] The re- search established a new method to predict productivity of rice fertilized with nitro- gen based on SPAD decline index.
