Effects of SPAD Decline Value of Mid-season Hybrid Rice Leaves after Full-heading Stage on Productivity of Rice Fertilized with Nitrogen  

杂交中稻齐穗后叶片 SPAD值衰减对氮素稻谷生产效率的影响(英文)

作　　者：徐富贤[1] 何希德[2] 熊洪[1] 张林[1] 郭晓艺[1] 朱永川[1] 周兴兵[1] 刘茂[1] 

机构地区：[1]四川省农业科学院水稻高粱研究所,四川泸州646000 [2]四川省农业科学院,四川成都610066

出　　处：《Agricultural Science & Technology》2013年第1期149-154,共6页农业科学与技术（英文版）

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);Sichuan Academic Leaders Training Fund;Sichuan Rice Cultivation Key Project;Sichuan Financial Distribution Project~~

摘　　要：[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.[目的]研究水稻齐穗后叶片SPAD值衰减与氮素稻谷生产效率的关系，以期为杂交水稻氮肥高效利用的品种选育提供理论与实践依据。[方法]2008～2010年，每年以18个杂交中稻品种为材料，研究齐穗后叶片SPAD值衰减与氮素稻谷生产效率的关系。[结果]氮素稻谷生产效率与齐穗期至成熟期的植株叶片SPAD值衰减指数呈极显著正相关关系，其原因在于：SPAD值衰减指数越大，IAI衰减指数也越多，地上部干物质向穗部运转比例越高，以至氮素稻谷生产效率与收获指数呈极显著正相关。[结论]该研究建立了利用SPAD值衰减指数预测氮素稻谷生产效率的新方法。

关 键 词：Mid-season hybrid rice Decline index of SPAD value Productivity of rice fertilized with nitrogen 

分 类 号：S511.32[农业科学—作物学]