强化栽培对杂交中稻籽粒充实度的影响及其与源库结构的关系  

Effect of the System of Rice Intensification on Grain Plumpness in A ssociation with Ratio of Source to Sink in Mid-Season Hybrid Rice

作　　者：徐富贤[1] 熊洪[1] 朱永川[1] 谢戎[1] 王贵雄[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

出　　处：《中国水稻科学》2004年第6期522-526,共5页Chinese Journal of Rice Science

基　　金：农业部农业结构调整重大技术研究专项(20030101B);四川省青年基金资助项目(03ZQ026070);四川省水稻攻关后补助资助项目;泸州市农业科技资助项目

摘　　要：以 18个杂交中稻组合为材料 ,分别进行强化栽培和传统栽培两组试验 ,研究了源库结构与强化栽培的籽粒充实度之间的关系。结果表明 ,强化栽培的籽粒充实度与组合的着粒数关系密切 ,不同组合强化栽培与传统栽培籽粒充实度的差值 (强化栽培 -传统栽培 )分别与强化栽培和传统栽培下各组合相应的着粒数呈极显著负相关。尽管在强化栽培条件下所有组合穗子变大使其叶粒比均有所下降 ,但中小穗型组合仍有足够的光合源保证籽粒的正常灌浆结实。与此相反 ,大穗型组合在强化栽培条件下因库的增大使源库矛盾进一步加剧 ,致使结实率、充实率和充实指数较传统栽培显著降低。在四川南部中稻区 ,传统栽培条件下的着粒数不超过 173粒的中小穗型组合可作为强化栽培选择品种的参考指标。The grain plumpness under two cultivated methods (t he system of rice intensification and traditional cultivation) was investigated using 18 mid-season hybrid rice combinations. There existed a highly signi ficant negative correlation between the difference of grain plumpness under th e two cultivated methods and spikelets per panicle. The small- or middle-pa nicle hybrid rice though they showed significant decrease in leaf-grain ratio under the system of rice intensification maintained normal grain fill ing due to plenty of source supply, while the big-panicle hybrid rice was on the contrary. It suggested that spikelets per panicle less than 173 under traditional cultivation, was a index for selecting variety in applying the sys tem of rice intensification in the southern region of Sichuan Province.

关 键 词：强化栽培 杂交中稻 籽粒充实度 源库结构 

分 类 号：S511.32[农业科学—作物学]