两系杂交早稻香两优139的净光合生产率及干物质在器官中的分配  

Net assimilation rate and dry matter allocation of a early-seasoned hybrid rice Xiangliangyou 139

作　　者：邓定武[1] 蔡立湘[1] 刘登中[2] 

机构地区：[1]湖南省农业科学院,湖南长沙410125 [2]怀化市农科所,湖南怀化418000

出　　处：《作物研究》2003年第1期7-9,12,共4页Crop Research

基　　金：湖南省科技厅资助(92-01-001)。

摘　　要：从净光合生产率、干物质生产、物质在各器官中的增减变化规律,来探索两系杂交早稻香两优139与常规稻湘早籼13号的异同,为制定栽培方案提供理论依据。试验表明,香两优139的生长优势主要表现在中期;净光合生产率及干物质生产能力大于常规稻;也同样存在"生长中心"自下而上的转移过程,以及后期生活力的下降阶段。认为"生长中心"的正常转移是实现两系杂交早稻高产的关键。The earlyseasoned hybrid indica rice Xiangliangyou 139 was compared with a earlyseasoned variety Xiangzaoxian 13 in net assimilation rate,dry matter accumulation and allocation in order to provide a foundation for working out the planting procedure.The results showed that Xiangliangyou 139 was supeior to Xiangzaoxian 13 at the middle stage of rice development,with greater net assimilation rate and dry matter accumulation.However,they both shifted the production center from the base to the apex of plants and decreased vigor at the final stage.It is proposed that normal shift of productive center should be the key to high yield of earlyseasoned hybrid rice.

关 键 词：两系杂交早稻 香两优139品种 净光合生产率 干物质 器官 分配 “生长中心” 转移 

分 类 号：S511.31[农业科学—作物学]