摘要： 以典型的北方粳型超级稻品种沈农265和沈农606为试材,秋光和辽粳294作为对照,采用盆栽方法,在不同生育时期对各个品种的根冠比、单位地上部分所具有的根长、根系总吸收面积、叶面积指数、干物质运转与分配进行研究。试验结果表明,生育前期对照品种秋光和辽粳294叶片伸展速度较快,后期叶片进行光合作用减少,出现早衰的现象;超级粳稻品种沈农265和沈农606生育前期根冠比大,生育后期有较高叶面积指数,根系发达,没有出现根系冗长,茎鞘物质输出率和茎鞘物质转换率中等,可以充分利用生育后期的光能资源进行光合作用,产生更多的干物质,为高产奠定了基础。

关键词: 粳型超级稻, 根系, 地上部分生物量

Abstract: The typical japonica super rice varieties, Shennong 265 and Shennong 606 were used to study materials, Akihikari and Liaojing294 as control varieties.The rate of dry weight between root and corona, the change of root length per area, leaf area index, root total absorption area and distribution and transportation of dry matter in different growth stages of different varieties were measured by potted experiment.The resulted showed leaf of Akihikari and Liaojing 294 had fast growth speed in early stages, decreased photosynthesis in later stages and showed premature aging.The typical japonica super rice varieties Shennong 265 and Shennong 606 had high ratio dry weight between root and corona.Their high leaf area index were observed and roots grew vigorous in later stages.The roots of Shennong 265 and Shennong 606 had not found verbosity.EPMSS and TPMSS showed medium so that Shennong 265 and Shennong 606 may take advantage of luminous energy to make photosynthesis and form more dry matter.It was based on high yelid of Shennong 265 and Shennong 606．

Key words: Japonica super rice, Roots, Acrial part biomass

中图分类号: 

• S511.03