【摘要】 以威优６号作对照，研究了威优４６和汕优桂９９的净光合强度、叶绿素含量、叶面积指数、粒叶比、根系活力、籽粒干物质积累规律、灌浆强度以及主穗和分蘖穗各枝梗结实率差异。结果表明：两个新组合表现出高产的生理基础。更多还原

【Abstract】 Wei-You 46 was used as check to study the net photosynthetic intensity, chlorophyl content, index of leaf area. grain--leaf ratio, rooting activity. regularity of dry matter accumulation in grains, filling intensity and seed set rate of main and tillered panicles of Wei-You 46 and Shan-You-Gui 99, The results showed that there exists physiological base of high yields for both new hybrid combinations.更多还原