作物学报 ›› 2014, Vol. 40 ›› Issue (05): 850-858.doi: 10.3724/SP.J.1006.2014.00850
褚光,刘洁,张耗,杨建昌*
CHU Guang,LIU Jie,ZHANG Hao,YANG Jian-Chang*
摘要:
2011年与2012年于水培池种植超级稻品种两优培九(两系杂交籼稻)和扬粳4038 (粳稻)及常规高产品种扬稻6号(籼稻)和扬辐粳8号(粳稻),观察各生育期根系形态生理特征及其与产量形成的关系。结果表明,与常规高产品种相比,超级稻品种具有强大的产量潜力,其高产潜力主要得益于较多的每穗颖花数与较大的总库容量(单位地面积颖花量)。超级稻品种在整个生育期较大的根量、生育早中期较高的单株根系氧化力、根系总吸收表面积与活跃吸收表面积及根系中较高的玉米素与玉米素核苷含量是其产量库容大和产量高的重要原因。超级稻存在着结实率较低的问题,这可能与其在灌浆期根系活性下降较快有关。提高超级稻灌浆期根系活性,是提高其结实率、促进其产量进一步提高的重要途径。
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