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夏玉米叶片δ13C与叶重、水分利用效率及产量的关系研究

DOI: 10.7668/hbnxb.2009.04.024, PP. 119-123

Keywords: 夏玉米,叶片&delta,13C,水分利用效率,产量

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Abstract:

采用LSD法对夏玉米两品种(郑单98和鲁单981)及各水分处理间植株叶片δ13C进行方差分析,并将其与叶重、水分利用效率及产量间关系进行了定性分析,以期为改进旱地和节水农业栽培及选育抗性品种提供参考价值.研究发现:鲁单981较郑单98长势快、株高高、抗倒伏性差,但前者的产量却高于后者;两品种间植株叶片δ13C值差别不明显;不同作物品种相同水分处理间因遗传因素的影响导致其δ13C值有所差异,相同品种不同水分处理间也因环境因素的影响致使其δ13C值有所不同;两品种间植株叶片δ13C值与产量均表现出一致的负相关趋势,但与叶重、水分利用效率却均呈现出相反的相关趋势.其中,在与叶重的相关性中,郑单98表现出正相关性,而鲁单981表现出负相关性;在与水分利用效率的相关性中,郑单98呈负相关趋势,而鲁单981则呈正相关趋势.

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