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Zn在不同品种小麦植株地上部的积累和分配研究

DOI: 10.7668/hbnxb.2010.05.038, PP. 187-192

Keywords: Zn,小麦,含量,积累,分配

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Abstract:

Zn是植物正常生长发育所必需的微量元素之一,与小麦籽粒品质和人类饮食健康密切相关.鉴此,以长584、济麦20和中普绿麦1号3个小麦品种为试验材料,分析了常规大田种植条件下小麦植株地上部Zn的积累、分配规律.结果表明:小麦植株地上部各器官Zn含量均在器官形成初期表现最高,随生育期的推进,器官Zn含量呈下降趋势,植株地上部Zn积累量呈上升趋势,其中三叶+起身期增长缓慢,起身+灌浆初期增长迅速,灌浆初+灌浆末期增长趋于缓慢,平均日积累量峰值出现在拔节+抽穗期.灌浆末期,植株地上部单茎Zn积累量平均为142μg,籽粒中Zn的含量及分配比例均最高,茎秆对籽粒Zn贡献率最大.供试的3个品种中,长584植株在后期吸收Zn的能力较强,其植株Zn积累量、籽粒Zn积累量均最高;济麦20籽粒Zn的收获指数最高.

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