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植物研究  2014 

两种主要油用牡丹光合特性及其微环境影响因子分析

DOI: 10.7525/j.issn.1673-5102.2014.06.009, PP. 770-775

Keywords: 凤丹,紫斑牡丹,光合特性,微环境

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Abstract:

?研究凤丹(Paeoniaostii)和紫斑牡丹(Paeoniarockii)的光合特性及其微环境限制因素对于油用牡丹的栽培推广具有重要的意义,本文分别选取凤丹和紫斑牡丹的原始集中产区安徽铜陵和甘肃兰州,对其光合特性及其微环境因子进行测定,分析其光合作用的限制因子。结果表明:在安徽铜陵凤凰山高温干旱期,叶片温度是其光合作用的最主要限制因素,叶片温度达到31℃时,叶片呼吸速率受到抑制;温度达到32℃时,气孔导度和光合速率被逆转,温度达到33℃,出现生理性损伤。在甘肃兰州,空气相对湿度影响是紫斑牡丹光合作用特性的最主要影响因素,其决定光饱和点发育、气孔导度、蒸腾速率和水分利用效率。适当遮荫的林缘生境和林窗生境是凤丹和紫斑牡丹生长的最适宜环境。

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