| 摘要: |
| 以‘贝尔奇卡金 Belgica Aurea’、‘金皇帝 Gold King’、‘牢苏尼阿纳 Lawsoniana’3 个哈克勒雷冬青 Ilex × altaclerensis 品种 13 a 生嫁接植株成熟叶片为试材，采用 LI-6400 光合仪测定其净光合速率（Pn）、蒸腾速率（Tr）、胞间 CO2 浓度（Ci）、气孔导度（Gs）等光合参数日变化，测定叶片相关生理指标，并进行相关性分析。结果表明：3 个哈克勒雷冬青品种的 Pn 受生理及环境因子不同程度的影响，影响 Pn 的主要生理因子是 Gs，环境因子为大气温度。3 个品种的 Pn 日变化均呈双峰曲线，“午休”现象，原因主要是非气孔因素；Pn、Tr、叶绿素含量和比叶重均表现为‘牢苏尼阿纳’＞‘贝尔奇卡金’＞‘金皇帝’。综上所述，‘牢苏尼阿纳’光合生产能力最高，能够快速生长；‘贝尔奇卡金’次之，且受环境影响最小；‘金皇帝’综合光合性能最弱。 |
| 关键词: 哈克勒雷冬青 光合速率 日变化 环境因子 |
| DOI： |
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| 基金项目:宁波市“科技创新 2025”重大专项（2019B10014） |
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| Comparison of the Diurnal Variation of Photosynthesis in Three Varieties of Ilex×altaclerensis |
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lubin1, ZHENG Yongqiang1, WEI Bin2, HONG Chuntao2, SHEN Dengfeng2, ZHANG Jianhong2, PAN Cunde1
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1.College of Forestry and Landscape Architecture，Xinjiang Agricultural University;2.Institute of Forestry，Ningbo Academy of Agricultural Sciences
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| Abstract: |
| Three varieties of Ilex×altaclerensis (‘Belgica Aurea’, ‘Gold King’, and ‘Lawsoniana’) were used as test materials, the diurnal variation photosynthetic parameters such as net photosynthetic rate(Pn), transpiration rate(Tr), intercellular CO2 concentration(Ci) and stomatal conductance(Gs) were measured by LI-6400 photosynthesizer, and the relevant physiological indexes of leaves were determined and correlation analysis was conducted. The results showed that the Pn of the three varieties was affected by physiological and environmental factors to different degrees. The main physiological factor affecting Pn was Gs, and the environmental factor was atmospheric temperature. The diurnal variation of Pn of the three varieties showed a bimodal curve and the “siesta” phenomenon, which was mainly caused by non-stomatal factors. Pn, Tr,chlorophyll content, and specific leaf weight were in the order of ‘Lawsoniana’ > ‘Belgica Aurea’ > ‘Gold King’. To sum up, ‘Lawsoniana’ has the highest photosynthetic production capacity and can grow rapidly. ‘Belgica Aurea’ comes in second and is least affected by the environment. The ‘Gold King’ had the weakest comprehensive photosynthetic performance. |
| Key words: Ilex×altaclerensis photosynthetic rate diurnal variation environmental factors |
