| 无刺构骨秋季光合特性的初步研究 |
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| 引用本文： | 尤扬,张晓云,王贤荣,孙东方.无刺构骨秋季光合特性的初步研究[J].资源开发与市场,2014(5):523-525. |
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| 作者姓名： | 尤扬 张晓云 王贤荣 孙东方 |
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| 作者单位： | 河南科技学院园艺园林学院;南京林业大学森林资源与环境学院; |
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| 基金项目： | 河南教育厅科学技术研究重点项目(编号:12B180008);河南教育厅科学技术研究重点项目(编号:13A180307) |
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| 摘 要： | 采用Li-6400光合测定系统对无刺构骨的秋季光合特性进行了初步研究.结果表明,无剌构骨净光合速率（Pn）日变化规律为双峰曲线形式,有“午睡”现象,最高峰值于11：00左右出现,次高峰出现在14：00,日最大净光合速率为8.33μmol/m2·s,净光合速率（Pn）与气孔导度（Cond）、蒸腾速率（Tr）呈正相关,与胞间CO2浓度（Ci）呈负相关.无刺枸骨光补偿点为12.146μmol/m2·s,光饱和点为1499μmoL/m2·s.
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| 关 键 词： | 无刺构骨 光和速率 气孔导度 蒸腾速率 光补偿点 |
Photosynthetic Characteristics of Ilex cornuta Lindl.var.fortunei S.Y.HU in Autumn |
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| Institution: | YOU Yang, ZHANG Xiao- yun , WANG Xian- rong, SUN Dong- fang(1. School of Horticulture Landscape Architecture, Henan Institute of Science and Technology, Xinxiang 453003, China; 2. College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China) |
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| Abstract: | The photosynthetic characteristics of llex cornuta Lind1. vat. fortunei S. Y. HU were studied with the use of Li - 6400 portable photo- synthesis assessment system. The results showed that the curve of diurnal variation of llex cornuta Lindl. var. fortunei S. Y. HU net photosynthetic rate was a bimodal curve and there was a clear depression at noon. The first peak occurred at 11 ： 00 am, the secondary maximum occurred at 14 ： 00 pm. The maximum diurnal net photosynthetic rate was 8.33ptmol/m2·s. The analysis also showed that there were a positive relationship between photosyn- thetic rate and transpiration rate and stomatal conductance, there was a negative relationship between photosynthetic rate and internal CO2 concentra- tion. Light compensation point was 12.146 μmol/m2·s, light saturation point were1499btmol/m2· s. |
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| Keywords: | llex cornuta Lindl var fortunei S Y HU stomatal conductance photosynthetic rate light compensation point transpiration rate |
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