| 金沙江干热河谷主要造林树种干季光合与蒸腾作用区域效应分析 |
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| 引用本文： | 段爱国,张建国,何彩云,刘娟娟,曾艳飞,崔永忠,张春华.金沙江干热河谷主要造林树种干季光合与蒸腾作用区域效应分析[J].干旱区资源与环境,2013(7):148-154. |
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| 作者姓名： | 段爱国 张建国 何彩云 刘娟娟 曾艳飞 崔永忠 张春华 |
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| 作者单位： | 中国林业科学研究院林业研究所国家林业局林木培育重点实验室;中国林业科学研究院资源昆虫研究所 |
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| 基金项目： | 林业公益性行业科研专项“干热河谷困难立地区造林关键技术研究(201104002-3)”;国家林业局林业重点工程科技支撑项目“西南困难立地抗逆性优良乔灌木树种选择及快繁技术试验示范”资助 |
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| 摘 要： | 植物光合与水分生理特征是植物逆境适应能力评价的重要参考指标。文中研究探讨了金沙江干热河谷8个主要造林树种光合与蒸腾作用在河谷上段鹤庆县和中段元谋县的空间差异及干季转向干热季时的时序差异。结果表明:河谷上段与中段的地理变化对供试树种的净光合速率(Pn)、蒸腾速率(Tr)及水分利用效率(WUE)具有明显影响,但树种不同,影响程度具有明显区别;随河谷上段及中段的地理变化,供试树种Pn在3月干季发生的升降变化与5月干热季一致,具有一定的季节稳定性。在由3月干季转向5月干热季过程中,随着干热胁迫的持续与加深,绝大部分供试树种Pn、Tr在河谷上段与中段间的差异愈趋显著。
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| 关 键 词： | 干热河谷 植被恢复 气体交换参数 净光合速率 蒸腾速率 时空差异 |
Regional effect of photosynthesis and transpiration of the main tree species for vegetation restoration in dry season of the dry-hot river valleys |
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| DUAN Aiguo,ZHANG Jianguo,HE Caiyun,LIU Juanjuan,ZE Yanfei,CUI Yongzhong,ZHANG Chunhua.Regional effect of photosynthesis and transpiration of the main tree species for vegetation restoration in dry season of the dry-hot river valleys[J].Journal of Arid Land Resources and Environment,2013(7):148-154. |
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| Authors: | DUAN Aiguo ZHANG Jianguo HE Caiyun LIU Juanjuan ZE Yanfei CUI Yongzhong ZHANG Chunhua |
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| Institution: | 1.Research Institute of Forestry,CAF;Key Laboratory of Tree Breeding and Cultivation,State Forestry Administration,Beijing 100091,P.R.China;2.Research Institute of Resource Insects,CAF,Kunming 650224,P.R.China) |
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| Abstract: | Plant photosynthesis and transpiration are important reference indices for evaluating the adaptable ability in adversity.Regional effect of photosynthesis and transpiration of eight main tree species for vegetation restoration in dry season of the dry-hot river valleys was analyzed.The results showed that the altitude variety of trial regions had obvious effec on net photosynthetic rate(Pn),transpiration rate(Tr) and water using efficiency(WUE),but the effect extents had obvious difference for different tree species.The increase or decrease trendencies of Pn with altitude variety of trial regions for eight tree species were seasonally stable for dry March and dry-hot May.During the season changing from dry season in March to dry-hot season in May,the difference of Pn between high altitude region and low altitude region for the most tree species got to be significant,and Tr had the same variation law. |
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| Keywords: | dry-hot river valley vegetation restoration gas exchange parameters net photosynthetic rate transpiration rate temporal and spatial difference |
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