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| 木荷等6种阔叶树种光合生理特性比较 | |
| 引用本文： | 张卫强.木荷等6种阔叶树种光合生理特性比较[J].广东林业科技,2010,26(4):12-17. |
| 作者姓名： | 张卫强 |
| 作者单位： | 1. 云勇林场,广东佛山,528500 2. 广东省林业科学研究院 3. 龙川县林业科学研究所 |
| 基金项目： | 国家“十一五”科技支撑计划专题“粤港澳城市群水源涵养林构建技术试验示范（2006BAD03A1805）”;广东省科技计划项目“东江流域高效净水型水源林优化与配置技术研究与示范”（2009B020303006）;广东省林业科技计划项目“广东省森林生态效益监测与定位研究”（2008-08）。 |
| 摘 要： | 在东江中上游,对6年生木荷、红锥、火力楠、藜蒴、灰木莲和枫香的净光合速率（Pn）、蒸腾速率（Tr）、水分利用效率（WUE）等生理生态指标开展观测研究,结果表明：8月,6种树种均表现较强的生活力,保持了较高的净光合速率与蒸腾速率;10月,6树种均通过降低光合、蒸腾和提高水分利用效率来适应逆境。8月平均Pn和Tr要比10月均值分别高71.86%和129.22%,10月WUE却要比8月均值高25.78%。6树种Pn、WUE的平均值高低排序,均表现为木荷〉红锥、藜蒴和火力楠〉枫香和灰木莲,说明木荷有较强的环境适应能力和抗旱能力,其次为红锥、火力楠和藜蒴,而灰木莲和枫香较低。 |
| 关 键 词： | 净光合速率 水分利用效率 阔叶树种 东江中上游 |
| 收稿时间： | 2010/7/20 0:00:00 |
| 修稿时间： | 8/5/2010 12:00:00 AM |
Comparison of photosynthetic and physiological Characteristics in six broad-leaved tree species |
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| zhangweiqaing.Comparison of photosynthetic and physiological Characteristics in six broad-leaved tree species[J].Forestry Science and Technology of Guangdong Province,2010,26(4):12-17. | |
| Authors: | zhangweiqaing |
| Institution: | Chen Weiguang Zhang Weiqiang Li Zhaoqing Zeng LinghaiZhou Ping Zhou Yi Chen Guangsheng(1.Forestry of Yunyong,Foshan,528500;2.Guangdong Academy of Forestry;3.Longchuan Forestry Research Institute) |
| Abstract: | The photosynthesis rate（Pn）,transpiration rate（Tr）,and water use efficiency（WUE） of six-years-old Schima superba,Castanopsis hystrix,Michelia macclurel,Castanopsis sfissa,Manglietia glauca and Liquidambar formosana were measured by Li-6400 portable photosynthesis system manufactured by LI-COR company in the upper and middle reaches of Dongjiang watershed.The results showed that all six tree species performed well and maintained higher Pn and Tr under better hydrothermal conditions,when hydrothermal conditions were becoming worse,six tree species were able to adapte by reducing transpiration and increasing water use efficiency.There were large seasonal differences for these parameters,with higher net photosynthesis rate,and transpiration rate higher in August than in October（71.86% and 129.22% respectively）,while WUE higher in October than in August（25.78%）.According to the value of mean net photosynthetic rates,mean water use efficiency,in both August and October,the order of the six tree species was Schima superbaCastanopsis hystrix,Castanopsis fissa,Michelia macclurei Liquidambar formosana and Manglietia glauca.Schima superba has higher adaptive capacity to dry environment,followed by Castanopsis hystrix,Michelia macclurei and Castanopsis fissa,and Liquidambar formosana and Manglietia glauc has lowest adaptivity. |
| Keywords: | photosynthesis rate transpiration rate water use efficiency broad-leaved tree species the upper and middle reaches of Dongjiang watershed |
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