模拟增温对川西亚高山林线交错带绵穗柳生长、叶物候和叶性状的影响

应用生态学报

模拟增温对川西亚高山林线交错带绵穗柳生长、叶物候和叶性状的影响

徐振锋¹;胡庭兴¹;张力¹;张远彬²;鲜骏仁¹;王开运^2,3

¹四川农业大学林学园艺学院, 四川雅安 625014; ²中国科学院成都生物研究所, 成都 610041; ³华东师范大学上海市城市化生态过程和生态恢复重点实验室,上海 200062

收稿日期:2008-04-07 修回日期:1900-01-01 出版日期:2009-01-20 发布日期:2009-01-20

Effects of simulated warming on the growth, leaf phenology, and leaf traits of Salix eriostachya in sub-alpine timberline ecotone of Western Sichuan, China.

XU Zhen-feng¹;HU Ting-xing¹;ZHANG Li¹;ZHANG Yuan-bin²;XIAN Jun-ren¹;WANG Kai-yun^2,3

¹College of Forestry and Horticulture, Sichuan Agricultural University, Ya’an 625014, Sichuan, China; ²Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; ³Shanghai Key Laboratory of Urbanization Processes and Ecological Restoration, East China Normal University, Shanghai 200062, China

Received:2008-04-07 Revised:1900-01-01 Online:2009-01-20 Published:2009-01-20

摘要/Abstract

摘要： 采用开顶式生长室(open-top chamber, OTC)模拟增温的方法,研究了模拟增温对川西亚高山林线交错带绵穗柳生长和叶性状的影响.结果表明：与对照样地相比,OTC内日平均气温(地上12 m)在植物生长季中增加2.9 ℃,而5 cm土壤温度仅增加0.4 ℃；温度升高使绵穗柳芽开放时间明显提前、落叶时间明显推迟,叶寿命延长；OTC内绵穗柳叶面积和侧枝生长速率明显加快,比叶面积明显增加,而叶氮浓度却显著下降；OTC内绵穗柳的气孔导度、净光合速率、光呼吸速率和暗呼吸速率总体上呈增加趋势.综上所述,绵穗柳适应增温效应的能力较强,在未来气候变化背景下,其分布的海拔高度有可能上升.

关键词: 冬凌草甲素, 磷脂酶Dα1, 化感作用, 硫化氢

Abstract: By using open-top chamber (OTC), the effects of simulated warming on the growth , leaf phenology, and leaf traits of Salix eriostachya in sub-alpine timber line ecotone of Western Sichuan were studied. The results showed that comparing with the control, the mean air temperature at 12 m above the ground through out S. eriostachya growth season in OTC increased by 29 ℃, while the soil temperature at the depth of 5 cm only increased by 04 ℃. The temperature inc rease in OTC made S. eriostachya budding advanced and defoliation postpon ed obviously, and the leaf life-span longer. The leaf and branch growth rates a s well as the specific leaf area in OTC increased obviously, whereas the leaf ni trogen concentration decreased significantly. In OTC, the stomata conductance, n et photosynthetic rate, photorespiration, and dark respiration rate of S. erio stachya all exhibited an increasing trend. It was suggested that S. eriostac hya had stronger capability to adapt to warming, and, under the background of future global climate change, the elevation of S. eriostachya distribution i n the timberline ecotone would be likely to ascend.

Key words: allelopathy, oridonin, hydrogen sulfide, phospholipase Dα1

徐振锋¹;胡庭兴¹;张力¹;张远彬²;鲜骏仁¹;王开运^2,3. 模拟增温对川西亚高山林线交错带绵穗柳生长、叶物候和叶性状的影响[J]. 应用生态学报.

XU Zhen-feng¹;HU Ting-xing¹;ZHANG Li¹;ZHANG Yuan-bin²;XIAN Jun-ren¹;WANG Kai-yun^2,3. Effects of simulated warming on the growth, leaf phenology, and leaf traits of Salix eriostachya in sub-alpine timberline ecotone of Western Sichuan, China.[J]. Chinese Journal of Applied Ecology.

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