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昆仑山北坡4种优势灌木的气体交换特征
引用本文:朱军涛,李向义,张希明,林丽莎,杨尚功.昆仑山北坡4种优势灌木的气体交换特征[J].生态学报,2011,31(12):3522-3530.
作者姓名:朱军涛  李向义  张希明  林丽莎  杨尚功
作者单位:中国科学院新疆生态与地理研究所,乌鲁木齐,830011;荒漠与绿洲生态国家重点实验室,乌鲁木齐,830011;中国科学院策勒荒漠草地生态系统国家野外科学观测研究站,策勒,848300
基金项目:新疆维吾尔自治区科技计划项目(200933125);国家科技支撑项目(2009BAC54B03-1);国家重点基础研究发展计划资助(2009CB421303);中科院知识创新工程重要方向项目(KZCX2-YW- 431)。
摘    要:在自然条件下对昆仑山北坡四种灌木塔里木沙拐枣(Calligonum roborowasikii)、驼绒藜(Ceratoides latens)、合头草(Sympegma regelii)和昆仑绢蒿(Seriphidium korovinii)的气体交换、水势的季节变化特征及生长季末δ13C值进行了比较研究。结果表明:驼绒藜、塔里木沙拐枣和合头草气体交换日变化为单峰曲线,昆仑绢蒿为双峰曲线;其中塔里木沙拐枣属高光合高蒸腾型,水分利用效率最高,合头草属低光合低蒸腾型,驼绒藜属高光合低蒸腾型,昆仑绢蒿属低光合高蒸腾,水分利用效率最低。驼绒藜光合速率8月日变化,10:00-12:00,16:00-20:00两个时段,Pn下降,主要决定因素均为非气孔因素。沙拐枣6月光合速率日变化,12:00-14:00时,Pn下降,主要受气孔导度因素影响;16:00-20:00时,Pn下降,可能是同时受气孔和非气孔因素的影响。从耐旱机理可以将4种灌木归类:塔里木沙拐枣和昆仑绢蒿属于高水势延迟脱水耐旱机理;驼绒藜和合头草属于低水势忍耐脱水机理。用δ13C表征植物水分利用效率时,只有部分物种有很好的一致性。

关 键 词:灌木  气体交换参数  水势  δ13C  昆仑山
收稿时间:4/27/2010 4:23:34 AM
修稿时间:2010/7/15 0:00:00

The gas exchange characteristics of four shrubs on the northern slope of Kunlun Mountain
ZHU Juntao,LI Xiangyi,ZHANG Ximing,LIN Lisha and YANG Shanggong.The gas exchange characteristics of four shrubs on the northern slope of Kunlun Mountain[J].Acta Ecologica Sinica,2011,31(12):3522-3530.
Authors:ZHU Juntao  LI Xiangyi  ZHANG Ximing  LIN Lisha and YANG Shanggong
Institution:Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Urumqi 830011,China;State Key Laboratory of Desert and Oasis Ecology, Urumqi 830011, China;Cele National Station of Observation & Research For Desert-grass Land Ecosystem in Xinjiang,Cele 848300, China;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Urumqi 830011,China;State Key Laboratory of Desert and Oasis Ecology, Urumqi 830011, China;Cele National Station of Observation & Research For Desert-grass Land Ecosystem in Xinjiang,Cele 848300, China;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Urumqi 830011,China;State Key Laboratory of Desert and Oasis Ecology, Urumqi 830011, China;Cele National Station of Observation & Research For Desert-grass Land Ecosystem in Xinjiang,Cele 848300, China;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Urumqi 830011,China;State Key Laboratory of Desert and Oasis Ecology, Urumqi 830011, China;Cele National Station of Observation & Research For Desert-grass Land Ecosystem in Xinjiang,Cele 848300, China;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Urumqi 830011,China;State Key Laboratory of Desert and Oasis Ecology, Urumqi 830011, China;Cele National Station of Observation & Research For Desert-grass Land Ecosystem in Xinjiang,Cele 848300, China
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