| 六种木本植物木质部栓塞化生理生态效应的研究 |
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| 引用本文： | 张硕新,申卫军,张远迎.六种木本植物木质部栓塞化生理生态效应的研究[J].生态学报,2000,20(5):788-794. |
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| 作者姓名： | 张硕新 申卫军 张远迎 |
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| 作者单位： | 1. 西北林学院资源学院,陕西杨陵,712100
2. 中国科学院华南植物研究所,广州,510650 |
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| 基金项目： | 国家自然科学基金!青年基金 ( 3 94 0 0 1 0 3 )，国家教委回国留学人员资助项目 |
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| 摘 要： | 对６个树种１年生枝木质部栓塞及水势进行了１４个月的连续观测。测定结果表明，木质部栓塞化直接引起木质部导水率下降，从而对树木生长发育节律造成影响。对导水率的影响可通过脆弱曲线看出，６种落叶阔叶树的２类脆弱曲线模型建立：ｙ＝ａｅｂ／ｘ和ｙ＝ｘ＾２／（ａ＋ｂｘ＾２）。通过模型求解，探讨和确定了参数ａ、ｂ的生理生态学意义，并据此比较不同树种木质部栓塞脆弱性的大小，结果为沙棘＞刺槐≥白榆＞加杨＞榛木＞元宝枫
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| 关 键 词： | 木质部栓塞化 生理生态效应 脆弱曲线模型 |
| 收稿时间： | 1999/6/18 0:00:00 |
| 修稿时间： | 2000/1/20 0:00:00 |
Ecophysiological effect of xylem embolism in six tree species |
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| ZHANG Shuoxin,SHEN Weijun and ZHANG Yuanying.Ecophysiological effect of xylem embolism in six tree species[J].Acta Ecologica Sinica,2000,20(5):788-794. |
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| Authors: | ZHANG Shuoxin SHEN Weijun and ZHANG Yuanying |
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| Institution: | Faculty of Resources; Northwest Forestry University; Yangling; Shaanxi; China |
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| Abstract: | Xylem embolism and water potential of six tree species was measured for fourteen months.The results showed that xylem embolism could directly cause the loss of xylem hydraulic conductivity.The influence of xylem embolism could be expressed by vulnerability curves.Two types of vulnerability curve models for the six deciduous broad leaved tree species were established,through which the theoretical value of parameters could be determined and their physiological meanings were also discussed.Analysis showed tha... |
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| Keywords: | xyle embolism ecophysiological effect vulnerability curve models |
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