| 降雨量对大针茅水分利用效率的影响 |
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| 作者姓名： | 刘艳杰 张立荣 牛海山 仲延凯 徐兴良 张翠芳 |
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| 作者单位： | 1. 中国科学院研究生院资源与环境学院, 北京 100049;
2. 内蒙古大学生命科学学院, 呼和浩特 010021;
3. 中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室, 北京 100101;
4. 北京欣国环环境技术发展有限公司, 北京 100044 |
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| 基金项目： | 国家自然科学基金(40871032)和中国科学院知识创新工程重要方向项目(KZCX2-EW-QN604)资助 |
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| 摘 要： | 借助1983-1993年间收集的历史样品,并通过移栽和浇水试验,研究纯粹的降水因子对大针茅水分利用效率的影响. 结果表明,无论是在时间尺度还是移栽实验中,降雨量对大针茅的水分利用效率影响显著. 并且仅仅降雨量的变化就能够造成人们在空间尺度上观察到的响应格局,这种格局是否受遗传因素的影响还需要进一步研究.
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| 关 键 词： | 大针茅 水分利用效率 稳定性碳同位素 |
| 收稿时间： | 2012-04-11 |
| 修稿时间： | 2012-04-24 |
Effects of precipitations on water use efficiency of Stipa grandis |
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| Authors: | LIU Yan-Jie ZHANG Li-Rong NIU Hai-Shan ZHONG Yan-Kai XU Xing-Liang ZHANG Cui-Fang |
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| Institution: | 1. College of Resources and Environment, Graduate University, Chinese Academy of Sciences, Beijing 100049, China;
2. College of Life Sciences, Inner Mongolia University, Hohhot 010021, China;
3. Key Laboratory and Ecosystem Network Observation and Modelling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
4. Beijing Xinguohuan Environmental Technology Development Co Ltd, Beijing 100044, China |
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| Abstract: | The pattern that water use efficiency (WUS) decreased with precipitation is shown in spatical scale and it may be affected by both the genetic and environmental factors. Samples of Stipa grandis, collected at the same site during a period from 1983 to 1993 and common garden experiments, were used to study the relationship between the precipitation and WUE. The results show that WUE strongly decreases with precipitation in both the two experiments and that only the change in precipitation causes this pattern. The genetic effect needs further investigation. |
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| Keywords: | Stipa grandis" target="_blank">Stipa grandis')">Stipa grandis water use efficiency stable carbon isotope |
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