| 利用液流法估算樟子松和小叶锦鸡儿人工林蒸腾耗水 |
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| 引用本文： | 牛丽,岳广阳,赵哈林,张铜会,赵学勇,刘新平,赵玮.利用液流法估算樟子松和小叶锦鸡儿人工林蒸腾耗水[J].北京林业大学学报,2008,30(6):1-8. |
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| 作者姓名： | 牛丽 岳广阳 赵哈林 张铜会 赵学勇 刘新平 赵玮 |
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| 作者单位： | 1 中国科学院寒区旱区环境与工程研究所2 中国科学院研究生院 |
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| 基金项目： | 国家自然科学基金项目，中国科学院知识创新方向性项目 |
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| 摘 要： | 利用Dynamax茎流测量系统，于2006年对科尔沁沙地一处20年生樟子松和小叶锦鸡儿人工混交林的液流动态进行监测。在液流测定的基础上，分别选择边材面积和叶面积为纯量进行尺度扩展来推算樟子松和小叶锦鸡儿林分蒸腾耗水量，分析林分蒸腾耗水量与沙地水分动态关系。结果表明:植物蒸腾耗水量的大小与太阳有效辐射和水蒸气压亏缺显著相关； 在土壤水分严重匮缺的月份，樟子松日蒸腾耗水量呈现明显的下降趋势，变化范围为0.21～1.17 mm/d，平均0.81 mm/d； 小叶锦鸡儿在低土壤含水量条件下对水分利用能力较强，表现出良好的耐旱性和稳定性，其蒸腾耗水的变化范围为0.51～2.79 mm/d，平均1.98 mm/d； 8月份樟子松和小叶锦鸡儿蒸腾耗水量为86.5 mm，是同期降水的137.7%，水分条件是限制人工林存活状况的最主要因素。
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| 关 键 词： | 樟子松 小叶锦鸡儿 液流测定 林分蒸腾 尺度扩展 |
| 收稿时间： | 1900-01-01 |
Evaluating transpiration from Pinus sylvestris var. mongolica and Caragana microphylla using sap flow method |
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| NIU Li,YUE Guang-yang. Cold , Arid Regions Environment , Engineering Research Institute,Chinese Academy of Sciences,Lanzhou,P.R.China, Graduate University of Chinese Academy of Sciences,Beijing,P.R.China..Evaluating transpiration from Pinus sylvestris var. mongolica and Caragana microphylla using sap flow method[J].Journal of Beijing Forestry University,2008,30(6):1-8. |
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| Authors: | NIU Li YUE Guang-yang Cold Arid Regions Environment Engineering Research Institute Chinese Academy of Sciences Lanzhou PRChina Graduate University of Chinese Academy of Sciences Beijing PRChina |
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| Institution: | 1 Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, P.R. China; 2 Graduate University of Chinese Academy of Sciences, Beijing, 100049, P.R. China. |
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| Abstract: | Sap flow rates were determined using sap flow methods in August,2006 from a 20-year-old mixed plantation of Pinus sylvestris var.mongolica and Caragana microphylla at a sandy site located in the Horqin Region of northeastern China.Sap flow rates were then used to estimate transpiration of individual trees based on their sapwood areas and leaf areas.Furthermore, the relationship between water use and soil moisture dynamics was also analyzed.The results showed that variations in transpirations of both tree sp... |
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| Keywords: | Pinus sylvestris var mongolica Caragana microphylla sap flow measurement stand transpiration scaling-up |
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