| 不同天气条件下小叶锦鸡儿茎流及耗水特性 |
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| 引用本文： | 岳广阳,赵哈林,张铜会,云建英,牛丽,何玉惠. 不同天气条件下小叶锦鸡儿茎流及耗水特性[J]. 应用生态学报, 2007, 18(10): 2173-2178 |
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| 作者姓名： | 岳广阳 赵哈林 张铜会 云建英 牛丽 何玉惠 |
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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,兰州,730000;中国科学院研究生院,北京,100049
2. 中国科学院寒区旱区环境与工程研究所,兰州,730000 |
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| 基金项目： | 国家自然科学基金;中国科学院知识创新工程项目 |
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| 摘 要： | 采用以热平衡为原理的Dynamax包裹式茎流测量系统,于2006年对科尔沁沙地人工小叶锦鸡儿群落的液流变化进行连续监测,利用实验区自动气象站同步检测光合有效辐射、气温、相对湿度和风速等气象因子,结合人工记录的天气状况,分别选取4种最典型的天气条件,分析了小叶锦鸡儿的茎流变化、单枝耗水量及其与气象因子的关系.结果表明:在高温、强辐射条件下,小叶锦鸡儿的液流呈"几"字型宽峰曲线,以低耗水的蒸腾特性耐受干旱缺水的环境.不同天气条件下,小叶锦鸡儿液流日变化波动曲线及其主要影响因子各异,但光合有效辐射始终是液流变化的主导因子.小叶锦鸡儿茎干液流通量密度的变化是各种气象因子综合作用的结果.单枝日耗水量的总体变化趋势是从晴天、阴天、风天到雨天依次减少,其平均值分别为459、310、281和193mg.d-1.
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| 关 键 词： | 基因工程微生物 生态学 环境 |
| 文章编号： | 1001-9332（2007）10-2173-06 |
| 修稿时间： | 2006-12-28 |
Characteristics of Caragana microphylla sap flow and water consumption under different weather conditions on Horqin sandy land of northeast China |
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| YUE Guang-yang,ZHAO Ha-lin,ZHANG Tong-hui,YUN Jian-ying,NIU Li,HE Yu-hui. Characteristics of Caragana microphylla sap flow and water consumption under different weather conditions on Horqin sandy land of northeast China[J]. The journal of applied ecology, 2007, 18(10): 2173-2178 |
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| Authors: | YUE Guang-yang ZHAO Ha-lin ZHANG Tong-hui YUN Jian-ying NIU Li HE Yu-hui |
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| Affiliation: | 1 Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Employing heat balance Dynamax packaged sap flow measuring system and automatic weather recording system, the sap flow of artificial Caragana microphylla community on Horqin sandy land of northeast China was monitored consecutively in 2006, and the photosynthetically effective radiation, air temperature, relative humidity and wind velocity were measured synchronously. According to the manual records of weather conditions, four most representative weather conditions were gathered up to analyze the relationships of C. microphylla sap flow and its single branch water consumption with test meteorological factors. The results showed that under high air temperature and intense radiation on sunny days, the diurnal variation of C. microphylla sap flow appeared a broad peak curve, so as to adapt the circumstance of drought and water shortage via lower transpiration. The diurnal variations of sap flow and its dominant affecting factors differed with weather conditions, and photosynthetically effective radiation was always the dominant factor affecting the sap flow. The variation of the sap flow was the result of comprehensive effects of multi-meteorological factors, and the overall variation trend of water consumption of single branch was declined in the order of sunny days > cloudy days > windy days > rainy days, with the mean value being 459, 310, 281 and 193 mg x d(-1), respectively. |
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| Keywords: | sap flow velocity water consumption weather conditions Caragana microphylla Horqin sandy land |
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