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| 半固定与固定沙地油蒿枝条水势及气体交换特征 | |
| 引用本文： | 夏静芳,王玉杰,张友焱,范军波.半固定与固定沙地油蒿枝条水势及气体交换特征[J].水土保持研究,2011,18(1):239-242. |
| 作者姓名： | 夏静芳 王玉杰 张友焱 范军波 |
| 作者单位： | 1. 北京林业大学水土保持学院,北京,100083;水利部水土保持植物开发管理中心,北京,100038 2. 北京林业大学水土保持学院,北京,100083 3. 中国林业科学研究院荒漠化研究所,北京,100091 4. 水利部水土保持植物开发管理中心,北京,100038 |
| 基金项目： | 国家科技支撑计划项目(2006BAD26B06); 国家农业节水专项(2002AA2Z4271) |
| 摘 要： | 为揭示半固定沙地和固定沙地油蒿生长差异的原因,测定了毛乌素沙地自然生长在半固定与固定沙地油蒿的气体交换参数、枝条水势及土壤含水量,分析了油蒿气体交换参数、枝条水势日变化特征及土壤水分对其的影响。结果表明:半固定沙地与固定沙地油蒿枝条水势与气体交换参数日变化趋势相同,半固定沙地油蒿日均净净净光合速率是固定沙地的1.3倍,蒸腾速率是固定沙地的1.23倍,其枝条水势也高于固定沙地,两种立地条件下油蒿枝条水势和气体交换参数的不同主要是由于沙地中土壤水分含量不同所引起。 |
| 关 键 词： | 半固定与固定沙地 土壤含水量 净光合速率 蒸腾速率 枝条水势 |
Water Potential of Branch and Gas Exchange Characteristics of Artemisia Ordosica in Semi-fixed and Fixed Sand Dunes |
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| XIA Jing-fang,WANG Yu-jie,MANG You-yan,FAN Jun-bo.Water Potential of Branch and Gas Exchange Characteristics of Artemisia Ordosica in Semi-fixed and Fixed Sand Dunes[J].Research of Soil and Water Conservation,2011,18(1):239-242. | |
| Authors: | XIA Jing-fang WANG Yu-jie MANG You-yan FAN Jun-bo |
| Institution: | XIA Jing-fang1,2,WANG Yu-jie1,ZHANG You-yan3,FAN Jun-bo2(1.School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China,2.China Administration Centre for Seabuckthorn Development,the Ministry of Water Resources,Beijing,100038,3.Institute of Desertification Studies,CAF,Beijing 100091,China) |
| Abstract: | Artemisia ordosica was one of the main sand-binding plants in Mu Us Sandland.The water potential of branch and parameter of gas exchange of Artemisia ordosica were measured under natural condition in semi-fixed and fixed sand dunes in Mu Us Sandland in July,the effect of soil water content on them and the character of diurnal change of them were studied.The results indicated that the diurnal courses of water potential of branch and gas exchange were the same in semi-fixed and fixed sand dunes,but the values... |
| Keywords: | soil water content photosynthetic rate transpiration rate gas exchange water potential of branch |
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