| 单株油蒿蒸腾耗水特征及其与环境因素的关系 |
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| 引用本文： | 高浩,秦树高,朱林峰,范冬庆,陈东,杨路明.单株油蒿蒸腾耗水特征及其与环境因素的关系[J].水土保持通报,2016,36(2):76-81. |
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| 作者姓名： | 高浩 秦树高 朱林峰 范冬庆 陈东 杨路明 |
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| 作者单位： | 北京林业大学水土保持学院宁夏盐池毛乌素沙地生态系统国家定位观测研究站,北京100083;北京林业大学水土保持与荒漠化防治教育部重点实验室,北京100083 |
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| 基金项目： | 国家重点基础科学研究发展(973)计划项目"沙区土壤水分时空分布格局与区域分异规律"(2013CB429901) |
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| 摘 要： | 目的]探究油蒿的蒸腾耗水规律及其对环境因子的响应,旨在为固沙植被建设提供科学依据。方法]利用野外大型称重式蒸渗仪于2014年6—9月底对单株油蒿的蒸腾过程进行连续观测,并同步监测了土壤含水量及相关气象因子。结果]油蒿单日蒸腾强度曲线在晴天表现为双峰曲线,而在阴雨天双峰曲线不明显;研究期间,单株油蒿蒸腾耗水量为101.66mm,日平均蒸腾强度为0.83mm/d。蒸渗仪内土壤蒸发量106.05mm,日平均土壤蒸发强度为0.87mm/d,试验期间蒸散量占降雨量的82.98%。降雨可以维持油蒿正常生长,并对土壤水分进行一定补充;油蒿蒸腾强度与空气相对湿度(p0.01)、空气温度(p0.01)、太阳净辐射(p0.01)和20cm深度土壤体积含水量(p0.05)具有很好的相关性,且相关性依次减小。结论]油蒿蒸腾耗水日变化明显,其蒸腾速率受土壤水分状况、气象条件及自身生理特征等因素的影响。
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| 关 键 词： | 毛乌素沙地 油蒿 蒸腾 环境因素 蒸渗仪 |
| 收稿时间： | 2015/3/16 0:00:00 |
| 修稿时间： | 2015/4/10 0:00:00 |
Characteristics of Water Consumption of Artemisia Ordosica Through Transpiration and Its Relationships with Environmental Factors |
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| GAO Hao,QIN Shugao,ZHU Linfeng,FAN Dongqing,CHEN Dong and YANG Luming.Characteristics of Water Consumption of Artemisia Ordosica Through Transpiration and Its Relationships with Environmental Factors[J].Bulletin of Soil and Water Conservation,2016,36(2):76-81. |
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| Authors: | GAO Hao QIN Shugao ZHU Linfeng FAN Dongqing CHEN Dong and YANG Luming |
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| Institution: | Yanchi Ecology Research Station of the Mu Us Desert, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing Forestry University, Minstry of Education, Beijing 100083, China,Yanchi Ecology Research Station of the Mu Us Desert, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing Forestry University, Minstry of Education, Beijing 100083, China,Yanchi Ecology Research Station of the Mu Us Desert, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing Forestry University, Minstry of Education, Beijing 100083, China,Yanchi Ecology Research Station of the Mu Us Desert, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing Forestry University, Minstry of Education, Beijing 100083, China,Yanchi Ecology Research Station of the Mu Us Desert, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing Forestry University, Minstry of Education, Beijing 100083, China and Yanchi Ecology Research Station of the Mu Us Desert, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing Forestry University, Minstry of Education, Beijing 100083, China |
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| Abstract: | Objective] Water consumption of Artemisia ordosica through transpiration was measured and its responses to environmental factors were researched to provide some hints for construction of sand-fixing vegetations. Methods] The dynamic transpiration of Artemisia ordosica was continuously measured using a large-scale weighing lysimeter, and the soil moisture content and related meteorological factors were synchronously monitored. Results] Mean daily transpiration intensity of Artemisia ordosica performed a bimodal curve in sunny days; while in rainy days, the mean daily transpiration intensity performed unimodal curve. Water consumption of Artemisia ordosica was 101.66 mm during the study period, averaged 0.83 mm/d per day. Soil evaporation in the lysimeter was 106.05 mm, about 0.87 mm/d. The evapotranspiration accounted for 82.98% of rainfall in the study period. Transpiration intensity of Artemisia ordosica were significantly correlated with environmental factors of relative air humidity(p < 0.01), atmospheric temperature(p < 0.01), net radiation(p < 0.01), soil water content at 20 cm depth(p < 0.05) in a decreased rank. Conclusion] Daily transpiration of Artemisia ordosica varied distinctly, and the transpiration rate was affected by soil moisture condition, meteorological factors and its own physical characteristics. |
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| Keywords: | Mu Us Desert Artemisia ordosica transpiration environmental factors lysimeter |
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