固沙植被黄柳、小叶锦鸡儿蒸腾耗水尺度提升研究  

Upscaling of the Transpiration and Water Consumption of Sand-fixing Vegetation Salix gordejevii and Caragana microphylla

作　　者：段利民[1] 童新[1] 吕扬[1] 闫雪[1] 刘廷玺[1] Wang Xi-xi 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,内蒙古自治区水资源保护与利用重点实验室,呼和浩特010018 [2]Hydraulics/Water Resources Laboratory,Department of Civil and Environmental Engineering,Old Dominion University,Norfolk VA 23529-0241,USA

出　　处：《自然资源学报》2018年第1期52-62,共11页Journal of Natural Resources

基　　金：国家自然科学基金项目(51369016,51620105003); 内蒙古农业大学优秀青年科学基金(2014XYQ-11); 内蒙古自然科学基金项目(2015MS0566); 教育部创新团队发展计划(IRT_17R60); 科技部重点领域创新团队(2015RA4013)

摘　　要：论文以科尔沁沙地主要固沙植被黄柳、小叶锦鸡儿为研究对象,基于生长季典型枝条茎流的逐日动态观测数据,以黄柳茎干截面积和小叶锦鸡儿叶面积实测数据为扩展纯量,实现了由枝条茎流向灌丛群落蒸腾耗水的尺度提升。结果表明:生长季黄柳和小叶锦鸡儿群落的蒸腾耗水量分别为287.26 mm和197.23 mm,黄柳的耐旱性相对较低。采用FAO Penman-Monteith公式计算出同时期两种植被群落的蒸散量分别为328.70 mm和233.15 mm。日蒸腾耗水量与日蒸散量变化趋势基本一致,两种植被的决定系数分别为0.717 3和0.678 7。论文所建立的尺度提升方法在荒漠化灌木植被蒸腾耗水估算方面行之有效,可为科学选育和管理固沙植被、确定合理造林密度等提供参考依据。This study measured the daily sap flow of the selected individual stems of sandfixing vegetation Salix gordejevii and Caragana microphylla in the Horqin Sandy Land,China,throughout the growing season.The stem cross-sectional area of Salix gordejevii and the leaf area of Caragana microphylla were selected as potential upscaling factors for modeling the transpiration of the communities across large area.The transpiration of the community Salix gordejevii and the community Caragana microphylla were found to be 287.26 mm and 197.23 mm,respectively,indicating that the drought tolerance of Salix gordejevii is lower than that of Caragana microphylla.The evapotranspiration of the two communities calculated with the FAO Penman-Monteith equation were 328.70 mm and 233.15 mm,respectively.The daily transpiration and evapotranspiration followed the similar trend,the coefficient of determination being 0.717 3 and 0.678 7,respectively.These results indicate that the upscaling method proposed in this paper is effective for estimating transpiration and water consumption of desert shrubs and provids a useful reference for the selection and management of sand-fixing vegetation and the determination of reasonable afforestation densities.

关 键 词：荒漠化 茎流 茎干截面积 叶面积 尺度提升 

分 类 号：Q945.17[生物学—植物学]