Upscaling of the Transpiration and Water Consumption of Sand-fixing Vegetation Salix gordejevii and Caragana microphylla
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 197.23mm,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.
NETL
NSTL
万方数据
维普
