Variation of Sap Flow among Individual Trees and Scaling Up for Estimationof Transpiration of Larix principis rupprechtii Stand Diversity of Ground Dwelling Beetles (Coleoptera) in Larix principis rupprechtii Forest with Different Stages of Reforestation in Pangquangou National Nature Reserve Evapotranspiration characteristics of artificial and natural forests in Liupan Mountains of Ningxia, China during growth season.