基于茎流-蒸渗仪法的荒漠草原带人工灌丛群落蒸散特征

马龙龙, 杜灵通, 丹杨, 王乐, 乔成龙, 吴宏玥

Characteristics of evapotranspiration in planted shrub communities in desert steppe zone based on sap flow and lysimeter methods

MA Long-Long, DU Ling-Tong, DAN Yang, WANG Le, QIAO Cheng-Long, WU Hong-Yue

表2 茎流-蒸渗仪法和水量平衡法测定的人工灌丛群落5-8月蒸散总量对比

Table 2 Comparison of total evapotranspiration of a planted shrub communities measured by sap flow-lysimeter method and by water balance method from May to August

茎流-蒸渗仪 Sap flow-lysimeter method (mm) 水量平衡法 Water balance method (mm) 绝对误差 Absolute error (mm) 相对误差 Relative error (%) 丛下蒸散 ET under shrub canopy 灌木蒸腾 Transpiration of shrub 群落蒸散 Total ET of community 降水 Precipitation 土壤含水量变化 ?W 群落蒸散 Total ET of community 182.5 83.6 266.1 222.6 75.6 298.2 32.1 10.8