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以不同水分条件下盆栽苗木和大田幼林为材料，对土壤水分与毛白杨蒸腾耗水的关系进行了分析研究，并建立了蒸腾耗水量模型。结果表明，土壤水分含量与蒸腾耗水量之间呈极显著正相关，且土壤水分状况还影响蒸腾节律；蒸腾耗水量因不同的土壤水分条件、供水历程、气象等因素而具有不同的变化特点。
The relationship between soil water content and transpiration water consumption of Populus tomentosa was analyzed by using potted seedlings and young plantation under different water conditions. The model of transpiration water consumption was established. The results showed that there was a significant positive correlation between soil water content and transpiration water consumption, and soil moisture status also affected transpiration rhythm. Transpiration water consumption varied with different soil moisture conditions, water supply history and meteorological factors.