水分胁迫对3个藤本树种蒸腾耗水性的影响

生长季节对水分胁迫条件下2年生盆栽常春藤、扶芳藤、小叶扶芳藤3个藤本树种的土壤水分状况、蒸腾速率及叶片水势等生理生态指标日变化进行了连续测定，以弄清水分胁迫对各树种蒸腾耗水特性的影响。研究表明，扶芳藤具有土壤水势、土壤容积、含水量最低，蒸腾速率却最大的特性，是最耗水的树种；小叶扶芳腾耗水特性表现为土壤水势和土壤容积含水量最高，蒸腾速率最低，是最不耗水的树种；常春藤介于这两者之间。相关性分析表明，这3个树种的蒸腾速率与气孔导度呈显著正相关，与土壤水势或土壤含水量、叶片水势有一定的相关性，与环境因子相关性不明显。

Influence of Soil Moisture on Transpiration Water Consumption of Three Lianas

The water consumption characteristics of three potted lianes,Hedera hepalensi,Euonymus fortunei and Euonymus fortunei.Minus under water stress condition,were studied during the growing season by the measurement of the diurnal change of their soil water potential,soil humidity,leaf water potential and transpiration.The result showed that Euonymus fortunei is a species of water potential which has the lowest soil humidity but the highest transpiration,Euongmus fortunei.Minus is a species of the lowest water consumption,the water consumption of Hedera hepalensis is between Euonymus fortunei and Euonymus fortunei.Minus.Correlation analysis showed that the three liana tree species' transpiration and stomotal conductance were correlated significantly,and relations between transpiration and soil water potential,soil humidity and leaf water potential were not significant.