7种园林绿化树种蒸腾耗水特性研究

以香樟、桂花、无患子、黄山栾树、沙朴、紫弹朴和珊瑚朴等7种园林绿化树种为研究对象,采用盆栽实验方法,用Li-6400便携式光合测定仪和ACS-D11电子天平等仪器,通过对其在不同天气条件下的瞬时蒸腾速率、日耗水量等进行了测定和研究。结果表明:1在水分充足条件下,7种供试树种在不同天气条件下的耗水速率基本一致,均是早晚低、中午前后高,呈双峰或单峰曲线;2日耗水量在不同天气条件下差异达到了极显著水平,而在不同树种间差异达到了显著水平,其中紫弹朴的日耗水量是极显著高于香樟,且显著高于其他5个树种。

A Study of Transpiration Water Consumption Characteristics of Seven Garden Species

Studies were made of instantaneous transpiration rate and daily water consumption of 7 common garden species （Cinnamomum camphora, Osmanthus fragrans, Sapirtdus mukorossi, Koelreuteria integrifoliola, Celtis sinensis, Celtis biondi, Celtis julianae） under different weather conditions by use of Li-6400 portable photosynthesis system and ACS-Dll electronic balance and by adopting a pot experiment. The results showed that ① under the conditions of sufficient water, the changes tendency of water consumption rate of 7 tested species in different weather conditions were basically the same, lower in the morning and the evening, higher at around midday, displaying the unimodal or bimodal curve; ②The differences of daily water consumption under different weather conditions reached an extremely significant level, the differences of different tree species reached a significant level, among them the daily water consumption of Celtis biondii was extremely significantly higher than that of Cinnamomum camphora, and significantly higher than that of the other 5 tree species.