为了测算园林树木的蒸腾耗水量,应用热脉冲技术对阿克苏市3种常见绿化乔木(小叶白蜡、法国梧桐、桑树)进行树干液流的测定,并分析其日变化规律,同时运用自动气象站记录各气象参数数据,分析树干液流日变化与气象因子之间的相关性。结果显示:3种乔木树干液流速率之间有一定的差异,但其日变化过程几乎相似,均有明显的昼夜变化规律。白天的液流速率比夜间大,午间由于太阳辐射(Rs)过强出现午休现象,凌晨和晚上树干液流速率较低,夜间保持微弱的树干液流过程。小叶白蜡、法国梧桐、桑树等树干液流日变化都与太阳辐射、空气温度(Ta)、风速(Ws)呈显著正相关,而与空气湿度(H)呈显著负相关;逐步回归模型显示,影响小叶白蜡树干液流的主要气象因子是太阳辐射和空气湿度,模型拟合度为0.962,法国梧桐的是空气温度和空气湿度,拟合度为0.971,桑树的是空气温度和太阳辐射,拟合度为0.915。不同乔木的日累计液流量大小排序为小叶白蜡(57 000±2 400)m L﹥法国梧桐(55 400±2 100)m L﹥桑树(7 600±1 800)m L。 In order to estimate the transpiration water consumption of garden trees, the heat pulse technique was used to measure the sap flow of three kinds of common green trees (leaflet white wax, sycamore, mulberry) in Aksu City, and the daily variation was analyzed. At the same time, The meteorological parameters of the data, analysis of diurnal variations of sap flow and the correlation between meteorological factors. The results showed that there was a certain difference between the flow rates of tree species in the three tree species, but the diurnal variation processes were almost similar with obvious diurnal variation. During the daytime, the flow rate was higher than that at night. At noon, lunch break occurred due to too strong solar radiation (Rs), and the sap flow rate was low in the early morning and at night, leaving the weak sap flow at night. The diurnal variations of sap flow in stem, ash, sycamore, mulberry and other tree stems were significantly and positively correlated with solar radiation, air temperature (Ta) and wind speed (Ws), but negatively correlated with air humidity (H) The main meteorological factors that affect the leaf water flow of the ash were as follows: solar radiation and air humidity, the model fitting degree was 0.962, the air temperature and air humidity of Sycamore were 0.971, the mulberry air temperature and solar radiation The degree of coincidence is 0.915. The daily cumulative flow rates of different trees were as follows: lobular white wax (57 000 ± 2 400) m L> Sycamore (55 400 ± 2 100) m L> mulberry (7 600 ± 1 800) m L.