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本研究拟用热扩散探针法(TDP)于5—11月连续测量甘肃武威山区红柳的树干液流。结果表明:红柳液流速率以日为周期呈现出峰型曲线;液流速率对于气温、湿度、水汽压和地表温度等4个环境因子的响应中,相对湿度最为明显,水汽压最差。以西北干旱地区甘肃武威为例,树木绿化用水在耗水总量中占很大比例,对树木耗水规律的研究可以为制定灌溉制度,减少绿化用水提供依据。
In this study, we plan to continuously measure the sap flow of Tamarix ramosissima from May to November in the mountainous area of Wuwei, Gansu, using the thermal diffusion probe method (TDP). The results showed that the flow rate of Rhododendron chinense showed a peak curve in daily cycle. Among the four environmental factors such as temperature, humidity, vapor pressure and surface temperature, the relative humidity was the most obvious and the vapor pressure was the worst. Taking Wuwei, Gansu Province as an example, the greening water of trees accounts for a large proportion of the total water consumption. The study on the law of water consumption of trees can provide the basis for making irrigation system and reducing water for greening.