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应用热脉冲式液流测定系统 (HPVR)和Delta T自动气象站 ,对华北土石山区的主要造林树种油松的液流变化及其与环境因子的关系进行了 1年的观测 .对液流的日变化、各位点液流及最大液流位点的时空变异性进行了深入地研究 ,分析了水分胁迫条件下的液流特征 .应用SPSS系统对平均液流速度和环境因子的统计分析表明 ,辐射强度、风速、空气温度是影响液流的主要因子 ,相对湿度与土壤温度的影响较小 ,并给出了依据气象因子估算液流速度的统计模型
Using the HRPR system and the Delta T automatic weather station, the change of liquid flow of Pinus tabulaeformis, an important afforestation tree species in the rocky mountainous area of North China, and its relationship with environmental factors were observed for one year. Diurnal variation, the spatial and temporal variations of the maximum and maximum flow sites were studied in detail, and the characteristics of liquid flow under water stress were analyzed.Statistical analysis of average flow velocity and environmental factors using SPSS showed that, Radiation intensity, wind speed and air temperature are the main factors that affect the flow, and the relative humidity has little influence on the soil temperature. A statistical model for estimating the flow velocity based on meteorological factors is given