玉兰蒸腾规律及移植过程中茎流变化研究

用GREENSPAN茎流测定系统监测玉兰树干茎流动态变化,使用HOBO气象站同步测定气象因子,分析不同天气情况下树体茎流变化与气象因子的关系.结果表明:太阳辐射是影响树体茎流变化的决定因素,气温和相对湿度是影响茎流变化的主导因子;通过多元线性回归分析建立评价茎流速率与气象因子关系的模型,利用此模型得到预测值与实测值之间的差别,通过比较预测值和实测值之间的差异研究水分失衡的程度.

Rule of Magnolia denudata Tree Transpiration and the Sap Flow Variation in the Course of Transplantting

Based on the synchronous measurements of the trunk sap flow by GREENSPAN sap flow system,and the variation of meteorological factors measured by HOBO automatic weather station apparatus,the correlations between the meteorological factors and dynamic variation of trunk sap flow of Magnolia denudata trees under different weather conditions were studied.The results indicated that solar radiation was the decisive factor that influenced the trunk sap flow,while temperature and relative humidity were the leading factors influencing the trunk sap flow.The regression model for evaluating the correlations between the trunk sap flow and the meteorological parameters was established through multi-linearity regression analysis.The differences between the calculated values and the measured values could be calculated by the regression model to study the extent of water shortage inside the M.denudata trees in the course of transplanting.