气象因子与梨叶片水分亏缺的相关分析

Analysis on Correlation Between Meteorological Factors and Water Deficit in Pear Leaf

对气象因子与梨叶片水分亏缺的研究结果表明，相对湿度与梨树各类枝叶片水分亏缺均呈显著或极显著的负相关关系。通径分析证实了湿度、温度的影响，肯定了气压对短枝叶片水分亏缺的影响。多元线性逐步回归分析与通径分析的结果完全一致。梨叶片水分亏缺的日变动态和季变动态的分析结果表明，在梨的生长季节前后期注意灌水对于减少水分亏缺，提高光合强度，增加产量具有现实意义。

The results of the study on the relationship between meteorological factors and water deficit in pear leaf showed that there was significant negative correlation between air humidity and pear leaf water deficit.The path analysis not only proved the influence of air humidity and temperature on pear leaf water deficit,but also fully affirmed the influence of atmospheric pressure on the pear leaf water deficit.The results of multiple step regression analysis were the same with the results of path analysis. The result of analysis on the daily and seasonal variations of the leaf water deficit showed that irrigation in the early and later growth season could reduce the leaf Water deficit,increase leaf photosynthesis and fruit yield.