内蒙古多伦地区参考作物蒸发蒸腾量演变研究

用Penman—Monteith和Priestley—Taylor两种方法分别计算了多伦地区的参考作物蒸发蒸腾量（ET0），并对该地区的Ero演变情况进行了分析。经比较，Priestley—Taylor法计算所得Ero在量值上较大，但用两种方法计算得到的Ero整体趋势相同，以Penman-Monteith法计算结果为标准从整体上来分析该地区的ETo变化趋势、特点及其与不同要素之间的相关性，研究发现该地区年E％远大于年降雨量；E％整体上有微弱的减小趋势，呈现出平稳→增加→减少的过程；风速和日照对该地区E％的影响较大。可为当地生产及人类活动调控提供参考。

Study on estimation methods and variation trend of ET0 in Duolun prefecture of Inner Mongolia

The paper used Penman -Monteith equation and Priestley -Taylor equation to calculate the reference evapotranspiration of Duolun,and analyzed the change ofET0 . Through contrast, ETo value cal- culated by Priestley - Taylor equation is larger, but the trend calculated by two methods is ahnost the same. Using the results calculated by Penman -Monteith method as the standard, the paper analyzed the trend of ET0 change and features and correlation between ETo and different elements. The research showed that yearly ETo was far greater than annual rainfall in the area. The ETo has a slight decrease trend on the whole,and presents a process of smooth - increase - decrease. Wind speed and sunshine have a larger impact on ETo . The results may provide some references for agricultural production and human activities . Key words ： reference evapotranspiration ; Penman - Monteith equation ; Priestley - Taylor equation ; me- teorological factor