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为分析山东省参照作物腾发量（ET0）的时空分布规律及影响因素，采用 FAO-56 Penman-Monteith 方程计算山东省 24 个气象站点的逐日 ET0，通过统计分析和 Arc GIS 中反距离权重插值法，定量和定性分析了 ET0的时空分布特征。结果显示，1961—2011 年山东省平均 ET0为 1 161 mm，呈减小趋势，分布差异主要受空气动力因素影响；年内分布集中，5、6 月 ET0最大，占全年 27%，5—9 月受温度、湿度影响显著，10—4 月受日照时间、风速影响显著。空间上，ET0从西北到东南呈减小的趋势，内陆主要受温度、日照时间影响，东南沿海主要受湿度、风速影响，ET0空间分布与湿度显著负相关，采用湿度估算 ET0，平均相对误差为 2%。山东省 ET0空间分布的主控因子是湿度。
In order to analyze the spatiotemporal distribution and its influencing factors of reference crop evapotranspiration (ET0) in Shandong Province, daily ET0 of 24 meteorological stations in Shandong Province was calculated by FAO-56 Penman-Monteith equation. By statistical analysis and inverse distance weighted interpolation Method, quantitative and qualitative analysis of the spatial and temporal distribution characteristics of ET0. The results showed that the average ET0 in Shandong Province was 1 161 mm from 1961 to 2011, showing a decreasing trend. The distribution differences were mainly affected by aerodynamic factors. The distribution was concentrated during the year and the ET0 was the largest in May and June, accounting for 27% and 5-9 of the year Month by the temperature and humidity significantly affected, 10-4 by the sunshine time, wind speed significantly. Spatially, ET0 tends to decrease from northwest to southeast. Inland is mainly affected by temperature and sunshine duration. Southeastern coast is mainly affected by humidity and wind speed. ET0 spatial distribution is significantly negatively correlated with humidity. ET0 is estimated by relative humidity, mean relative error Is 2%. The main controlling factor of spatial distribution of ET0 in Shandong Province is humidity.