ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

In order to quantify ground temperature and light distribution under furrow irrigation, a model of ground temperature and light transmission was developed, and changes of ground solar radiation and temperature in different positions of maize field with furrow irrigation were simulated. The model was based on the geometrical-physical relationship between ground surface structure and incident light, taking crops coverage into account under alternate furrow irrigation and conventional furrow irrigation. The results showed that the surface solar radiation and surface temperature at dry sites was higher than that at wet sites, and the difference changed among maize growing stage. At the same time, mean value of the surface solar radiation under alternative furrow irrigation was higher than that under conventional furrow irrigation by 18.64~30.60 W/m2, difference in the surface temperature was 0.38~3.00℃. the absolute deviation between the simulated and measured values of solar radiation in different sits of soil surface under different furrow irrigation methods was 0.23~24.89 W/m2, the MAE 3.36~13.79, the RMSE 4.90~13.51, the di 0.93~0.99; the absolute deviation between the simulated and measured values of soil temperature of soil surface was 0.1~1.7℃, the MAE 0.07~1.11, the RMSE 0.16~0.93, the di greater than 0.94. Therefore, changes of solar radiation and soil temperature in soil surface of furrow and ridge could be simulated by the model of ground temperature and light distribution with reasonable accuracy.