中文摘要：

为了量化不均匀下垫面的地面光温分布，在作物生长条件下研究交替隔沟灌溉和常规沟灌在不同近地面环境下的地面光温分布规律，根据地表结构与太阳入射光线的物理几何关系，建立了地面光温传输模型，模拟地面不同点位处的太阳辐射和温度变化。结果表明，交替隔沟灌溉在非湿润点的地面太阳辐射量和地表温度高于湿润点，这种差异随玉米不同生长阶段而改变；在同一时间，交替隔沟灌溉的地面平均辐射量高于常规沟灌18．64—3（1．60W／m^2，地表温度高于常规沟灌0．38—3．00℃。不同沟灌方式下地面不同点位处的太阳辐射模拟结果与实测值间绝对偏差为0．23～24．89W／m^2，模拟偏差（MAE）为3．36～13．79，标准差（RMSE）为4．90-13．51，拟合度di为0．93—0．99；地表温度模拟结果与实测值间绝对偏差为0．1—1．7℃，MAE为0．07—1．11、RMSE为0．16—0．93、拟合度d；在0．94以上。所建光温传输模型较好地模拟了沟垄表面的太阳辐射和温度变化。

英文摘要：

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~C. 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 d~ 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.