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对模拟植物冠层温度的能量平衡单层模型进行了某些方法上的改进。并使用实测小气候资料，用数值方法，模拟了玉米冠层顶部的温度，模拟结果与实测的冠层温度相符合。利用冠层温度下的饱和水汽压估算了玉米冠层顶部结露的持续时间和结露量。结果表明：在中纬度低平原地区秋季的晴天，大约下午１７００开始结露，清晨６００～７００结束，结露的持续时间约１３～１４ｈ。露形成的时间进程为开始和结束急剧，中间维持稳定，呈倒“Ｕ”字。结露速率在０．０５～０．０７ｇｍ－２ｓ－１。
Some methodological improvements have been made to the energy balance monolayer model that simulates plant canopy temperature. The measured microclimate data are used to simulate the temperature of the top of corn canopy by numerical method. The simulation results are consistent with the measured canopy temperature. Using the saturated vapor pressure at the canopy temperature, the duration and amount of dew formation on the top of corn canopy were estimated. The results showed that in sunny autumn in mid-latitude low plains, dew condensation started at about 1700 in the early morning and ended at 600-700 in the morning. The duration of dew condensation was about 13-14h. Dew formed the process of time for the start and end sharp, the middle of the maintenance of stability, was inverted “U” word. The dew rate is 0.05 ~ 0.07gm-2s-1.