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利用气象学、天文学和农业气象学知识建立了用日总辐射量反演辐射日变化过程来推算玉米冠层光分布状况的农业气象模型。利用实测资料进行验证，模拟误差在２４％～８７％之间。对冠层分层研究的结果表明，模拟误差随分层数的增加呈指数递减。实际应用中冠层分为３～５层较为合适。
The meteorological, astronomical and agrometeorological knowledge was used to establish an agricultural meteorological model for estimating the light distribution of corn canopy using the daily variation of daily total radiant flux. Using the measured data to verify, the simulation error is between 24% ~ 87%. The results of the canopy stratification study show that the simulation error decreases exponentially with the increase of the stratification number. In practice, the canopy is divided into 3 to 5 layers is more appropriate.