【摘要】 运用农业气象学、气象学等理论建立了一个冬小麦群丛反射率农业气象数值模式。模式由辐射日变化反演、土壤反射率日变化反演以及植被反射率模拟等子模式耦合而成，运用该模式可以利用常规气象资料对冬小麦群丛反射率日变化进行较准确的模拟，实测验证结果表明模拟最大相对误差为12．1％，平均相对误差为6．3％，该模式为进一步估算农田热量平衡以及进行农业微气象研究提供了理论方法，并可充当作物生长数值模式中的一个子模式。更多还原

【Abstract】 In this paper an agrometeorological model for simulating the change of albedo of winter wheat during a day is established based on the theory of meteorology and agrometeorology. The model is united by three submodels, including the change of radiation,albedo of soil and albedo of plant during a day. In this model the data of general meteorological observation can be used to simulate the albedo of winter wheat accurately. Using the data observed by Li- 188B et al to verify the model,it was found that the mean error of the model is about 6. 3%,and the model can be used for estimating the heat balance in field or as a submodel for simulating crop growth.更多还原