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利用美国ＳＥ５９０辐射分光光谱仪对晴天中午冬小麦冠层各种辐射光谱成分进行了测定研究，给出了冠层上方总辐射、反射辐射及基部透射辐射的各种光谱变化规律，研究表明冠层上方总辐射、反射辐射、基部透射辐射及吸收辐射中光合有效辐射所占百分比分别为４７９％、１６２％、２１６％和７３９％。在此基础上，进一步给出了小麦冠层反射率光谱变化规律，并利用三次样条函数对冬小麦冠层反射率光谱曲线进行模拟，结果表明２５６组实测数据组成的反射率—波长曲线可以由１２组实测数据通过三次样条函数进行较为准确的模拟，平均模拟误差为４７％，从而为冬小麦反射率光谱曲线数据压缩，建立作物遥感数据库提供了一种理论方法。
Using the United States SE590 radiation spectrophotometer for noon sunny wheat canopy at various radiation spectral components were measured and given the top of the canopy above the total radiation, the reflected radiation and the base of the transmission radiation of the various spectral changes, the study shows that the top of the canopy total The percentage of photosynthetically active radiation in radiation, reflected radiation, base transmitted radiation and absorbed radiation were 479%, 162%, 216% and 739%, respectively. On this basis, the law of spectral reflectance of wheat canopy is further given. The cubic spline function is used to simulate the spectral reflectance curve of winter wheat canopy. The results show that the reflectance - The experimental data of 12 groups were more accurately simulated by cubic spline function with the average simulation error of 47%, which provided a theoretical method for data compilation of spectral curve of reflectivity of winter wheat and establishment of crop remote sensing database.