中文摘要：

系统分析苹果花期冠层高光谱特征，探明其敏感光谱波段，为大面积苹果树信息提取与营养状况的遥感反演等提供理论依据。利用ASD Field Spec3便携式地物光谱仪实测的120个苹果花期的冠层高光谱数据，在分析了不同累计样本容量对花期冠层高光谱特征影响的基础上，采用方差分析的方法，明确了苹果花期的冠层高光谱特征及反映花期冠层高光谱的敏感波段。结果表明，随着累计样本容量的增加，苹果花期的高光谱曲线趋于稳定、平滑。在550nm绿峰处和760～1300nm的反射高原区，反射率随着花量的增多而减小，在670nm的红谷处，反射率随着花量的增多而增大；在350～400nm，400-500nm，600-680nm，760～1300nm波段的方差分析结果极显著，是反映花期冠层光谱的敏感波段；随着花量的增多，红边位置、红边斜率和红边面积有逐渐减小的趋势。

英文摘要：

The present study aims to systematically analyze the hyperspectral characteristics of apple florescence canopy and explore the sensitive spectra to provide the theoretical basis for large area apple information extracting and remote sensing retrieval for nutrition diagnosis. Based on the 120 hyperspectral data of apple florescence canopy acquired with ASD Field Spec 3 portable object spectrometer, the effects of different sample numbers on hyperspectral characteristics were analyzed. Using variance analysis method, the hyperspectral characteristics of apple florescence canopy and the sensitive wave bands were obtained. The results showed that with the increase in cumulative sample numbers, the hyperspectrurn curves of apple florescence became stable and smooth. At the 550 nm green peak and the 760-1 300 nm reflection plateau, the reflection rate reduced with the increase in flowering amount, while in the red valley of 670 nm, the reflection rate increased with the increase in flowering amount; At the wave bands of 350-500, 600 680 and 760-1 300nm the variance analysis results showed very significant differences, indicating that they were sensitive wave bands of florescence canopy. With the increase in flowering amount, the red-edge position, the red-edge slope and red-edge area tended to decrease gradually.