摘要： 本文通过小麦和土壤光谱反射率测定，分析了不同生育期、不同长势麦田的光谱特性。结果表明，长势越好的麦田在近红外波段的反射率越高，而在可见光波段的反射率却越低，为此NIR/VIS此值对小麦估产是有用的数据。运用NOAA卫星AVHRR传感器的第一通道（可见光）和第二通道（近红外）的资料，建立光谱产量模武对天津地区进行小麦估产，准确率达90%以上。

关键词: 小麦反射光谱特性, 估产

Abstract: By means of the measurement of spectral reflectivity of wheat and soil,this paper analyzed the spectral reflective characteristics of wheat and soil in several wheat field in different growing stage and different growing vigour.Themore vigorous wheat field the higher reflectivity within the near-infrared range,whereas the lower the reflectivity within the visible band.Therefore,the ratio NIR/VIS is valuable to the estimation of wheat yield.The estimation of wheat yield in Tianjin area was made through the establishmenf of the spectrumyield model,the data was obtained by using the NOAA AVHRR Channel1 (visible) and Channel2 (nearinfrared),The accuracy is higher 90%.