农田小麦状况的光谱特征分析

根据田间光谱观测提出了小麦光谱特征点(可见光、近红外、中红外)反射率域值和三个小麦生育光谱特征段，并利用统计分析法确定出不同农田小麦状况下光谱响应差异最明显时期、分辫小麦不同状况下的最佳光谱段。并以实际资料找出小麦反射光谱达饱合点时的LAI值以及小麦受灾后在光谱上的变化。

The Spectral Character Analyses for State of Wheat in Field

According to field spectral observation, we obtained reflectance value region of wheat spectrue character point (visible. near-IR. middle-IR ) and three spectral character segment of wheat development stage. By using statistical analysis. We have determined spectral differnce obvious period for different growing condition and thus obtained the best spectral band for distinguishing difference state of wheat in field. The LAI of spectral satuation for wheat and spectral change after disaster of wheat were faund on practical base.