不同品种水稻群体冠层光谱特征比较研究

Canopy spectral characteristics of different rice varieties.

应用分光光谱辐射仪对不同株型水稻品种的冠层光谱辐射能进行观测和计算 ,比较分析了不同冠层群体光谱分布特征的差异性 .结果表明 ,不同株型水稻品种群体冠层内太阳光谱辐射反射率α、透射率β和吸收率τ及消光系数K存在明显差异 ,尤其以蓝光辐射 (4 0 0～ 5 10nm)差异最为显著 .在水稻生长后期 。

By using spectroradiameter,canopy spectral characteristics such as reflection rate (α),absorption rate (τ),transmission rate (β),and extinction coefficient(K) of different rice varieties were analyzed and compared. The results showed the canopy spectral characteristics were significantly different among different rice varieties,especially under blue radiation (400～510 nm). In addition,these dissimilarities were more obvious in the late stage of growth period.