不同生长期杉木植被指数与蓄积量的关系

处于不同生长期的人工杉木林,其各种生物量的生长和呈现的植被光谱区别较大。利用野外林木的样地实测数据和QuickBird遥感影像呈现的植被光谱,从高分辨率遥感影像获取一系列植被指数,评价不同生长期的人工杉木林的生长状况。结果表明:多个植被指数与蓄积量存在显著的正相关关系,其中比值植被指数(RVI)与蓄积量的相关性大于归一化植被指数(NDVI)、环境植被指数(EVI)和归一化差异绿度指数(NDGI),特别是在杉木处于速生阶段时,可将比值植被指数作为其它估测模型的一种验证。

Relationship between vegetation indices and volume of Cunninghamia lanceolata (Lamb.) Hook. plantation in different growth periods

In different growth periods of Cunninghamia lanceolata(Lamb.) Hook.plantation,there are significant differences between the growth of various biomass and the rendered vegetation of C.lanceolata plantation.Using field measurement data and vegetation indices derived from the spatial resolution remote sensing images of QuickBird,a case of evaluation of the growth of C.lanceolata plantation in different growth periods was described.The results showed that ratio vegetation index(RVI) had a more significant positive relation to the stock volume than normalized difference vegetation index(NDVI),environmental vegetation index(EVI) and normalized difference green index(NDGI).RVI could be used as an authentication means of estimating model for the stock volume of C.lanceolata plantation at their fast-growing stage.