---

作 者 ：张玉勋, 李建东

期 刊 ：植物生态学报 1991年 15卷 2期 页码：177-182

关键词：高度；盖度；植被指数；模型；地上生物量；

Keywords:Height, Cover, Vegetation index, Model, Aboveground biomass,

摘 要 ：羊草群落的高度和盖度与地上生物量存在良好的复相关关系(R=0.9316)，所获多元回归方程可用于该群落地上生物量的估测。通过对羊草群落、羊草+杂类草群落和贝加尔针茅群落植冠红光(0.63—0.69μm)和近红外辐射(0.76—0.90μm)反射率实测数据的分析，表明这些群落的光谱反射率比IR、IR/R和VI与地上生物量呈高度的指数相关关系，其中由VI和IR/R所获各群落不同生长时期地上生物量回归模型的估测效果较好。

Abstract:Height and coverag of Aneurolepidium chinense community had a good correlation with its biomass above ground(R= 0.9316). A multivariate regression equation was established for estimating aboveground biomass of the community. Data of spectral reflectance for simulated band3(0.63—0.69 um) and 4 (0.76—0.90um) of thematic mapper or landsat4or5,were collected with a handheld radiometer in three principal grassland plant communities (Aneurolepidium chinense community ,Aneurolepidium chinense + forbs community and Stipa baicalensis community)during plant growing seasons in 1988.The study showed that vegetation index(VI)had the best exponential correlationship with aboveground biomass in comparison with that of IR or IR/R for each of the communities. Therefore, with change of the growing seasons nine different spectral models related to VI for estimating aboveground biomass of the communities were established.

---