Biomass estimation of alpine grasslands under different grazing intensities using spectral vegetation indices

CORC > 中国农业科学院 > 农业环境与可持续发展研究所 > 气候变化研究室

	Biomass estimation of alpine grasslands under different grazing intensities using spectral vegetation indices
	Duan, Minjie 1,2; Gao, Qingzhu 1,2; Wan, Yunfan 1,2; Li, Yue 1,2; Guo, Yaqi 1,2; Ganzhu, Zhabu 1,2; Liu, Yuntong 1,2; Qin, Xiaobo 1,2
刊名	CANADIAN JOURNAL OF REMOTE SENSING
	2011
卷号	37 期号:4 页码:413-421
ISSN号	1712-7971
通讯作者	Duan, Minjie
英文摘要	We measured and analyzed the spectral reflectance characteristics and biophysical properties such as biomass and vegetation cover of purple feather-grass (Stipa purpurea) alpine steppe grassland under different grazing intensities (no grazing, light, moderate, and heavy grazing) during the growing season. We investigated the effects of grazing intensities on the spectral reflectance and red edge parameters of S. purpurea alpine steppe grassland and established potential models of biomass estimation based on the relationship of spectral vegetation indices and measured alpine grassland biomass in Northern Tibet, China. The results indicated that the spectral reflectance of alpine grassland is similar to the spectral characteristics of typical green vegetation. Reflectance in the near-infrared region of the no grazing treatment was higher than the grazing treatments, while the reflectance of the no grazing treatment in the visible light region was weaker than the grazing treatments. With enhanced grazing intensity, the spectral reflectance of grass canopy followed an increasing trend; the red edge position moved to longer wavelengths, and the amplitude of the red edge decreased in alpine grassland. A significant relationship of measured aboveground biomass and vegetation indices was caculated based on spectral reflectance. Hence, the optimized soil adjusted vegetation index is prefered for the estimation of aboveground biomass of S. purpurea alpine steppe in Northern Tibet, China.
学科主题	Remote Sensing ; REMOTE SENSING
语种	英语
出版者	CANADIAN AERONAUTICS SPACE INST
WOS记录号	WOS:000305249600009
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19920]
专题	农业环境与可持续发展研究所_气候变化研究室
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China 2.Minist Agr, Key Lab Agroenvironm & Climate Change, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Duan, Minjie,Gao, Qingzhu,Wan, Yunfan,et al. Biomass estimation of alpine grasslands under different grazing intensities using spectral vegetation indices[J]. CANADIAN JOURNAL OF REMOTE SENSING,2011,37(4):413-421.
APA	Duan, Minjie.,Gao, Qingzhu.,Wan, Yunfan.,Li, Yue.,Guo, Yaqi.,...&Qin, Xiaobo.(2011).Biomass estimation of alpine grasslands under different grazing intensities using spectral vegetation indices.CANADIAN JOURNAL OF REMOTE SENSING,37(4),413-421.
MLA	Duan, Minjie,et al."Biomass estimation of alpine grasslands under different grazing intensities using spectral vegetation indices".CANADIAN JOURNAL OF REMOTE SENSING 37.4(2011):413-421.