Arid
DOI10.1080/00387010.2018.1463267
Biomass estimation of desert steppe based on spectral indices along a precipitation gradient
Yin, Xiaofei1,2; Wang, Chunguang1; Zong, Zheying1; Wang, Haichao1; Zhang, Haijun1; Zhang, Wenxia1
通讯作者Wang, Chunguang
来源期刊SPECTROSCOPY LETTERS
ISSN0038-7010
EISSN1532-2289
出版年2018
卷号51期号:7页码:324-331
英文摘要

Accurate estimation of grassland biomass in desert steppe is crucial for various studies such as grassland dynamic monitoring, scientific management, and environmental degradation. Observational tests were conducted in the Ordos desert steppe in July and August from 2014 to 2016 to measure the grassland biomass and grassland canopy spectral data along a precipitation gradient, to analyze the spectral reflectance characteristics and the correlation between different spectral indices and grassland biomass in the range of 350-1830nm, and to establish and verify a model for estimating grassland biomass of desert steppe. The results showed that the spectral reflectance of the Ordos desert steppe is similar to the spectral characteristics of typical green vegetation. The spectral reflectance values of control and of lightly, medium-, and heavily degraded plots successively increased in the visible light band at 350-696nm and decreased in the near-infrared band at 792-1349nm. The sensitive band of the normalized difference spectrum indices after optimization was 705 and 710. The coefficient of determination of normalized difference spectral indices (705 and 710) and grassland biomass was R-2=0.735. These values were significantly correlated at the p<0.01 level. The R-2 values of the fitted power function model and the verification power function model were 0.764 and 0.746, respectively. The root mean square error was 41.59g/m(2). The relative error was 28.37%, and the constructed power function model was the best model. Therefore, the optimized spectral indices can be used to effectively estimate the grassland biomass of desert steppe.


英文关键词desert steppe estimation model grassland biomass precipitation gradients spectral indices
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000457099200002
WOS关键词ESTIMATING ABOVEGROUND BIOMASS ; INNER-MONGOLIA ; GRASSLAND ; VEGETATION ; NITROGEN ; REGION ; MODEL ; RED
WOS类目Spectroscopy
WOS研究方向Spectroscopy
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/213297
作者单位1.Inner Mongolia Agr Univ, Coll Mech & Elect Engn, Hohhot 13948815406, Inner Mongolia, Peoples R China;
2.Hohhot Vocat Coll, Coll Mech & Elect Engn, Hohhot, Inner Mongolia, Peoples R China
推荐引用方式
GB/T 7714
Yin, Xiaofei,Wang, Chunguang,Zong, Zheying,et al. Biomass estimation of desert steppe based on spectral indices along a precipitation gradient[J],2018,51(7):324-331.
APA Yin, Xiaofei,Wang, Chunguang,Zong, Zheying,Wang, Haichao,Zhang, Haijun,&Zhang, Wenxia.(2018).Biomass estimation of desert steppe based on spectral indices along a precipitation gradient.SPECTROSCOPY LETTERS,51(7),324-331.
MLA Yin, Xiaofei,et al."Biomass estimation of desert steppe based on spectral indices along a precipitation gradient".SPECTROSCOPY LETTERS 51.7(2018):324-331.
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