干旱区生态环境知识资源中心(Arid): 不同盖度下伊犁绢蒿荒漠草地光谱特征及盖度反演精度研究

Arid

	不同盖度下伊犁绢蒿荒漠草地光谱特征及盖度反演精度研究
其他题名	Study on the Spectral Characteristics and Coverage Inversion Accuracy of Seriphidium transiliense Desert Grassland under Different Covering Degrees
	王惠宁; 靳瑰丽; 范燕敏; 魏秀红; 韩万强
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2019
卷号	41 期号:2 页码:51-57
中文摘要	基于覆盖度变化影响地面光谱特征以及导致反演精度不高的问题,本研究借助SVC HR-768便携式光谱仪,于4月28日对伊犁绢蒿荒漠草地群落特征、地面光谱进行测定,研究在18~30%、31~40%、41%~50%、51% ~60% 4个覆盖度下群落冠层光谱变化特征,进而采用光谱波段,NDVI、RVI、DVI和SAVI对其进行反演.结果表明:(1)植物反射光谱随群落覆盖度的增加而降低.(2)覆盖度和反射率成负相关,可见光波段的相关系数与覆盖度无明显规律,近红外的部分波段内,覆盖度越大,相关系数越大.(3)采用相关性较大的单一波段进行反演时,覆盖度越大,反演精度越好;当覆盖度<30%, DVI反演精度最高;而当覆盖度>30%,SAVI对覆盖度的反演精度最好.
英文摘要	The change of coverage affects the spectral characteristics of the ground and leads to the problem of low inversion accuracy. In this study, the SVC HR 768 portable spectrometer was used to measure the characteristics of the desert grassland of Seriphidium transiliense and its spectrum in April by the method of systematic sampling. The community characteristics and ground spectra of desert grassland in yili were determined on April 28,and the spectral changes of community canopy were studied under four different coverages of 18~30%,31~40%,41%~50%,51%~60%. Then spectral bands, NDVI, RVI,DVI and SAVI were used for inversion. The results show : (1) The reflectance spectrum of plants decreased with the increase of community coverage. (2) Coverage and reflectance were negatively correlated, and there was no obvious regularity in the correlation coefficient between visible light band and coverage. Part of the near-infrared wave band was positively correlated with coverage. (3) When inversion was performed using a single band with a large correlation, the greater the coverage, the better the inversion accuracy. The DVI inversion accuracy was the highest when the coverage was less than 30%,while the SAVI had the best accuracy for coverage inversion when the coverage was greater than 30%.
中文关键词	伊犁绢蒿荒漠 ; 植被覆盖度 ; 高光谱 ; 反演
英文关键词	Seriphidium transiliense desert Vegetation coverage Hyperspectral Inversion
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6471248
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239721
作者单位	新疆农业大学草业与环境科学学院, 新疆草地资源与生态重点实验室, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	王惠宁,靳瑰丽,范燕敏,等. 不同盖度下伊犁绢蒿荒漠草地光谱特征及盖度反演精度研究[J]. 新疆农业大学,2019,41(2):51-57.
APA	王惠宁,靳瑰丽,范燕敏,魏秀红,&韩万强.(2019).不同盖度下伊犁绢蒿荒漠草地光谱特征及盖度反演精度研究.中国草地学报,41(2),51-57.
MLA	王惠宁,et al."不同盖度下伊犁绢蒿荒漠草地光谱特征及盖度反演精度研究".中国草地学报 41.2(2019):51-57.