干旱区生态环境知识资源中心(Arid): 基于照相法的荒漠草原植被覆盖度测定方法

Arid

	基于照相法的荒漠草原植被覆盖度测定方法
其他题名	The Method of Extracting Vegetation Coverage in the Desert Steppe Based on Photographic
	随金明; 宋乃平; 薛毅; 陈娟; 陈晓莹; 吴婷; 李敏岚
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:58-64
中文摘要	荒漠草原植被稀疏、空间异质性与年季变化大.植被覆盖度是评价荒漠草原生态状况关键指标之一,但长期以来缺少快速、精准的测定方法.利用普通相机与ADC多光谱相机对地表拍照,结合监督分类、归一化差异指数法(以下简称NDI)提取地表植被覆盖度参数,并以2020格网密度针刺法模拟结果为基准值,分析不同传感器及提取方式下的精度与适宜性.主要结果:(1)15x15格网密度针刺法可实现荒漠草原地表植被覆盖度高效、准确测定,当覆盖度高于60%时1010格网密度最宜;(2)相比ADC多光谱照片及普通数码照片的监督分类,基于普通数码照片的NDI法能更准确提取荒漠草原植被低覆盖度,且较针刺法工作效率大幅提高.
英文摘要	The vegetation in the desert steppe is sparse and high spatial heterogeneity due to varied precipitation and another factors. Vegetation coverage is one of the key ecological indicators to evaluate desert steppe. However, there has been a lack of rapid and accurate measurement methods for a long time. At present, the photogrammetry is the most convenient and effective method for estimating the vegetation cover on the ground compared with another. Therefore, it is very important to explore a set of methods that accurate, rapid and effective to extract the surface vegetation coverage in the desert steppe. We took photos of different habitats by using the ordinary digital camera and Agriculture Digital Camera in the village of Yanjigou, Yanchi County, Ningxia. The vegetation coverage on the ground was extracted by supervised classification and NDI. We explored the practical application of different sensors and different extraction methods in the desert steppe by comparing the extracted values with the results of acupuncture at a density of 20X20. The result shows that: (1) The surface vegetation coverage in the desert steppe can be extracted economically, reasonably and accurately by acupuncture with a density of 15 15. It is appropriate to adopt 10 10 density acupuncture to extracte when the coverage exceeds 60% of the limit (2) Compared with the supervised classification of ADC multi-spectral photos and ordinary digital photos, The NDI method based on ordinary digital photos can more easily and accurately extract the desert steppe with low vegetation coverage.
中文关键词	荒漠草原 ; 植被覆盖度 ; 照相测定方法 ; 针刺法
英文关键词	NDI Desert steppe Vegetation coverage Photographic determination Acupuncture Normalized Difference Index
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:6471249
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239722
作者单位	宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	随金明,宋乃平,薛毅,等. 基于照相法的荒漠草原植被覆盖度测定方法[J]. 宁夏大学,2019,41(2):58-64.
APA	随金明.,宋乃平.,薛毅.,陈娟.,陈晓莹.,...&李敏岚.(2019).基于照相法的荒漠草原植被覆盖度测定方法.中国草地学报,41(2),58-64.
MLA	随金明,et al."基于照相法的荒漠草原植被覆盖度测定方法".中国草地学报 41.2(2019):58-64.