干旱区生态环境知识资源中心(Arid): 近30年山丹天然草原面积及盖度变化

Arid

	近30年山丹天然草原面积及盖度变化
其他题名	Change Analysis of Grassland Area and Vegetation Coverage of Shandan Nearly 30Years
	俞慧云 1; 俞联平 1; 史静 2; 陈本建 3
来源期刊	草地学报
ISSN	1007-0435
出版年	2017
卷号	25 期号:2 页码:387-394
中文摘要	本研究将3S技术与地面调查相结合,选择决策树分类和像元二分模型等方法,对山丹草原资源和草地植被盖度现状及变化进行了研究与评价。结果表明:研究区草原总面积39.59万hm~2,其中高寒草甸、山地草甸、温性草原、温性荒漠和温性草原化荒漠分别为8.47,3.14,9.61,8.23和10.14万hm~2;2014年研究区草原总面积比1987年减少了2.59万hm~2,山地草甸、温性草原、温性草原化荒漠和温性荒漠分别减少了8592.75,2377.08, 3357.69和11559.75 hm~2。各类型草地平均盖度依山地草甸、高寒草甸、温性草原、温性草原化荒漠和温性荒漠次序降低,分别为82.35%,57.60%,33.79%,17.07%和9.94%,正常年份分别以Ⅱ,Ⅰ,Ⅳ,V和V级草地盖度为主;从1987年到2014年,山地草甸盖度呈现逐年降低的趋势,高寒草甸呈先上升后下降趋势,温性草原、温性草原化荒漠和温性荒漠呈先下降后上升趋势。
英文摘要	Combining3Stechnology with ground survey in this research,we evaluated present situation and change analysis of grassland resource and vegetation coverage by decision tree classification and dimidiate pixel model.The results showed that the total grassland area of study area was 395900 hm~2 in 2014, which decreased 25900 hm~2 compared with the year 1987.The grassland area of alpine meadow,mountain meadow,temperate steppe,temperate desert and temperate steppe-desert were 84700,31400,96100, 82300 and 101400 hm~2,respectively.Mountain meadow,temperate steppe,temperate steppe-desert and temperate desert were decreased by 8592.75,2377.08,3357.69 and 11559.75 hm~2.The average coverage of mountain meadow,alpine meadow,temperate steppe,temperate steppe-desert and temperate desert were 82.35%,57.60%,33.79%,17.07%and 9.94%respectively.The vegetation coverage grades were Ⅱ,Ⅰ,Ⅳ,V and V mainly in normal years.The coverage of mountain meadow decreased year by year, and the alpine meadow increased firstly and then decreased,but the temperate steppe,temperate steppedesert and temperate desert decreased firstly and then increased from 1987 to 2014.
中文关键词	山丹 ; 决策树分类 ; 像元二分模型 ; 草原资源 ; 植被盖度
英文关键词	Shandan Decision tree classification Dimidiate pixel model Grassland area Vegetation coverage
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:6019173
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235633
作者单位	1.甘肃省草原技术推广总站, 兰州, 甘肃 730010, 中国; 2.广西壮族自治区畜牧研究所, 南宁, 广西 530001, 中国; 3.甘肃农业大学草业学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	俞慧云,俞联平,史静,等. 近30年山丹天然草原面积及盖度变化[J]. 甘肃农业大学,2017,25(2):387-394.
APA	俞慧云,俞联平,史静,&陈本建.(2017).近30年山丹天然草原面积及盖度变化.草地学报,25(2),387-394.
MLA	俞慧云,et al."近30年山丹天然草原面积及盖度变化".草地学报 25.2(2017):387-394.