干旱区生态环境知识资源中心(Arid): 基于NDVI的农牧交错带草地植被数量动态研究

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	基于NDVI的农牧交错带草地植被数量动态研究
其他题名	Grassland Vegetation Dynamics Based on NDVI in the Farming-Pastoral Ecotones in the North of China
	刘云芳; 李瑞; 张克斌; 王百田
ISSN	1003-7578
出版年	2007
卷号	21 期号:10 页码:137-143
中文摘要	为研究农牧交错带草地植被动态及其主要影响因子,为草地植被动态监测提供技术、理论支撑,本文选取地处农牧交错带的宁夏盐池为研究区域.在遥感影像处理软件ERDAS IMAGING 8.7和多元统计软件SPSS 13等支持下,运用回归分析方法建立研究区最佳NDVI-生物量反演回归模型,在此基础上反演研究区2002-2005年植物生长季节(7-8月)植物生物量.2002-2005年研究区生物量等级类型动态研究结果表明:2002-2005年研究区植被年际间波动较大,等级Ⅳ(生物量3000-5000kg/hm2)、Ⅴ(5000-7000kg/hm2)、Ⅵ(＞7000kg/hm2)是盐池县植被生长状况较好的区域,三个等级面积之和最大的是2003年,606955.1hm2,是4年中植被生长状况最好的一年,其次是2002年和2004年,分别为551733.12hm2和550895.4hm2,最小的是2005年为270909.9hm2.以植被生长状况最好的2003年的等级Ⅳ、Ⅴ、Ⅵ面积之和606955.1hm2为1,则2002年为0.909,2004年为0.908,2005年为0.446.分析植被年际间波动的原因主要有2个方面:一是气象因子如降水、温度等,其中降水对农牧交错带植被动态影响最大,但存在滞后效应.二是人为因子,包括有利因子和不利因子.有利因子如退耕还草、人工封育、撂荒等草地植被恢复及荒漠化防治措施以及相关的荒漠化防治政策法规的实施,不利因子如偷牧、滥垦、滥樵等.
英文摘要	In order to study the grassland vegetation dynamics and its main influencing factors as well as to supply technique and theory for vegetation dynamics monitoring,Yanchi County,Ningxia Hui Autonomous Region in the Farming-Pastoral Ecotones in the north of China were selected as the study objects.The NDVI-biomasses inversion model was built by using the remote sensing image treating software ERDAS IMAGING 8.7 and statistic software SPSS 13.Based on the inversion model,the plant biomass in growing season（July.to Aug.） from 2002-2005 were inversed.The study results of vegetation dynamics showed that the vegetation interannual fluctuation was dramatic during 2002-2005.The gradation Ⅳ,Ⅴ and Ⅵ were the area that vegetation growth status was well.The sum area of the three gradations was 606955.1hm^2 in 2003,which was the maximum during 20022005;Next were 551733.12hm^2 and 550895.4hm^2 in 2002 and 2004;The minimum was 270909.9hm^2 in 2005.If the sum area of gradation Ⅳ,Ⅴ and Ⅵ was taken as 1,then that was 0.909 in 2002,0.908 in 2004 and was 0.446 in 2005,the minimum.The main factors affected the vegetation interannual fluctuation were two aspects： One was meteorological factors such as precipitation,temperature and so on.The precipitation was one of the most great influencing factors in the farming-pastoral ecotones.The other one was human influences,including advantageous and disadvantageous influences.The advantageous one mainly included different measures of vegetation restoration such as fencing,rehabilitated fields,abandoned land etc.and polices or laws about desertification debating.The disadvantageous influences included illegal grazing,estrepement,firewood cutting and so on.
中文关键词	农牧交错带 ; 生物量 ; 反演模型 ; 植被动态
英文关键词	NDVI NDVI the farming-pastoral ecotones biomass inversion model vegetation dynamics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2928079
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221085
作者单位	北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室, 北京 100083, 中国
推荐引用方式 GB/T 7714	刘云芳,李瑞,张克斌,等. 基于NDVI的农牧交错带草地植被数量动态研究[J]. 北京林业大学,2007,21(10):137-143.
APA	刘云芳,李瑞,张克斌,&王百田.(2007).基于NDVI的农牧交错带草地植被数量动态研究.,21(10),137-143.
MLA	刘云芳,et al."基于NDVI的农牧交错带草地植被数量动态研究".21.10(2007):137-143.