Variation in Cropping Intensity in Northern China from 1982 to 2012 Based on GIMMS-NDVI Data

doi:10.3390/su8111123

	Variation in Cropping Intensity in Northern China from 1982 to 2012 Based on GIMMS-NDVI Data
	Ding, Mingjun 1,2; Chen, Qian 1; Xiao, Xiangming 2,3; Xin, Liangjie 4; Zhang, Geli 2; Li, Lanhui 4
刊名	SUSTAINABILITY
	2016-11-01
卷号	8 期号:11 页码:16
关键词	GIMMS-NDVI multiple cropping index (MCI) variation spatial-temporal patterns northern China
ISSN号	2071-1050
DOI	10.3390/su8111123
通讯作者	Chen, Qian(ppcastle93@hotmail.com)
英文摘要	Cropping intensity is an important indicator of the intensity of cropland use and plays a very important role in food security. In this study, we reconstructed a normalized difference vegetation index (NDVI) time-series from 1982 to 2012 using the Savitzky-Golay (S-G) technique and used it to derive a multiple cropping index (MCI) combined with land use data. Spatial-temporal patterns of variation in the MCI of northern China were as follows: (1) The MCI in northern China increased gradually from north-west to south-east; from 1982 to 2012, the mean cropping index across grid-cells over the study area increased by 4.36% per 10 years (p < 0.001) with fluctuations throughout the study period; (2) The mean MCI across grid-cells over the whole of northern China increased from 107% to 115% with all provinces showing an increasing trend throughout the 1980s and 1990s. Aside from Tianjin, Hebei, Beijing, and Shandong, all provinces also displayed an increasing trend between the 1990s and 2000s. Arable slope played an important role in the variation of the MCI; regions with slope <= 3 degrees and the regions with slope >3 degrees were characterized by inverse temporal MCI trends; (3) Drivers of change in the MCI were diverse and varied across different spatial and temporal scales; the MCI was affected by the changing agricultural population, deployment of food policies, and methods introduced for maximizing farmer benefits. For the protection of national food security, measures are needed to improve the MCI. However, more attention should also be given to the negative impacts that these measures may have on agricultural sustainability, such as soil pollution by chemical fertilizers and pesticides.
资助项目	National Natural Science Foundation of China[41571095] ; National Natural Science Foundation of China[41440004]
WOS关键词	TIME-SERIES DATA ; LAND-USE CHANGE ; DYNAMICS ; PATTERNS ; POLICY ; IMAGES ; URBAN ; AREA
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000389316200044
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/65513]
专题	中国科学院地理科学与资源研究所
通讯作者	Chen, Qian
作者单位	1.Jiangxi Normal Univ, Sch Geog & Environm, Minist Educ, Key Lab Poyang Lake Wetland & Watershed Res, 99 Ziyang Ave, Nanchang 330022, Peoples R China 2.Univ Oklahoma, Ctr Spatial Anal, Dept Microbiol & Plant Biol, 101 David L Boren Blvd, Norman, OK 73019 USA 3.Fudan Univ, Inst Biodivers Sci, Shanghai 200433, Peoples R China 4.Chinese Acad Sci, IGSNRR, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Ding, Mingjun,Chen, Qian,Xiao, Xiangming,et al. Variation in Cropping Intensity in Northern China from 1982 to 2012 Based on GIMMS-NDVI Data[J]. SUSTAINABILITY,2016,8(11):16.
APA	Ding, Mingjun,Chen, Qian,Xiao, Xiangming,Xin, Liangjie,Zhang, Geli,&Li, Lanhui.(2016).Variation in Cropping Intensity in Northern China from 1982 to 2012 Based on GIMMS-NDVI Data.SUSTAINABILITY,8(11),16.
MLA	Ding, Mingjun,et al."Variation in Cropping Intensity in Northern China from 1982 to 2012 Based on GIMMS-NDVI Data".SUSTAINABILITY 8.11(2016):16.