Identifying the spatiotemporal changes of annual harvesting areas for three staple crops in China by integrating multi-data sources

doi:10.1088/1748-9326/ab80f0

	Identifying the spatiotemporal changes of annual harvesting areas for three staple crops in China by integrating multi-data sources
	Luo, Yuchuan 2,3; Zhang, Zhao 2,3; Li, Ziyue 2,3; Chen, Yi 1,4; Zhang, Liangliang 2,3; Cao, Juan 2,3; Tao, Fulu 1,4
刊名	ENVIRONMENTAL RESEARCH LETTERS
	2020-07-01
卷号	15 期号:7 页码:15
关键词	agricultural system cropland land use/cover change rice maize wheat
ISSN号	1748-9326
DOI	10.1088/1748-9326/ab80f0
通讯作者	Zhang, Zhao(zhangzhao@bnu.edu.cn) ; Tao, Fulu(taofl@igsnrr.ac.cn)
英文摘要	Reliable and continuous information on major crop harvesting areas is fundamental to investigate land surface dynamics and make policies affecting agricultural production, land use, and sustainable development. However, there is currently no spatially explicit and time-continuous crop harvesting area information with a high resolution for China. The spatiotemporal patterns of major crop harvesting areas at a national scale have rarely been investigated. In this study, we proposed a new crop phenology-based crop mapping approach to generate a 1 km harvesting area dataset for three staple crops (i.e. rice, wheat, and maize) in China from 2000 to 2015 based on GLASS leaf area index (LAI) products. First, we retrieved key phenological dates of the three staple crops by combining the inflexion- and threshold-based methods. Then, we determined the grids cultivated for a certain crop if its three key phenological dates could be simultaneously identified. Finally, we developed crop classification maps and a dataset of annual harvesting areas (ChinaCropArea1 km), comprehensively considering the characteristics of crop phenology and the references of drylands and paddy fields. Compared with the county-level agricultural statistical data, the crop classification had a high accuracy, with R-2 values consistently greater than 0.8. The spatiotemporal patterns of major crop harvesting areas during the period were further analyzed. The results showed that paddy rice harvesting areas had expanded aggressively in northeastern China but decreased in southern China. Maize harvesting areas expanded substantially in major maize cultivation areas across China. Wheat harvesting areas declined overall, although they increased notably in their major production areas. The spatiotemporal patterns could be ascribed to various anthropogenic, biophysical, and social-economic drivers, including urbanization, reduced cropping intensity in southern China, frequent disasters from climate change, and large areas of abandoned farmland in northern and southwestern China. The resultant dataset can be applied for many purposes, including land surface modeling, agro-ecosystem modeling, agricultural production and land use policy-making.
资助项目	National Key Research and Development Program of China[2019YFA0607401] ; National Key Research and Development Program of China[2017YFA0604703] ; National Key Research and Development Program of China[2017YFD0300301] ; National Basic Research Program of China[41977405] ; National Basic Research Program of China[31561143003] ; National Basic Research Program of China[31761143006]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000615742300002
资助机构	National Key Research and Development Program of China ; National Basic Research Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/136151]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Zhao; Tao, Fulu
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 3.Beijing Normal Univ, Fac Geog Sci, MOE Key Lab Environm Change & Nat Hazards, Beijing 100875, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Luo, Yuchuan,Zhang, Zhao,Li, Ziyue,et al. Identifying the spatiotemporal changes of annual harvesting areas for three staple crops in China by integrating multi-data sources[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(7):15.
APA	Luo, Yuchuan.,Zhang, Zhao.,Li, Ziyue.,Chen, Yi.,Zhang, Liangliang.,...&Tao, Fulu.(2020).Identifying the spatiotemporal changes of annual harvesting areas for three staple crops in China by integrating multi-data sources.ENVIRONMENTAL RESEARCH LETTERS,15(7),15.
MLA	Luo, Yuchuan,et al."Identifying the spatiotemporal changes of annual harvesting areas for three staple crops in China by integrating multi-data sources".ENVIRONMENTAL RESEARCH LETTERS 15.7(2020):15.