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A global analysis of agricultural productivity and water resource consumption changes over cropland expansion regions

文献类型：期刊论文

作者Liu, Zhengjia1,2; Liu, Yansui1,2; Wang, Jieyong1,2
刊名AGRICULTURE ECOSYSTEMS & ENVIRONMENT
出版日期2021-11-01
卷号321页码:9
关键词Global cropland expansion Agricultural productivity Water resource consumption Land use change Spatial analyses
ISSN号0167-8809
DOI10.1016/j.agee.2021.107630
通讯作者Liu, Zhengjia(liuzj@igsnrr.ac.cn) ; Wang, Jieyong(wjy@igsnrr.ac.cn)
英文摘要Cropland expansion often occurs on grasslands and partial forests. However, there is little quantified understanding of how cropland expansion affected the agricultural productivity and water resource consumption globally. In this study, we used spatially explicit satellite-based data, including land use maps, net primary productivity and evapotranspiration from 2001 to 2018, and the space-for-time substitution technique to investigate the relationships between cropland expansion and agricultural productivity and water resource consumption. Results showed that global cropland area presented a significant net increasing trend with 1.9 x 10(4) km(2)/a (p < 0.01) since 2000. Net increased cropland area over the Northern Hemisphere and the Southern Hemisphere occupied 27.1% and 72.9% of global total net increase, respectively. Large-area cropland expansion mainly focused on Eastern Asia, Southern Asia, Eastern Europe, Southern America, and Northern America. Particularly, cropland expansion in the Southern America deserved the greatest attention. At the global scale, new expanded croplands caused average NPP decrease and average ET decrease compared to original ecosystems, but performances were evident differences in subregions. Cropland expansion in the Southern America evidently decreased NPP and ET compared to other places. In contrast, new expanded croplands in most subregions of Asia and Northern America performed higher the agriculture productivity, while the increases were done at the expense of more water resource consumption. Although cropland expansion only slightly decreased NPP compared to original ecosystems globally, new expanded croplands often occurred in water-limited or temperature-limited areas according to precipitation and temperature gradations. This study suggests that cropland expansion should more consider sustainable land use and development, and reduce the risks of cropland expansion on natural ecosystems as much as possible.
WOS关键词NET PRIMARY PRODUCTIVITY ; CLIMATE-CHANGE ; FOOD SECURITY ; LOESS PLATEAU ; LAND ; MODIS ; IMPROVEMENTS ; WEATHER
资助项目National Natural Science Foundation of China[41971218] ; Strategic Priority Research Program of the Chinese Academy of Sciences, China[XDA23070302] ; Strategic Priority Research Program of the Chinese Academy of Sciences, China[XDA28130400]
WOS研究方向Agriculture ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000704402800002
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences, China
源URL[http://ir.igsnrr.ac.cn/handle/311030/166945]  
专题中国科学院地理科学与资源研究所
通讯作者Liu, Zhengjia; Wang, Jieyong
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Reg Sustainable Dev Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Zhengjia,Liu, Yansui,Wang, Jieyong. A global analysis of agricultural productivity and water resource consumption changes over cropland expansion regions[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2021,321:9.
APA Liu, Zhengjia,Liu, Yansui,&Wang, Jieyong.(2021).A global analysis of agricultural productivity and water resource consumption changes over cropland expansion regions.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,321,9.
MLA Liu, Zhengjia,et al."A global analysis of agricultural productivity and water resource consumption changes over cropland expansion regions".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 321(2021):9.

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来源：地理科学与资源研究所

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