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DOI10.2166/wcc.2013.064
Effects of changes in climatic variables on maize crop water requirements in Huang-Huai-Hai watersheds; China
Mou X.; Xia X.; Gong D.; Liu Q.; Wu Q.; Guo J.
发表日期2014
ISSN20402244
起始页码176
结束页码191
卷号5期号:2
英文摘要The study of crop water requirements (CWR) under climate change is critical for reasonable crop irrigation. In the present study, the effects of changes in climatic variables from 1961 to 2010 on maize CWR in Huang-Huai-Hai (HHH) watersheds in China were investigated. Five daily climatic factors including maximum temperature (Tmax), minimum temperature (Tmin), wind speed (u2), sunshine hours (nsun), and relative humidity (RH) from 121 weather stations during the maize growing season were studied. The Penman-Monteith method was employed to calculate crop evapotranspiration (ETc), and the spatiotemporal distribution characteristics of ETc and climatic factors were investigated via singular value decomposition. Results showed that the ETc of spring maize slightly increased by 0.4% during the past 50 years, which was primarily caused by the increase in Tmax. The ETc of summer maize decreased by 10.5%, which was primarily caused by the decrease in nsun and u2. Overall, the ETc followed the same spatiotemporal change trend as those of Tmax, nsun, and u2 in the HHH, whereas no coexisting spatiotemporal change between ETc and RH, as well as Tmin, was observed. This result suggests that changes in Tmax, nsun, and u2 are the main climatic factors that influence maize CWR in the HHH. © IWA Publishing 2014.
英文关键词Climate change; Crop water requirement; Huang-Huai-Hai watersheds; Maize; Singular China value decomposition
语种英语
scopus关键词Crops; Watersheds; Crop evapotranspiration; Crop water requirements; Maize; Maize growing season; Penman-Monteith method; Spatio-temporal changes; Spatiotemporal distributions; Value decomposition; Climate change; climate change; climate conditions; crop production; evapotranspiration; irrigation; maize; Penman-Monteith equation; relative humidity; spatiotemporal analysis; watershed; wind velocity; China
来源期刊Journal of Water and Climate Change
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/148284
作者单位School of Environment, Beijing Normal University, State Key Laboratory of Water Environment Simulation, Beijing 100875, China; School of Chemical and Environmental Engineering, Chongqing Three Gorges University, Wanzhou 404100, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
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GB/T 7714
Mou X.,Xia X.,Gong D.,et al. Effects of changes in climatic variables on maize crop water requirements in Huang-Huai-Hai watersheds; China[J],2014,5(2).
APA Mou X.,Xia X.,Gong D.,Liu Q.,Wu Q.,&Guo J..(2014).Effects of changes in climatic variables on maize crop water requirements in Huang-Huai-Hai watersheds; China.Journal of Water and Climate Change,5(2).
MLA Mou X.,et al."Effects of changes in climatic variables on maize crop water requirements in Huang-Huai-Hai watersheds; China".Journal of Water and Climate Change 5.2(2014).
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