草业学报2016，Vol.25Issue(5)：13-20,8.DOI:10.11686/cyxb2015349
内蒙古不同类型草原区 Hargreaves 计算参考作物蒸散量的适用性分析
An evaluation of the Hargreaves method for estimating reference evapotranspiration in different grassland types in Inner Mongolia,China
摘要
Abstract
Reference crop evapotranspiration (ET0 )is a comprehensive indication of the effect of meteorological conditions on crop water requirement,and it is an important tool for grassland management and water resource monitoring.Using meteorological data from 1971 to 2014,ET0 in 6 stations was calculated by Penman-Monteith and Hargreaves models,the performance of the Hargreaves model in different types of grassland in Inner Mongolia was analyzed,and the Hargreaves model was revised.It was found that the daily ET0 calculat-ed with the Hargreaves model was below that of the Penman-Monteith model.The bias error (BE)and mean bias error (MBE)were 0.539 mm and 20.98%,respectively.The correlation coefficient increased from 0.494-0.874 to 0.863-0.985 after revision,and the BE and MBE were also significantly reduced,with the BE decreasing from 38.82 mm to 5.84 mm,and the MBE also decreasing from 36.79% to 7.76% of monthly ET0 .A non-parametric test indicated there was no significant difference between Penman-Monteith and Har-greaves models after revision of the latter.The revised Hargreaves model is sufficiently accurate to meet the re-quirements of research and practice,and has potential to be widely used,especially in areas where weather sta-tion data is relatively scarce,as is the case in many areas in China.关键词
内蒙古草原/Penman-Monteith 公式/Hargreaves 公式/参考作物蒸散量Key words
Inner Mongolia steppe/Penman-Monteith formula/Hargreaves formula/reference crop evapo-transpiration引用本文复制引用
孙小龙,武荣盛,李平,李丹..内蒙古不同类型草原区 Hargreaves 计算参考作物蒸散量的适用性分析[J].草业学报,2016,25(5):13-20,8.基金项目
国家重点基础研究发展计划（973计划）（2014CB138806），国家自然科学基金项目（71403272），内蒙古自治区自然科学基金项目（2014BS0709）和内蒙古自治区气象局科技创新项目（nmqxkjcx201406）资助。 （）
