参考作物蒸散量的变化特征研究  

ET_0 variation characteristics in Xining of Qinghai

作　　者：孙凡[1] 任燕[1] 许传朝[1] 

机构地区：[1]青海大学水利水电学院,青海西宁810016

出　　处：《青海大学学报（自然科学版）》2013年第4期1-4,共4页Journal of Qinghai University(Natural Science)

摘　　要：为了分析西宁参考作物蒸散量(ET0)的变化特征,采用Penman-Monteith(P-M)公式,计算年及四季的ET0值并进行了影响因素分析。结果表明,西宁地区ET0的年际、年内变化呈下降趋势,且趋势显著;ET0年内分布为6月份达到最大值,12月份达到最小值;西宁地区的ET0与平均温度、风速、日照时数呈显著正相关,与降水和相对湿度成显著负相关。这说明ET0值受各种因素的综合影响。To analyze the variation characteristics of reference evapotranspiration(ET0) in Xining,the annual and four seasons ET0 values were calculated with Penman-Monteith(PM) equationk,and influencing factors were analyzed.The results show that inter-annual and annual changes of ET0 in Xining present downward trend ET0 reaches the maximum in June and minimum in December.ET0 in Xining area are significant positive correlation with and average temperature,wind speed and sunshine hours and negative with precipitation and relative humidity.This illustrates the ET0 is affected by a combination of factors.

关 键 词：西宁地区 参考作物蒸散量 P-M公式 

分 类 号：S311[农业科学—作物栽培与耕作技术]