人工草地ET_0算法的适用性分析及ET_c影响因子研究  

Application of ET_0 Algorithm Analysis and Impact Factor of ET_c of Artificial Grassland

作　　者：姜梦琪[1] 郭克贞[2] 吕志远[1] 苏佩凤[2] 邬佳宾[2] 彭龙[1] 徐冰[2] 张娜[1] 

机构地区：[1]内蒙古农业大学,呼和浩特010018 [2]水利部牧区水利科学研究所,呼和浩特010020

出　　处：《灌溉排水学报》2016年第8期69-72,共4页Journal of Irrigation and Drainage

基　　金：内蒙古科技创新引导奖励项目(nsk2012);内蒙古水利科技项目(nsk2012-15)

摘　　要：收集24 a鄂尔多斯乌审旗气象资料,以PM为标准,对比分析了Hargreaves和Priestley-Taylor两种方法在鄂尔多斯地区的潜在腾发量计算精度,并对二者的适用性进行评价。结果表明,Hargreaves的计算精度比PriestleyTaylor高,与PM相比,Hargreaves和Priestley-Taylor方法的24 a平均年绝对差分别是5.247 7和-26.853 4,相对差分别是0.646 6%和-3.308 6%,因此Hargreaves比Priestley-Taylor更适用于乌审旗地区。应用"草地腾散力自动测试系统"对乌审旗紫花苜蓿草地实际腾发量和近地层环境因子进行了观测,并进行了经线性回归分析。Meteorological data of wushen banner of ordos city for 24 years was collected, using PM method as standard, to analyze calculation accuracy of potential evapotranspiration by Hargreaves and Priestley- Taylor cal- culation method separately in ordos region. The results showed that the accuracy of Hargreaves＇ s calculation was higher than that of Priestley-Taylor, compared with the PM method, the average absolute difference and the rela- tive difference of Hargreaves were 5.247 7 and 0.646 6%, which were 26.853 4 and 3.308 6% for Priestley Tay- lor. So the method of Hargreaves was more suitable for wushen banner area than Priestley-Taylor. The actual evaporation and environment factors of surface layer were observed by ENVI data grass evapotranspiration auto- matic measurement system of purple flower clover in Wushen＇banner, and were analyzed by linear regression.

关 键 词：潜在腾发量 计算方法 Hargreaves公式 Priestley—Taylor公式 环境因子 

分 类 号：S812[农业科学—草业科学]