摘要
为了解不同作物蒸散量估算方法在淮北地区的适用性,利用新马桥实验站称重式蒸渗仪测定了2016-2017年冬小麦全生育期的实际蒸散值,结合Hargreaves-Samani(H-S)、FAO-56 PM、Turc、Makkind(Mak)、Priestley-Taylor(P-T)、Mcloud(Mcl)和DeBruin-Keijman(D-K)7个模型,分析了冬小麦田的蒸散特征,将蒸散的估算值(ET0)和实测值(ETC)进行了对比。结果表明,相对于ETC值,7个模型拟合得到的ET0的RMSE值为0.99~2.29 mm·d^-1,且H-S>FAO-56 PM>Turc>Mak>P-T>Mcl>D-K;ETC与ET0的相关系数为0.74~0.97,其中FAO-56 PM的相关性最高,P-T、Mak、D-K、H-S也表现出较好的相关性。综合来看,H-S法总体表现较好,更适合该地区。对6种主要气象要素与实测蒸散值进行主成分分析发现,温度是影响ETC的主要因子,湿度、日照时数和平均风速(2 m)对淮北冬小麦田蒸散值的影响不大;H-S模型以温度数据为基础,利用线性订正法和湿度指数项订正法将H-S模型本地化后检验发现,其优化结果良好,RMSE降低(0.68 mm·d^-1)。
The accurate estimation of reference crop evapotranspiration(ET0)is important for evaluating agricultural water use efficiency.In this paper,the evapotranspiration characteristics of winter wheat field were analyzed by using the measured evapotranspiration values determined by the weighing lysimeter measurements in Xinmaqiao experimental station during the whole growth period from 2016 to 2017.The estimated evapotranspiration values were compared with the measured values.Results showed that according to RMSE(range from 0.99 to 2.29 mm·d^-1),the models ranked as Hargreaves-Samani(H-S)>FAO-56 PM>Turc>Makkind(Mak)>Priestley-Taylor(P-T)>Mcloud(Mcl)>DeBruin-Keijman(D-K);according to correlation coefficient(0.74-0.97),the models ranked as:FAO-56 PM>P-T=Mak=D-K>H-S>Turc>Mcl;the deviation of H-S method is the smallest(RMSE is 0.99 mm·d^-1),and the correlation is good(r=0.95),which is more suitable for this climate region.Principal component analysis of different meteorological factors and measured evapotranspiration(ETC)showed that temperature was the main factor affecting ETC,while humidity had little effect on the evapotranspiration value of winter wheat field in Huaibei.Based on H-S model,the winter wheat evapotranspiration model with revised parameters was obtained.The optimization effect is good,and RMSE is reduced(0.68 mm·d^-1).
作者
姚瑶
唐婉莹
袁宏伟
蒋尚明
文想成
程钶强
李祥
杨书运
YAO Yao;TANG Wanying;YUAN Hongwei;JIANG Shangming;WEN Xiangcheng;CHENG Keqiang;LI Xiang;YANG Shuyun(Department of Resources and Environment,Anhui Agricultural University,Hefei,Anhui 230036,China;Meteorological Bureau of Changfeng County,Hefei City,Anhui Province,Hefei,Anhui 231100,China;Key Laboratory of Water Conservancy and Water Resources of Anhui Province,Water Resources Research Institute of Anhui Province and Huaihe River Commission,Ministry of Water Resources,Hefei,Anhui 230088,China)
出处
《麦类作物学报》
CAS
CSCD
北大核心
2020年第6期737-745,共9页
Journal of Triticeae Crops
基金
重点研发粮食丰产增效科技创新项目(2017YFD0301301)。
