摘要
以称重式蒸渗仪实测温室茄子日蒸散量为标准值,对基于FAO-56 P-M法(P-Ms)、修正P-M法(P-Mm)、Priestley-Taylor法(P-T)和Irmak-Allen法(I-A)4种模型方法计算的温室茄子日蒸散量进行对比分析,评价各方法在温室内的适用性。结果表明,利用4种模型方法计算得到的温室茄子日蒸散量与实测值(ETc)均具有相似的生育期变化规律,但各方法的计算精度差异明显。其中基于P-Mm法得到的ETc-m高估了32.1mm,而基于P-Ms、P-T和I-A法计算得到ETc-s、ETc-PT和ETc-IA则分别低估了132.3mm、80.0mm和53.5mm。ETc-m与实测值(ETc)的相关性最高,方程决定系数R2为0.905(P<0.01),一致性指数达0.944,RMSE仅为0.769mm·d^?1;而基于I-A法计算得到的ETc-IA与实测蒸散量的方程决定系数也较高(R^2=0.775),一致性指数为0.828。P-Ms和P-T法在温室内应用均有较大误差,其中,ETc-s和ETc-PT仅相当于实测值(ETc)的59.4%和74.8%,一致性指数分别为0.723和0.748,RMSE则分别达1.672mm·d^?1和1.304mm·d^?1。因此,计算温室作物蒸散量可优先选择P-Mm法,而在气象数据短缺时,I-A法可作为替代方法在温室内使用。
The daily evapotranspiration of greenhouse eggplant measured by weighing lysimeter was used as the standard value,four kinds of model methods,such as FAO-56 P-M method(P-Ms),modified P-M method(P-Mm),Priestley-Taylor method(P-T)and Irmak-Allen method(I-A)were applied to comparatively and analyze the daily evapotranspiration of greenhouse eggplant,and the applicability of each method in greenhouse was also evaluated.The results showed that the daily evapotranspiration of greenhouse eggplant that calculated by the four model methods had a similar variation rule with the measured value(ETc).However,the calculation accuracy of each method was obviously different.The ETc-m that calculated by P-Mm method was overestimated by 32.1mm,while the ETc-s,ETc-PT and ETc-IA that calculated by P-Ms,P-T and I-A methods were underestimated by 132.3mm,80.0mm and 53.5mm,respectively.ETc-m is much more correlated with ETc than others,and the equation coefficient R^2 was 0.905(P<0.01),the consistency index was 0.944,and RMSE was only 0.769mm·d^?1.The correlation of ETc-IA with ETc was better than ETc-s and ETc-PT,and the equation coefficient R^2 was 0.775(P<0.01),the consistency index was 0.828.Large errors were observed when methods P-Ms and P-T were applied in greenhouse,and the ETc-s and ETc-PT were only 59.4%and 74.8%of the measured value(ETc).Meanwhile,the consistency indexes were only 0.723 and 0.748,respectively,and RMSE were 1.672mm·d^?1 and 1.304mm·d^?1,respectively.Therefore,the P-Mm method could be preferred to calculate the evapotranspiration of greenhouse crops,while I-A method is an alternative method in greenhouse in the case of insufficient meteorological data.
作者
李银坤
郭文忠
韩雪
王利春
林森
赵倩
陈红
LI Yin-kun;GUO Wen-zhong;HAN Xue;WANG LI-chun;LIN Sen;ZHAO Qain;CHEN Hong(Beijing Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China;College of Horticulture,China Agricultural University,Beijing 100094;Key Laboratory of Urban Agriculture(North China),Ministry of Agriculture and Rural Affairs,Beijing 100097)
出处
《中国农业气象》
CSCD
北大核心
2020年第3期129-137,共9页
Chinese Journal of Agrometeorology
基金
国家重点研发计划(2017YFD0201503)
北京市农林科学院创新能力建设专项(KJCX20180705)
农业物联网技术北京市工程实验室(PT2019-21)。
关键词
称重式蒸渗仪
温室茄子
日蒸散量
环境因子
估算方法
Weighing lysimeter
Greenhouse eggplant
Daily evapotranspiration
Environmental factors
Estimation methods
