称重式蒸渗仪实测值的温室番茄日腾发量估算方法

Estimation Method of Daily Evapotranspiration of Greenhouse Tomatoes from Measured Values by Weighing Osmometer

以称重式蒸渗仪实测的温室番茄日腾发量为标准值,对基于FAO-56 Penman-Moneith方程的简化P-M法(P-M_(s))、修正P-M法(P-M_(m))2种模型方法计算的温室番茄腾发量进行对比分析,评价2种方法在温室环境下的适用性。结果表明,时段内P-M_(s)模型计算温室番茄日均腾发量存在较大偏差,P-M_(m)模型方法计算得到的日均腾发量与实测值较接近,因此,在温室环境条件下应优先选P-M_(m)法,而P-M_(s)法计算结果误差较大,不建议直接在温室环境中应用。

With the daily evapotranspiration of greenhouse tomato measured by weighing transpiration meter as standard value,this paper compares and analyses the greenhouse tomato evaporation calculated by P-Ms and P-Mm two model methods based on FAO-56 Penman-Moneith equation,and evaluates the applicability of the two methods in greenhouse environment.The results showed that there was a large deviation between the calculated daily average evaporation of greenhouse tomatoes by P-Ms model and the measured values by P-Mm model.Therefore,P-Mm method should be preferred in greenhouse environment.P-Ms method has large error in calculation results and is not recommended to be directly applied in greenhouse environment.