Evaluation of Several Reference Evapotranspiration Models and Determination of Crop Water Requirement for Tomato in a Solar Greenhouse
Evaluation of Several Reference Evapotranspiration Models and Determination of Crop Water Requirement for Tomato in a Solar Greenhouse
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几种参考蒸散量模型的评估和日光温室番茄作物需水量的确定
DOI：
10.21273/hortsci14514-19
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发表时间：
2020-02-01
期刊：
影响因子：
1.9
通讯作者：
Ge, Jiankun
中科院分区：
文献类型：
--
作者：
Gong, Xuewen;Wang, Shunsheng;Ge, Jiankun
温室双作物系数法的研究需要参考蒸散量（ETo）的准确值。本研究于2015年和2016年在中国农业科学院实验站的日光温室中进行。在同一温室的中心安装了一个自动气象站，每隔30分钟记录一次天气参数。五个ETO模型（Penman-Monteith，Penman，辐射，蒸发皿蒸发，和Priestley-Taylor），并使用双作物系数法评估其性能。基础作物系数Kcb和土壤蒸发系数Ke根据温室内的环境气候进行调整。2015年和2016年分别采用液流系统和微型蒸渗仪连续测定作物蒸散量（ETc）。从五个模型中模拟每日ETO，并与测量值进行比较。结果显示，调整后的Kcb值在2015年为0.15，0.94和0.65，在2016年为0.15，1.02和0.70，分别在初始，中期和后期。在整个生长期内，Ke在0.10和0.45之间变化。日光温室滴灌番茄全生育期ETc为345 mm。辐射和蒸发皿蒸发模型往往高估ETo值。Penman-Monteith模型、Penman模型和Priestley-Taylor模型的结果表明，它们在估计ETO方面表现出相对较好的性能。考虑到Priestley-Taylor模型的稳健性和简单性，推荐Priestley-Taylor模型作为日光温室番茄ETo估算的首选模型。该研究可为北方日光温室蔬菜的灌溉制度优化提供参考。
Studies on dual crop coefficient method in a greenhouse require accurate values of reference evapotranspiration (ETo). This study was conducted in a solar greenhouse at the experimental station of the Chinese Academy of Agricultural Sciences during 2015 and 2016. An automatic weather station was installed in the center of the same greenhouse to record weather parameters at 30-minute intervals. Five ETo models (Penman-Monteith, Penman, radiation, pan evaporation, and Priestley-Taylor) were employed, and their performance was evaluated using the dual crop coefficient method. The basal crop coefficient Kcb and soil evaporation coefficient Ke were adjusted according to the surrounding climate inside the greenhouse. Crop evapotranspiration (ETc) was continuously measured using sap flow system combined with microlysimeter in 2015 and weighing lysimeters in 2016. Daily ETo was simulated from the five models and compared with the measurements. Results show that the adjusted Kcb values were 0.15, 0.94, and 0.65 in 2015 and 0.15, 1.02, and 0.70 in 2016 at initial, midseason, and late-season, respectively. The Ke varies between 0.10 and 0.45 during the whole growth period. The ETc was ≈345 mm for drip-irrigated tomato in solar greenhouse at the whole growth stage. The radiation and pan evaporation models tend to overestimate ETo values. Results of the Penman-Monteith, Penman, and Priestley-Taylor models show comparatively good performance in estimating ETo. Considering the robustness and simplicity, the Priestley-Taylor was recommended as the first choice to estimate ETo of tomato grown in a solar greenhouse. This work can help farmers to optimize the irrigation scheduling based on an ETo model for solar greenhouse vegetables in northern China.