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基于冠气温差的温室黄瓜蒸散量模拟

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通过建立基于不同时刻冠气温差(Tc-Ta)的温室黄瓜日蒸散量(ETc)估算模型，分析了基于不同时刻Tc-Ta 对估算ETc 的准确性;同时，基于Tc-Ta 构建了估算黄瓜不同生育期ETc 的Jackson模型，并将模型估算结果与基于冠层阻力参数(rc)的Penman-Monteith模型及蒸渗仪实测数据进行比较，结果显示，基于 14:00 的Tc-Ta构建的Jackson模型，估算温室黄瓜ETc 的精确度最高(R2 为 0。937)，误差最小(RMSE为 0。722 mm/d);相比 Penman-Monteith 模型(R2 为0。964)，基于Tc-Ta的Jackson经验模型对黄瓜ETc 估算结果与实测值相关性更高(R2 为0。967)，误差更小(RMSE为0。735 mm/d)。研究结果可为温室ETc 模拟以及节水灌溉智能决策提供科学依据。
Simulation of greenhouse cucumber evapotranspiration based on canopy-air temperature difference
The estimation models of daily evapotranspiration(ETc)of cucumber in greenhouse were established based on canopy-air temperature difference(Tc-Ta)at different times,and the accuracy of estimating of Tc-Ta at different times on ETc was analyzed.The Jackson model based on Tc-Ta was constructed according to the different growth stages of cucumber,and the estimated results of the model were compared with the Penman-Monteith model based on canopy resistance parameter(rc)and the measured data of evapotranspiration meter.The conclusions are found that the Jackson model construc-ted based on Tc-Ta at 14:00 shows the highest accuracy(R2 is 0.937)and the lowest error(RMSE is 0.722 mm/d)in estimating greenhouse cucumber ETc.Compared with the Penman-Monteith model(R2 is 0.964),the ETc estimation of Jackson empirical model based on Tc-Ta has a slightly higher cor-relation(R2 is 0.967)with the measured values and the deviation is smaller(RMSE is 0.735 mm/d).The results can provide a basis for simulating evapotranspiration of greenhouse crops and scientific de-cision-making of water-saving irrigation.

canopy-air temperature differencecanopy temperaturegreenhouse cucumberevapotranspirationJackson model

蒋建辉、闫浩芳、张川、王国庆、张建云、梁少威、邓帅帅

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江苏大学国家水泵及系统工程技术研究中心,江苏 镇江 212013

南京水利科学研究院水灾害防御全国重点实验室,江苏 南京 210029

江苏大学农业工程学院,江苏 镇江 212013

冠气温差 冠层温度 温室黄瓜 蒸散量 Jackson模型

国家重点研发计划(十四五)国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金水文水资源与水利工程国家重点实验室专项江苏省博士后研究项目江苏省农业装备与智能化高新技术重点实验室开放基金

2021YFC3201103418608635212100651509107516091032020nkzd01Bs510001JNZ201917

2024

10.3969/j.issn.1674-8530.23.0072

排灌机械工程学报
中国农业机械学会排灌机械分会,江苏大学流体机械工程技术研究中心

排灌机械工程学报

CSTPCD北大核心
影响因子：1.055
ISSN：1674-8530
年,卷(期)：2024.42(5)
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