Evapotranspiration Models in the Greenhouse Cultures: Data Analysis and Methods

Document Type : Review Article

Authors

• Omid Raja ¹
• Masoud Parsinejad ²
• Afshin Khorsand ¹
• Behdad Chehrenegar ³

¹ Researcher, Agricultural Engineering Research Institute (AERI), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran

² Professor, Department of Irrigation and Reclamation Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

³ Urmia Lake Research Program, Sharif University of Technology, Tehran, Iran

https://doi.org/10.22067/jwsd.v12i2.2502-1403

Abstract

The accurate estimation of evapotranspiration in greenhouses is crucial for the optimal utilization of water resources and accurate irrigation scheduling, leading to improved water use efficiency. Various experimental and physical models are commonly used to estimate evapotranspiration based on climate data. In this review, the relationship between greenhouse technology and reference models for estimating evapotranspiration (ET_o) or crop evapotranspiration estimation models (ET_c) was analysed. The classification of greenhouses, the equipment commonly used, and the data collected for ET_o and ET_c measurements were also analysed in this study. In general, this study aimed to evaluate, and summarise the currently available ET_o and ET_c models used in different greenhouse categories, and to assess the degree of accuracy of the widely used models in estimating ET_o and ET_c. The results showed that the FAO-56 Penman-Monteith equation performed best among all models and can be considered as the best method for estimating ET_o in low-tech plastic greenhouses that are widely used in Iran. If greenhouse ET_c models become more user-friendly and accessible, the likelihood or chance of rapid dissemination and adoption of advances in ET_c estimation technology by a larger community of greenhouse crop producers will increase. The overview presented in this study highlighted the relationship between greenhouse technology and ET_o and ET_c models. Studies have also shown that the knowledge and methods available in ET_c measurements can positively increase the sustainability of greenhouse agriculture.

Keywords

• Crop Evapotranspiration
• FAO-56 Penman–Monteith
• Reference Evapotranspiration
• Technology
• Water Requirement

Main Subjects

• Irrigation and Agriculture