@article{article_427115, title={Equations Developed to Estimate Evapotranspiration in Greenhouses}, journal={Yuzuncu Yıl University Journal of Agricultural Sciences}, volume={28}, pages={482–489}, year={2018}, DOI={10.29133/yyutbd.427115}, author={Karaca, Cihan and Tezcan, Ahmet and Büyüktaş, Kenan and Büyüktaş, Dursun and Baştuğ, Ruhi}, keywords={Aerodynamic resistance,Climate data,Crop evapotranspiration,Reference evapotranspiration,Vapor pressure deficit}, abstract={<p class="MsoNormal" style="margin-bottom:.0001pt;text-align:justify;line-height:200%;"> <span lang="en-us" style="font-size:10pt;line-height:115%;font-family:’Times New Roman’, serif;background:#FEFFFE;" xml:lang="en-us">It is estimated that the world population will be 9.6 billion by 2050.
In order to meet the food needs of the growing population, it is necessary to
increase the yield obtained from existing agricultural land. As the greenhouse
provides a more controlled environment, the yield taken from the unit area is
higher than the field conditions. For this reason, the greenhouse cultivation
has been increased in year by year. Irrigation is one of the major cultural
applications for increasing yield from the unit area. It is important that crop
water requirement should be determined correctly for proper irrigation
scheduling in greenhouse. The use of equations based on climate to determine
evapotranspiration has been increased in recent years. In this study, estimation
performances of evapotranspiration equations based on the reference crop
(Penman, Hargreaves, FAO-24-Radiation, Priestley-Taylor, FAO-Penman Monteith,
FAO24-Pan Evaporation) and main crop (Stanghellini, Fynn, Takakura, Simplified
Model) developed from the past to the present day were reviewed. It is
concluded that there is no standard equation under greenhouse conditions to
determine evapotranspiration of a specific crop. The reason for this is that
greenhouse climate changes depending on greenhouse type, location, direction,
cover material, greenhouse volume, ventilation mechanism, usage of thermal
curtain and shadow powder and even cultural applications such as hanging.
However, it is possible to develop new equation or calibrate existing equations
for each different greenhouse in the same region. Therefore, it is suggested
that evapotranspiration equations to be used should be selected depending on
the type of greenhouses commonly used in the region and, if necessary, modified
according to these conditions. </span> <br /> </p> <p> </p>}, number={4}, publisher={Van Yuzuncu Yıl University}