AUTHOR=Jo Won Jun , Kim Dong Sub , Sim Ha Seon , Ahn Su Ran , Lee Hye Jin , Moon Yu Hyun , Woo Ui Jeong , Kim Sung Kyeom 

TITLE=Estimation of Evapotranspiration and Water Requirements of Strawberry Plants in Greenhouses Using Environmental Data

JOURNAL=Frontiers in Sustainable Food Systems

VOLUME=5

YEAR=2021

URL=https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2021.684808

DOI=10.3389/fsufs.2021.684808

ISSN=2571-581X

ABSTRACT=<p>Farmers routinely determine irrigation requirements from visual observations and cultivation experience, but this can lead to under- or over-irrigation. To establish precise irrigation technology for strawberry cultivation, the average daily evapotranspiration and water requirements were estimated according to the environmental data: air temperature and humidity from the center of the greenhouses and solar radiation from outside greenhouses. Makkink FAO24 equations (temperature and cloudiness) were used to estimate the evapotranspiration and water requirements. The temperature equation showed higher correlation coefficients in solar radiation (<italic>R</italic><sup>2</sup> = 0.60), evapotranspiration (<italic>R</italic><sup>2</sup> = 0.76), and water requirements (<italic>R</italic><sup>2</sup> = 0.69) than other tested equations. The daily irrigation, calculated from the estimated evapotranspiration, was 3.8 tons/10a. It is possible to develop a precision irrigation system from estimated evapotranspiration during the winter cultivation of “Seolhyang” strawberries in South Korea.</p>