tailieunhanh - Irrigation scheduling of grapefruit trees in a Mediterranean environment throughout evaluation of plant water status and evapotranspiration
In this study, 1 full irrigation regime (100% of crop evapotranspiration, I100) and 2 deficit irrigation regimes (70%, I70, and 50%, I50) were evaluated in a Rio Red grapefruit (Citrus paradisi Macfad. ‘Rio Red’) orchard in Adana, Turkey. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2014) 38: 908-915 © TÜBİTAK doi: Research Article Irrigation scheduling of grapefruit trees in a Mediterranean environment throughout evaluation of plant water status and evapotranspiration 1, 1 1 1 1 Mustafa ÜNLÜ *, Rıza KANBER , D. Levent KOÇ , Bülent ÖZEKİCİ , Uğur KEKEÇ , 1 1 1 2 3 4 Turgut YEŞİLOĞLU , İbrahim ORTAŞ , Filiz ÜNLÜ , Burçak KAPUR , Servet TEKİN , Jana KÄTHNER , 4 4 5 5 Robin GEBBERS , Manuela ZUDE , Aviva PEETERS , Alon BEN-GAL 1 Faculty of Agriculture, Çukurova University, Adana, Turkey 2 Faculty of Agriculture, Yüzüncü Yıl University, Van, Turkey 3 Faculty of Agriculture, Kahramanmaraş Sütçü İmam University, Kahramanmaraş, Turkey 4 Leibniz Institute for Agricultural Engineering, Potsdam, Germany 5 Agricultural Research Organization, Bet-Dagan, Israel Received: Accepted: Published Online: Printed: Abstract: In this study, 1 full irrigation regime (100% of crop evapotranspiration, I100) and 2 deficit irrigation regimes (70%, I70, and 50%, I50) were evaluated in a Rio Red grapefruit (Citrus paradisi Macfad. ‘Rio Red’) orchard in Adana, Turkey. Fruit yield, leaf water potential (LWP), and soil water depletion (SWD) were measured among trees from each treatment. Actual evapotranspiration was calculated in 3 ways, using 2 energy balance methods (eddy correlation and Bowen’s ratio) and water balance. Evapotranspiration rates of I70 and I50 treatments were 10% and 18% less than I100, respectively. Average irrigation amount for I50 was less than half of the average irrigation amount for I100. Considering that yield for the experimental treatments did not change statistically significantly, the I50 treatment provided about 50% more irrigation water savings than full irrigation conditions. Grapefruit tree LWP was highly correlated to soil water status and significantly .
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