TAILIEUCHUNG - Effect of irrigation regimes on carbon isotope discrimination, yield and irrigation water productivity of wheat
The present research study was carried out during the years 2009–2010 and 2010–2011 to identify the relationship between carbon isotope discrimination (∆) of grain and leaf, yield of winter wheat, and irrigation water productivity (IWP) under different water conditions in a semiarid climate. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2017) 41: 50-58 © TÜBİTAK doi: Research Article Effect of irrigation regimes on carbon isotope discrimination, yield and irrigation water productivity of wheat 1, 2 2 2 3 4 4 Sema KALE *, Bülent SÖNMEZ , Sevinç MADENOĞLU , Kadri AVAĞ , Ufuk TÜRKER , Gökhan ÇAYCI , Ali Cihat KÜTÜK 1 Department of Irrigation, Faculty of Agriculture, Süleyman Demirel University, Isparta, Turkey 2 Soil, Fertilizer and Water Resources Central Research Institute, Ankara, Turkey 3 Department of Agricultural Machinery, Faculty of Agriculture, Ankara University, Ankara, Turkey 4 Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Ankara University, Ankara, Turkey Received: Accepted/Published Online: Final Version: Abstract: The present research study was carried out during the years 2009–2010 and 2010–2011 to identify the relationship between carbon isotope discrimination (∆) of grain and leaf, yield of winter wheat, and irrigation water productivity (IWP) under different water conditions in a semiarid climate. The field experiments were conducted with four different irrigation treatments (I1: rainfed: I2: irrigate when calculated soil water depletion is 60 mm below field capacity (full irrigation); I3: two irrigations maximum, one at tillering and another at grain filling; I4: no irrigation after establishment until heading, after which irrigate when soil water depletion is 60 mm below field capacity). The leaf (∆L) and the grain (∆G) carbon isotope discriminations, biomass, and grain yield (GY) were measured in the experiments and the harvest index (HI) and IWP were calculated. At the end of the study, taking a 2-year average, GY and HI were found to be t ha–1, t ha–1, t ha–1, and t ha–1 and 29%, 31%, 31%, and 32%, respectively, according to the treatments. The results showed a .
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