This study was conducted to investigate the effect of different trickle irrigation regimes on seed cotton yield and water use factors under the semiarid region of western Turkey. The experiment was set up in Randomized Block Design with two factors and three replications during the years of 2002 and 2003. Trials, comprised of two irrigation intervals (once in IR4 and IR8 days) and three irrigation levels (100, 67, 33% of cumulative Class-A pan evaporation) were investigated. The highest irrigation water was applied to the full irrigation (IR4-100 and IR8-100) treatments for both irrigation intervals. Data obtained from the two year study showed that seed cotton yield was significantly (p<0.01) affected by irrigation intervals and irrigation levels treatments. The highest seed cotton yield was obtained from the 8-day irrigation interval (IR8-100) as averaging 5592 kg ha-1. WUE and IWUE values increased with decrease in irrigation water applied in both years. The highest WUE averaging 1.25 kg m-3 was obtained in IR4-33 treatment and minimum WUE averaging 0.82 kg m-3 was observed in IR4-100 treatment. In this study, averaging the yield response factor (ky) were determined as 0.56 during the entire growing season based on two irrigation intervals.
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Necdet Dagdelen, Ersel Yilmaz, Fuat Sezgin, Talih Gurbuz and Selin Akcay, 2005. Effects of Different Trickle Irrigation Regimes on Cotton (Gossypium hirsutum L.) Yield in Western Turkey. Pakistan Journal of Biological Sciences, 8: 1387-1391.
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