Akademik Veri Yönetim Sistemi
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, cilt.142, sa.9, 2016 (SCI-Expanded)
This study was carried out to determine the effect of regular deficit drip irrigation strategies on growth, yield, and yield components, as well as water use efficiency (WUE) under Mediterranean conditions. Peanut (Arachis hypogaea cv. NC-7) crops were grown in the seasons of 2013 and 2014. Irrigation water applications were 0 (I0), 25% (I25), 50% (I50), 75% (I75), 100% (I100), and 125% (I125) based on cumulative evaporation (Epan) measured in a Class A pan. Different irrigation levels applied have statistically significant effects on yield components such as plant height, primary branch length and number, dry shoot and root weight, number of pods, and 100-seed weight. In both years, water stress significantly decreased linoleic acid, protein, and oil content, although it increased oleic acid. The I100 irrigation treatment produced the highest protein value (32.5% in 2013 and 32.7% in 2014), whereas I0 yielded the lowest values (24.6% in 2013 and 25.9% in 2014). The maximum seed yield was obtained from I100 treatment in both years (5.25tha-1 in 2013 and 5.36tha-1 in 2014). Compared to I100, the two-year average seed yield reduction for I0, I25, I50, I75, and I125 were 81.0, 68.5, 28.5, 12.0, and 4.5%, respectively. The highest WUE was obtained from I50 and from I75 treatment in the first and second year, respectively, as much as 7.5kgha-1mm-1. Based on the combined effects of yield reduction, WUE, and seed quality characteristics, peanuts can be irrigated as much as 100% of pan evaporation when water shortage is not a concern, and it can be irrigated as much as 75% of pan evaporation under water shortage conditions.