Browsing by Author "Etemadi, Nematollah"

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    Evaluation of drought tolerance in some kentucky bluegrass (Poa pratensis) cultivars
    (Uludağ Üniversitesi, 2015-10-08) Sadeghi, Leila; Arab, Mostafa; Etemadi, Nematollah; Yazdani, Navid
    Drought stress is a major factor limiting the growth of turfgrasses and it has become a problem for turf management, as water availability for irrigation in urban areas is declining. Finding drought-tolerant turfgrasses will facilitate turf management for areas with limited water. This study was conducted to determine the morphological and physiological responses of five Kentucky bluegrass cultivars to drought stress. Treated cultivars were ‘Nutop’, ‘Merion’, ‘Georgetown’, ‘Crusade’ and ‘Barcelona’. A split-split design based on the completely randomized block in three replications was considered. Treatments were irrigated after 30, 50, 70, 90, 110, and 130 millimeter evaporation from class A pan. Drought stresses significantly reduced turf quality, relative water content (RWC), shoot lengths, shoot and root dry weights and number of days to complete leaf wilting, but increased electrolyte leakage (EL) and number of days to recover complete green canopy after re-watering. Under drought stress, ‘Nutop’ had higher RWC, shoot dry and fresh weights and shoot lengths than other cultivars. ‘Merion’ had faster recovery from drought stress and higher root weight. Overall, among five cultivars, ‘Nutop’ and ‘Georgetown’ were least and most affected by drought stress, respectively.