Abstract
Drought is a major factor limiting the growth of turfgrasses. It has become a problem for turf management, as water availability for irrigation in urban areas is declining. Finding drought-resistance turfgrasses will facilitate turf management for areas with limited water. This study was conducted to determine the morphological and physiological responses of five kentucky blue grass cultivars to drought stress. Treated cultivars were Nutop, Merion, Georgeawn, 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, RWC, shoot lengths, shoot and root dry weights and number of days to complete leaf wilting, but increased EL and number of days to complete percent canopy green cover 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. Among five cultivars Nutop was the most and Georgetown was the least severely affected by drought stress.
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