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- W3103443 abstract "Broad concerns over water shortages and drought where irrigated urban landscapes are common in high desert regions have focused attention on drought tolerance of turfgrass species. We investigated the physiological responses of Kentucky bluegrass (KBG) and tall fescue (TF) under a prolonged drought under high desert conditions. The experimental design was a split plot with three replicates. Two irrigation treatments as a whole plot—well-watered and no-water—were applied to subplots of ‘Midnight’ KBG and ‘Gazelle’ TF. Stomatal conductance (gs), canopy temperature, and predawn leaf water potential were measured over two seasons. KBG gs and leaf water potential decreased faster and to a greater extent than TF in response to soil drying, and KBG was in complete dormancy and brown within 5 weeks after cessation of irrigation. By contrast, TF maintained a green canopy throughout the drought periods. In the nowater plots, TF appeared to consume water from the deepest measured soil profiles (80 to 100 cm depth) while KBG used most of the water in the 50 to 60 cm depths. In late summer when watered for recovery, KBG plots were mostly green within 3 weeks after re-watering. The surface temperature of the well-watered plots was 6–13 °C cooler than the no-water plots and TF showed 5–7 °C lower temperature than KBG in no-water plots. TF is suitable for deep soil, exploiting a larger volume of water to avoid drought while 1 Reprinted from Leksungnoen, N., P.G. Johnson, and R.K. Kjelgren. 2012. Physiological responses of turfgrass species to drought stress under high desert conditions. HortScience 47(1):105–111. 24 KBG’s rapid drought avoidance would likely perform better in shallow landscape soils under drought." @default.
- W3103443 created "2016-06-24" @default.
- W3103443 creator A5077855708 @default.
- W3103443 date "2012-01-01" @default.
- W3103443 modified "2023-09-27" @default.
- W3103443 title "The relationship between salinity and drought tolerance in turfgrasses and woody species" @default.
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