Variable impacts on growth of deficit irrigation on Cynodon dactylon (L.) Pers. × Cynodon transvaalensis Burtt Davy and Poa pratensis L

As average global temperatures rise, Cynodon dactylon (L.) Pers. × transvaalensis Burtt Davy (triploid interspecific hybrid bermudagrass; HBG) may be increasingly suited for traditionally cooler climates where Poa pratensis L. (Kentucky bluegrass; KB) is common. The objective of this study to evaluate growth two HBG cultivars (‘DT-1’ and ‘NorthBridge Turf Bermudagrass’) compared with KB in all combinations deficit, moderate, high irrigation. had significantly more shoot root biomass depth than KB, the latter having a higher ratio. Differing responses deficit irrigation were also observed between cultivars. When drought stressed, NorthBridge Bermudagrass seems send roots deeper into soil capture water stored there while DT-1 grows thicker masses at shorter maximize its ability near surface. These data provide direct comparison KB—quantifying response under when grown cool-season conditions. suggest that needs, especially regions increasing scarcity, will likely less as function extensive systems.