144 The Effect of Water Stress on Growth of Several Warm-season Turfgrass Species

in HortScience
Authors:
Edward W. BushLouisiana State University Agricultural Center, Department of Horticulture, 137 J. C. Miller Hall, Baton Rouge, LA 70803

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James N. McCrimmonLouisiana State University Agricultural Center, Department of Horticulture, 137 J. C. Miller Hall, Baton Rouge, LA 70803

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Allen D. OwingsLouisiana State University Agricultural Center, Department of Horticulture, 137 J. C. Miller Hall, Baton Rouge, LA 70803

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Four warm-season grass species [common carpetgrass (Axonopus affinis Chase), common bermudagrass (Cynodon dactylon [L.] Pers.), St. Augustinegrass (Stenophrum secondatum Walt. Kuntze.), and zoysiagrass (Zoysia japonica Steud.)] were established in containers filled with an Olivia silt loam soil for 12 weeks. Grasses were maintained weekly at 5 cm prior to the start of the experiment. Water stress treatments consisted of a control (field capacity), waterlogged, and flooded treatments. Waterlogging and flood treatments were imposed for a period of 90 days. The effects of water stress was dependent on grass species. Bermudagrass vegetative growth and turf quality were significantly reduced when flooded. Carpetgrass, St. Augustingrass, and zoysiagrass quality and vegetative growth were also reduced by flooding. St. Augustinegrass and zoysiagrass root dry weight was significantly decreased. Zoysiagrass plants did not survive 90 days of flooding. Leaf tissue analysis for common carpetgrass, common bermudagrass, St. Augustinegrass, and zoysiagrass indicated that plants subjected to waterlogging and flooding had significantly elevated Zn concentrations.

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