Michael D. Dukes, Ph.D., P.E. Agricultural & Biological Engineering Institute of Food and Agricultural Sciences (IFAS)‏ Landscape Fundamentals IST Wimauma,

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Presentation transcript:

Michael D. Dukes, Ph.D., P.E. Agricultural & Biological Engineering Institute of Food and Agricultural Sciences (IFAS)‏ Landscape Fundamentals IST Wimauma, FL, Feb 10, 2009 Florida Landscape Irrigation Water Requirements

© University of Florida Plant vs. Irrigation Water Requirement Plant water requirement is the total water (rain+irrigation) required by the plants Irrigation water requirement includes some estimate of rainfall for plant water needs Both concepts infer well-watered (i.e. non- stressed) conditions

© University of Florida Turfgrass Plant Water Requirements St. Augustine & bermudagrass, 43 inches/yr, S. Florida (Stewart and Mills, 1967) Bahiagrass, 33 inches/yr, N. Florida (Jia et al., 2007)

© University of Florida

Timing is Everything!

© University of Florida Turfgrass Plant Water Requirements St. Augustine & bermudagrass, 43 inches/yr, S. Florida (Stewart and Mills, 1967) Bahiagrass, 33 inches/yr, N. Florida (Jia et al., 2007) SWFWMD landscape coefficient for permitting study: similar water use for St. Augustine, Zoysia, and bahiagrass in first half year

© University of Florida Turfgrass Irrigation Water Requirements - Range Cardenas-Lailhacar (2008), no irrigation required on bermudagrass Davis (2008), reduced time schedule, 2 d/wk irrigation of ~22.5 inches/yr resulted in acceptable turf quality in a year with frequent dry periods ( )

© University of Florida Turfgrass Irrigation Water Requirements – Days of the Week Shedd et al. (2008) showed that 1 d/wk irrigation on established St. Augustinegrass resulted in poor or reduced turfgrass quality during drought (spring 06 & 07) Peacock and Dudeck (1984) reported good St. Augustinegrass quality for irrigation every 6 days

© University of Florida References Stewart, E. H., and Mills, W. C. (1967). "Effect of Depth to Water Table and Plant Density on Evapotranspiration Rate in Southern Florida." Transactions of the ASAE, 10(6), Jia, X., Dukes, M. D., Jacobs, J. M. (2007). "Development of bahiagrass crop coefficient in a humid climate." Proc., International Meeting of the American Society of Agricultural and Biological Engineers, American Society of Agricultural and Biological Engineers, Minneapolis, MN, ASABE Paper No Cardenas-Lailhacar, B., M.D. Dukes, and G.L. Miller Sensor-based automation of irrigation on bermudagrass during wet weather conditions. J. Irrig. & Drainage Eng. 134(2): Davis, S Evapotranspiration-based irrigation controllers under dry conditions in Florida. ME Thesis. Shedd, M., M.D. Dukes, and G.L. Miller Effect of irrigation control on turfgrass quality and root growth. Florida State Horticultural Society Proceedings. In press. Peacock, C.H. and A.E. Dudeck Physiological response of St. Augustinegrass to irrigation scheduling. Agronomy Journal 76: