Performance of Three Warm Season Turfgrasses under Linear Gradient Irrigation

  • Ow, Lai Fern (Centre for Urban Greenery and Ecology, National Park Board, Singapore Botanic Gardens) ;
  • Ghosh, Subhadip (Centre for Urban Greenery and Ecology, National Park Board, Singapore Botanic Gardens)
  • Received : 2016.10.17
  • Accepted : 2017.03.10
  • Published : 2017.04.03


The appropriate level of irrigation for turfgrasses is vital to the performance of the turfgrass as well as conservation of water. Linear gradient irrigation system (LGIS) facilitates long-term study of turf performance under continuous irrigation gradients at extreme ends of the irrigation scale. The objectives of this study were to: a) determine the minimum irrigation requirements and relative drought resistance in three warm season turfgrasses; and b) evaluate the medium to long-term effects of irrigation levels on turf persistence, weed invasion, and susceptibility to diseases. Results suggest that grasses differed in drought resistance and persistence under variable irrigation regimes. Irrigation (Ep) required for consistent acceptable turf quality for respective grasses was Cynodon dactylon x C. transvaalensis (61%), Zoysia matrella L. Merr (73%), and Stenotaphrum secundatum 'Palmetto' (86%). Brown patch infection was most prevalent in Stenotaphrum secundatum 'Palmetto' at 12 and 125% Ep irrigation. Cynodon dactylon x C. transvaalensis and Zoysia matrella L. Merr were better able to adapt to the various irrigation regimes, and this ability allowed these species to resist drought, and maintain turf coverage which in turn, kept weeds and the occurrence of diseases at bay. Ranking these grasses for their drought tolerance abilities showed that Cynodon dactylon x C. transvaalensis had the most outstanding resistance against drought, followed by Zoysia matrella L. Merr, and lastly, Stenotaphrum secundatum 'Palmetto'. Despite having the highest irrigation requirement, Stenotaphrum secundatum 'Palmetto' was still not able to maintain persistence at high irrigation regimes. Likewise, this grass also lost turf coverage at low irrigation levels.


  1. Barton, L. and Colmer, T.D. 2006. Irrigation and fertiliser strategies for minimising nitrogen leaching from turfgrass. Agri. Water Mgmt. 80:160-175.
  2. Carrow, R.N. 1995. Drought resistance aspects of turfgrasses in the southeast-evapotranspiration and crop coefficients. Crop Sci. 35:1685-1690.
  3. Carrow, R.N. 1996. Drought resistance aspects of turfgrasses in the southeast: Root-shoot responses. Crop Sci. 36:687-694.
  4. Cathey, S.E., Kruse, J.K., Sinclair, T.R. and Dukes, M.D. 2013. Transpiration and visual appearance of warm season turfgrasses during soil drying. Environ. Exp. Bot. 89:36-43.
  5. Fu, J.M., Fry, J. and Huang, B.R. 2004. Minimum water requirements of four turfgrasses in the transition zone. HortSci. 39:1740-1744.
  6. Hanks, R.J., Keller, J., Rasmussen, V.P. and Wilson, G.D. 1976. Line source sprinkler for continues variable irrigation crop production studies. Soil Sci. Soc. Amer. Proc. 40:426-429.
  7. Horst, G.L., O'Toole, J.C. and Faver, K.L. 1989. Seasonal and species variation in baseline functions for determining crop water stress indices in turfgrass. Crop Sci. 29:1227-1232.
  8. Huang, B., Duncan, R.R. and Carrow, R.N. 1997. Drought-resistance mechanisms of seven warm season turfgrasses under surface soil drying: II. Root aspects. Crop Sci. 37:1863-1869.
  9. Huang, B. 2008. Mechanisms and strategies for improving drought resistance in turfgrass. Acta Horti. 783:221-227.
  10. Jing, H., Fry, J.D. and Tisserat, N. 1998. Assessing irrigation management for its effects on disease and weed levels in perennial ryegrass. Crop Sci. 38:440-445.
  11. Meyer, J.L and Gibeault, V.A. 1986. Turfgrass performance under reduced irrigation. Calif. Agr. 40(7/8):19-20.
  12. Morris, K.N. and Shearman, R.C. 2007. NTEP turfgrass evaluation guidelines [Online: ].
  13. Peacock, C.H. 2001. Irrigation requirement for turf establishment under supra optimal temperature conditions. Int. Turfgrass Soc. Res. Jour. 9:900-905.
  14. Qian, Y.L. and Engelke, M.C. 1999. Performance of five turfgrasses under linear gradient irrigation. HortSci. 34:893-896.
  15. Sifers, S.I., Beard, J.B. and Hall, M.H. 1990. Comparative dehydration avoidance and drought resistance among major warm-season turfgrass species and cultivars. Texas Turfgrass Research-1990. PR-4738-4768. Texas Agr. Expt. Sta. Publ., College Stn.
  16. Songul, S., Mutlu, N., Gurbuz, E., Osman, G., Murat, H., et al. 2011. Drought Resistance of Warm-season Turfgrasses Grown in Mediterranean Region of Turkey. HortTech. 21(6):726-736.
  17. Zhang, J., Unruh, B. and Kenworthy, K.E. 2013. Zoysia grass cultivar responses under Linear Gradient Irrigation System. Int. Turfgrass Soc. Res. Jour. 12:179-185.
  18. Zhang, J. and Unruh, B. 2015. Turf Performance of Bahia grass, Centipede grass, and St. Augustine grass Cultivars under a Linear Gradient Irrigation System. HortSci. 50(3):491-495.