Wednesday, November 7, 2007
268-8

Effect of Mowing Height and Traffic on Alternative Species for Golf Course Fairways.

Eric Watkins, Andrew Hollman, and Brian Horgan. Horticultural Science, University of Minnesota, 1970 Folwell Ave., St. Paul, MN 55108

As restrictions on water use, fertilization, and pesticide applications continue to increase, golf course superintendents will need to use species that require reduced inputs.  The objective of this study was to evaluate alternative grass species under low-input fairways conditions.  In September 2005, 17 species were established on native soil [Waukegan silt loam (fine-silty over sandy, mixed, mesic Typic Hapludoll)] in St. Paul, MN.  The experimental design was a multiple split plot with four replications.  Each species was evaluated at three levels of traffic (0, 3, and 6 passes per week using a drum-type wear machine) and two mowing heights (2.54 and 1.90 cm).  Species evaluated included creeping bentgrass (Agrostis palustris), colonial bentgrass (Agrostis tenuis), velvet bentgrass (Agrostis canina), redtop (Agrostis alba), Kentucky bluegrass (Poa pratensis), creeping bluegrass (Poa annua var. reptans), rough bluegrass (Poa trivialis), supina bluegrass (Poa supina), Canada bluegrass (Poa compressa), tall fescue (Festuca arundinacea), hard fescue (Festuca trachyphylla), Chewings fescue (Festuca rubra var. commutata), sheep fescue (Festuca ovina), perennial ryegrass (Lolium perenne), tufted hairgrass (Deschampsia cespitosa), alkaligrass (Puccinellia distans), and timothy (Phleum nodosum).  Velvet bentgrass, colonial bentgrass and supina bluegrass performed well under traffic at both mowing heights during year one.  In year two, the fine fescue species (hard fescue, Chewings fescue and sheep fescue) were the top-performing species regardless of treatment.   Differences in surface hardness and soil compaction will also be discussed.