Full TGIF Record # 123819
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Web URL(s):http://turf.rutgers.edu/research/abstracts/symposium2007.pdf#page=51
    Last checked: 11/28/2007
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Park, Bradley S.; Murphy, James A.; Lawson, T. J.; Samaranayake, Hiranthi; Devaney, James; Cashel, Robert; Campbell, Vincent
Author Affiliation:Department of Plant Biology and Pathology, New Jersey Agricultural Experiment Station, Rutgers University
Title:Recovery of Kentucky bluegrass subjected to seasonal application of simulated wear
Section:Poster presentations
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Meeting Info.:Cook College, Rutgers, NJ: January 11-12, 2007
Source:Proceedings of the Sixteenth Annual Rutgers Turfgrass Symposium. Vol. 16, 2007, p. 50-51.
Publishing Information:New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey
# of Pages:2
Keywords:TIC Keywords: Poa pratensis; Traffic simulation; Plant recovery; Variety trials
Abstract/Contents:"Kentucky bluegrass (Poa pratensis L.) is often established on highly used sports fields and individual cultivars may differ greatly in response to traffic. Many better performing Kentucky bluegrass cultivars tested under traffic during summer months have long winter dormacy period. Thus, evaluation of cultivar performance under traffic during spring and fall is also needed since these are the seasons when the majority of traffic (i.e., soccer, football, and lacrosse) occurs on sports fields. Cultivars of Kentucky bluegrass were seeded in 2002 on a Nixon sandy loam and a study was initiated in the spring of 2004 with the objective of determining seasonal wear tolerance and recovery among Kentucky bluegrass cultivars. The experimental design was a split-plot with three replications. The whole (main) plots were the season of traffic (none, spring, summer, fall); subplots were the cultivars. Wear was apploed to Kentucky bluegrass cultivars using a modified Sweepster in 2004 and 2005. Sixteen passes of a wear stimulator were applied per week over a six-week period (96 total passes) for each season (spring [April-May], summer [July-August], and fall [October-November]). Fullness of turf cover was visually rated on a 0-100% scale (0% = complete defoliation of turfgrass cover; 100% = full turfgrass canopy) to assess wear tolerance and recovery throughout the test period. Analysis of recovery data was performed for rating dates where the mean fullness of cover for 24 individual cultivars subjected to wear was approximately 33% and 66%. At the 33% mean recovery level, 'Julia' had the greatest fullness of cover compared to all other cultivars after spring 2004, summer 2004, and spring 2005 wear applications. Also, at the 33% mean recovery level, Julia was within the top statistical grouping of cultivars after wear in fall 2004 (including 'Moonshadow', 'Cabernet', and 'Lakeshore'), summer 2005 (including Cabernet), and fall 2005 (including 'Jefferson' and 'Limousine'). At the 66% mean recovery level, Julia had the greatest fullness of cover compared to all other cultivars after spring 2005 and was within the top statistical grouping of cultivars after wear in spring 2004, fall 2004, and summer 2005. Limousine had the greatest fullness of cover compared to all other cultivars at the 66% mean recovery level after wear in fall 2005. Several cultivars had very slow recovery after spring-, summer-, and fall-applied wear. At the 33% mean recovery level, 'Bedazzled', 'Langara', and 'Touchdown' were in the lowest statistical grouping for fullness of cover after all wear applications in 2004 and 2005. Similarly, Langara, Touchdown, 'Moonlight' and PST-161 had the lowest fullness of cover after spring and fall wear in 2004 at the 66% mean recovery level. Moonlight and Bedazzled were within the lowest statistical group for fullness of cover after spring, summer, and fall wear in 2005. Previously reported data from this research indicated Julia has excellent wear tolerance. Thus, it is probable that the excellent recovery of Julia was related to the reduced level of damage from wear. The excellent performance of Julia under wear stress indicates this cultivar should be evaluated for possible mechanisms associated with wear tolerance and recovery. Unfortunately, the relatively high suspectibility of Julia to disease prevents this cultivar from being recommended in Kentucky bluegrass blends for sports fields. The cultivar Limousine had moderate to good wear tolerance and recovery in this study. Midnight II, Midnight, and Liberator had good recovery after summer wear but were among the slowest to recover after spring and fall wear. 'Brooklawn', 'Coventry', and A96-1201 had good recovery after spring wear but recovery was poor after summer and fall wear. Touchdown, Langara, and Bedazzled consistently had the poorest recovery in each season of both years. These seasonal differences among cultivars are important particularly for the Midnight type cultivars which are commonly used for sports field receiving use in fall and spring. The poor response of Touchdown to wear and subsequent recovery was notable since this cultivar has been commonly recommended for use on sports fields. Thus, the data indicates cultivar performance under wear will vary based on the season during which the wear occurred. However, there was evidence that cultivars possessing good tolerance and recovery from wear regardless of the season can be developed."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Park, B. S., J. A. Murphy, T. J. Lawson, H. Samaranayake, J. Devaney, R. Cashel, et al. 2007. Recovery of Kentucky bluegrass subjected to seasonal application of simulated wear. Proc. Annu. Rutgers Turfgrass Symp. 16:p. 50-51.
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http://turf.rutgers.edu/research/abstracts/symposium2007.pdf#page=51
    Last checked: 11/28/2007
    Requires: PDF Reader
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