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bluegrasses with the lowest water applications were also ranked among those with
the highest visual quality (Fig. 6; there
were no statistical differences among cultivars with average visual quality greater
than 5.5). The amount of water applied to
these 15 cultivars with superior turf quality
was also below the mean water applied to
all 30 bluegrasses (32.8 cm). Similarly, visual quality in 12 of the 15 bluegrasses that
received the least water was greater than
the mean of all 30 bluegrasses (5.78), although all 15 were statistically similar.
In contrast to the 15 top performers, six
cultivars were ranked within the group that
received the most water and had the lowest
visual quality (Fig. 6). Those six cultivars,
which included Kenblue, Wellington, Midnight II, Baron, Diva, and Shamrock, had
www.stma.org
neither the high visual quality nor low water
requirement traits we were screening for in
this study.
CONCLUSIONS
Cultivar selection in KBG had significant impacts on water requirements and
visual quality ratings. Among cultivars, differences in seasonal water applications were
as great as 21.6 cm and differences in days
to 50% wilt between irrigations were as
great as 6.7 days, nearly 1 week). Based on
statistical range tests, only 15 of the 30
cultivars were in the group that both received the least water and had the greatest
visual quality. Results indicated that, under
conditions similar to those in our study,
KBG in the Compact America and MidAtlantic phenotypic groups can be selected
for their lower irrigation requirements
without sacrificing visual quality, and types
from those two groups may represent the
best selections for breeding efforts to
achieve such goals.n
Dr. Dale J. Bremer is associate professor,
Dept. of Horticulture, Forestry and Recreation
Resources, Kansas State University; Dr. Jason
D. Lewis is assistant professor, Dept. of Horticulture & Crop Science, California Polytechnic
State University, San Luis Obispo. This article
was reprinted with permission from Sports Turf
Manager, Vol 26, No 1, Spring 2013.
This research was funded by United States
Golf Association, Turfgrass Producers International, and the Kansas Turfgrass Foundation.
The technical assistance of Tony Goldsby was
greatly appreciated.
SportsTurf 45
