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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=106
    Last checked: 08/01/2013
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Publication Type:
i
Report
Author(s):Hephner, A. J.; Henry, G. M.
Author Affiliation:Texas Tech University, Lubbock, TX
Title:Competition between khakiweed and bermudagrass under simulated compaction
Section:Posters
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Meeting Info.:Little Rock, Arkansas: January 25-27, 2010
Source:2010 Proceedings, Southern Weed Science Society. Vol. 63, 2010, p. 56.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Alternanthera pungens; Compaction; Cultivar evaluation; Cynodon dactylon x Cynodon transvaalensis; Soil salinity; Traffic simulation
Cultivar Names:TifSport
Abstract/Contents:"Khakiweed (Alternanthera pungens HBK.) is one of the most troublesome turfgrass weeds throughout the arid and semi-arid regions of the southern United States. Anecdotal evidence suggests that khakiweed prevalence has increased on golf courses, athletic fields, and home lawns due to tolerance of soil salinity, compaction, and traffic. Field experiments were conducted at the Quaker Research Farm in Lubbock, TX during the summer of 2009 to determine the competitive response of khakiweed to increasing levels of simulated compaction. Cup cuttings (10.2 cm) of khakiweed were removed from naturally occurring populations located in the rough of Meadowbrook Golf Course in Lubbock, TX. Cores were transplanted on June 12, 2009 into 'Tifsport' bermudagrass cut to 1.3 cm. Six cores were transplanted (18.3 cm apart) down the center of each plot measuring 1.5 x 3.0 m. Plots were arranged in a randomized complete block design with four replications of treatments. Fertilizer (16N-10.5P-9.9K) was applied at the time of transplant at a rate of 24.4 kg N/ha and monthly thereafter for the duration of the trial. Plants were watered daily with an automated irrigation system calibrated to deliver 5.0 cm/week. Cores were allowed to acclimate for 2 weeks to encourage rooting prior to the initiation of the trial. Compaction treatments were applied using a Brouwer Tr 224 Turf Roller and were initiated on June 26, 2009. Treatments consisted of no compaction, 3,173 N (4 passes), 3,173 N (8 passes), and 3,173 N (12 passes). Plant diameter measurements were recorded bi-monthly for the duration of the trial. Two diameter measurements were taken perpendicular to each other (the first measurement was taken in the largest diameter) and averaged to obtain the reported diameter of a plant at each sampling time. Lowest order curves giving high R2 values were fit to the data for comparisons of plants subjected to different compaction treatments. Khakiweed plant diameters decreased as competition level increased 4 WAIT. Plants receiving no compaction exhibited diameters of 9.9 cm 4 WAIT. Plants receiving 3,173 N (4 and 8 passes) exhibited diameters of 8.4 cm, while plots subjected to 3,173 N (12 passes) had diameters of 7.0 cm 4 WAIT. Khakiweed plant diameter decreased 12 WAIT regardless of compaction treatment. Plants receiving no compaction exhibited diameters of 6.2 cm 12 WAIT. Plants receiving 3,173 N (4 and 8 passes) exhibited diameters of 5.0 cm, while plots subjected to 3,173 N (12 passes) had diameters of 3.7 cm 12 WAIT. Data suggest that khakiweed is tolerant to relatively high levels of compaction and may be competitive with bermudagrass under those conditions. This experiment will be replicated over time."
Language:English
References:0
Note:Reprint appears in Texas Tech University: Turfgrass Science Webpage, [2011], p. [1]
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hephner, A. J., and G. M. Henry. 2010. Competition between khakiweed and bermudagrass under simulated compaction. South. Weed Sci. Soc. Proc. 63:p. 56.
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http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=106
    Last checked: 08/01/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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