Full TGIF Record # 225228
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=292
    Last checked: 07/18/2013
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Publication Type:
i
Report
Author(s):Henry, G. M.; Burton, M. G.; Yelverton, F. H.
Author Affiliation:North Carolina State University, Raleigh, NC
Title:Dallisgrass and bahiagrass response to soil moisture in a simulated turf environment
Section:Physiological & biological aspects
Other records with the "Physiological & biological aspects" Section
Meeting Info.:Charlotte, North Carolina: January 24-26, 2005
Source:Proceedings of the 58th Annual Meeting of the Southern Weed Science Society. Vol. 58, 2005, p. 213.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Evaluations; Paspalum dilatatum; Paspalum notatum; Physiological responses; Soil moisture
Abstract/Contents:"Paspalum dilatatum Poir. (dallisgrass) and Paspalum notatum Fluegge (bahiagrass) are rhizomatous, perennial grass species that reportedly tolerate both droughty, sandy soils and moist, clay soils. These reports are anecdotal and have never been investigated in controlled experiments. The objective of our research was to determine the effect of soil moisture on the vegetative characteristics of dallisgrass and bahiagrass when grown alone or in competition with bermudagrass in sand or sandy loam soils. Techniques used to investigate the response of weed species to soil moisture based on frequency or volume of watering are often criticized for problems associated with rooting volume and unnatural soil moisture profile and root distribution. Water table depth gradient tanks allow for natural capillary action (soil water) and surface irrigation to simulate rainfall. When filled with soil and regulated by an outfall, capillary rise keeps the low end of the tank near field capacity and plants growing along higher elevation are subjected to progressively lower soil moisture levels. Six water table depth gradient tanks were constructed and the experiment will be replicated over time. Each tank was steeply sloped and had a volume of nearly 4 m3. Rhizomes of each grass were planted perpendicular to the slope (moisture gradient) to allow examination of growth characteristics at several moisture levels. Surface irrigation was used during establishment and periodically throughout the experiment to prevent permanent wilting. Artificial lighting was used during winter months to supplement natural light and approximate summer light intensity and photoperiod. Sand or sandy loam soils were used. Dallisgrass and bahiagrass were tested individually and in competition with bermudagrass. Soil moisture levels were expressed as centimeters above the water table and ranged from 28 to 144 cm. Growth occurred more rapidly in the sandy loam soil irrespective of species composition. Establishment of both species was slower in the presence of bermudagrass. In general, survival of transplanted dallisgrass was lower than bahiagrass survival. Percent survival and weekly growth rates were taken between weeks 3 and 4 after the initiation of the experiment. Bahiagrass survival and growth was less affected by differences in soil moisture irrespective of soil type. Dallisgrass survival and growth decreased as depth to water table increased. Results suggest that it may be possible to disadvantage Paspalum spp. in competitive interactions with bermudagrass by altering soil moisture. Substrate selection during construction and aeration may help create a landscape that discourages Paspalum spp. Infestation."
Language:English
References:0
Note:"The changing world of weed science"
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Henry, G. M., M. G. Burton, and F. H. Yelverton. 2005. Dallisgrass and bahiagrass response to soil moisture in a simulated turf environment. South. Weed Sci. Soc. Proc. 58:p. 213.
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http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=292
    Last checked: 07/18/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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