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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2006.pdf#page=16
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Henry, G. M.;
Burton, M. G.;
Yelverton, F. H. |
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| Author Affiliation: | North Carolina State University, Raleigh, North Carolina |
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| Title: | Response of dallisgrass and bahiagrass along a soil moisture gradient |
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| Section: | Research posters
Other records with the "Research posters" Section
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| Meeting Info.: | Providence, RI: January 3-6, 2006 |
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| Source: | Proceedings: NortheasternWeed Science Society. Vol. 60, 2006, p. 11. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Paspalum dilatatum; Paspalum notatum; Soil moisture; Soil moisture sensors; Rhizomes; Competitive ability; Interactions
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| Abstract/Contents: | "Paspalum dilatatum Poir. (dallisgrass) and Paspalum notatum Fluegge (bahiagrass) are two of the most prevalent weed species in managed turfgrass. These rhizomatous, perennial grass species are known to affect appearance, texture, and playability of turfgrass in home lawns, athletic fields, and golf courses. They reportedly tolerate both droughty, sandy soils, and moist, clayey soils. Preliminary analysis of dallisgrass and bahiagrass spatial distribution showed strong correlations between volumetric soil moisture content and species presence. Techniques used to investigate the response of weed species to soil moisture based on frequency or volume-of-watering are often critized for problems associated with rooting volume and unnatural soil moisture profile and root distribution. Soil moisture gradient thanks 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 elevations are subjected to progressively lower soil moisture levels. Six soil moisture gradient tank were constructed. 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. Sand and sandy loam soils were tested. Dallisgrass and bahiagrass were tested individually and in competition with bermudagrass. Soil moisture levels were expressed as centimeters above the water table and were correlated to volumetric soil moisture in the top 50 cm using a thetaprobe. Percent survival, above ground biomass (g), and rhizome production (g) were obtained two months after initial treatment. Lowest order curves giving high R2 values were fit to the data for comparison of plants at different soil moisture levels. Bahiagrass growth and survival was less affected by soil moisture than dallisgrass. Bahiagrass survival was 100% regardless of simulated environmental conditions. Bahiagrass rhizome production increased as depth to water table increased when grown in sandy loam soil, but decreased or remained relatively constant when grown in sand. Dallisgrass survival decreased as depth to water table increased. This trend was more severe when grown in competition with bermudagrass. Dallisgrass rhizome production decreased as depth to water table increased in all simulated environments except when grown as a monoculture in sandy loam soil. Results suggest that it may be possible to disadvantage Paspalum sp.in competitive interactions with bermudagrass by altering soil moisture. Substrate selection during construction and aeration may help create a landscape that discourages Pasaplum sp. infestation." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Henry, G. M., M. G. Burton, and F. H. Yelverton. 2006. Response of dallisgrass and bahiagrass along a soil moisture gradient. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 60:p. 11. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2006.pdf#page=16
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 60 |
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