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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=291
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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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, NC |
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| Title: | Use of GPS and controlled environment experiments to examine factors affecting paspalum species distribution |
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| Section: | Soil & environmental aspects
Other records with the "Soil & environmental aspects" Section
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| Meeting Info.: | San Antonio, Texas: January 23-25, 2006 |
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| Source: | Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 219. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Disease control; Distribution patterns; GPS; Geographical distribution; Paspalum; Paspalum dilatatum; Paspalum notatum; Weed control
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| Abstract/Contents: | "Dallisgrass (Paspalum dilatatum Poir.) and bahiagrass (Paspalum notatum Fluegge) are two of the most troublesome weed species in managed turfgrass. These rhizomatous, perennial grass species are known to affect appearance, texture, and playability of turf in home lawns, golf courses, and athletic fields. The severity and prevalence of these problem species, as well as the difficulty of achieving control with herbicide management alone, invite examination of their population ecology for clues to improved management tactics. The distribution of these species was evaluated in both fairways and roughs of three holes on two golf courses. Golf courses were selected based on the presence of both weed species. Individual plants were mapped using a high precision (RTK) GPS unit. The RTK unit was used to delineate between the rough and fairway height of cut as well as the elevation characteristics of each hole. Volumetric soil water content and soil penetration resistance readings were also obtained. Characteristics used for initial correlation analysis consisted of mowing height, elevation, volumetric soil water content (soil moisture), and soil penetration resistance (soil compaction). Categorical ranges were created for each landscape characteristic using Jenk's natural breaks method. Data was subjected to chi-square analysis in order to determine if the existing distribution of Paspalum spp. differed from a homogeneous distribution across all environmental factors. Bahiagrass growth and distribution was more affected by mowing height than dallisgrass. Bahiagrass was predominantly distributed in the rough, while dallisgrass occurred at both mowing heights. Although highly significant, data suggest that elevation was not a factor affecting Paspalum spp. distribution. Similar responses were observed for both species in regards to soil compaction. Higher plant density for both species was observed in moderately compacted soil (40-60 N). Bahiagrass distribution was not affected by soil moisture. Dallisgrass density was lower in areas with low volumetric soil moisture levels (< 27%). Controlled environment experiments were conducted to help clarify the effect of several of these factors and to negate the possibility of spatial autocorrelation. Research was conducted at the Sandhills Research Station in Jackson Springs, NC focusing on the effects of mowing height on the lateral spread and rhizome production of Paspalum spp. Dallisgrass spread and rhizome production was reduced when compared to the non-mowed check. However, the amount of reduction did not differ between mowing treatments. Bahiagrass plants that were mowed at the 1.3 cm (fairway) height had both spread and rhizome productions that were less than plants mowed at 7.6 cm (rough) height. This data supports our spatial distribution research concerned with mowing height. Therefore, areas that are maintained at a rough height may be more conducive to bahiagrass infestation than areas maintained at a fairway height. Greenhouse experiments were conducted to quantify the growth response of dallisgrass and bahiagrass to soil moisture using water table depth gradient tanks in a controlled environment. Lowest order curves giving high R2 values were fit to the preliminary 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. This data supports our spatial distribution research concerned with volumetric soil water content. Therefore, areas that have high volumetric soil water contents may be more conducive to dallisgrass infestation, while areas with low volumetric soil water contents may be more conducive to bahiagrass infestation." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Vision for the future"
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. Use of GPS and controlled environment experiments to examine factors affecting paspalum species distribution. South. Weed Sci. Soc. Proc. 59:p. 219. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=291
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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