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| Web URL(s): | https://scisoc.confex.com/crops/2015am/webprogram/Paper92332.html
Last checked: 11/18/2015 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Shaddox, Travis W.;
Unruh, J. Bryan;
Trenholm, Laurie E.;
McGroary, Pauric;
Cisar, John L. |
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| Author Affiliation: | Shaddox and Trenholm: University of Florida, Gainesville; Unruh: University of Florida, Jay; McGroary and Cisar: University of Florida, Ft. Lauderdale, FL |
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| Title: | Nitrogen rate required for acceptable St. Augustinegrass and associated nitrate leaching |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Turfgrass cultural practices, ecology and environment
Other records with the "Turfgrass cultural practices, ecology and environment" Section
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| Meeting Info.: | Minneapolis, Minnesota: November 15-18, 2015 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2015, p. 92332. |
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| Publishing Information: | [Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cultivar evaluation; Fertilization rates; Fertilizer recommendations; Nitrate losses; Nitrogen fertilization; Nutrient management; Nutritional requirements; Stenotaphrum secundatum
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| Cultivar Names: | Floratam |
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| Abstract/Contents: | "Recommended nitrogen (N) rates for St. Augustinegrass vary in Florida depending upon location. The objectives of this research were to determine the minimum N rate necessary to produce acceptable quality 'Floratam' St. Augustinegrass (Stenotaphrum secundatum [Walt.] Kuntze.) and to determine the influence of N rate and irrigation rate on NO3-N leaching. This research was conducted in Ft. Lauderdale, Citra, and Jay, FL from 2006 to 2008. Nitrogen was applied in Ft. Lauderdale, Citra, and Jay at rate of 98, 196, 294, and 588; 49, 196, 343, and 490; and 49, 98, 196, and 294 kg N ha-1 yr-1, respectively. Irrigation treatments consisted of applying 2.5 mm daily and 13.0 mm three times weekly, in Fort Lauderdale, and 13 mm applied twice weekly and 26 mm applied once weekly in Citra and Jay. In Ft. Lauderdale and Jay, lower than recommended N rates produced acceptable St. Augustinegrass during most cycles but not all. The 196 kg N ha-1 in Ft. Lauderdale and the 98 kg N ha-1 in Jay were the lowest N rates that produced acceptable turf during each cycle. In Citra, 60% more N was required than the current recommended minimum to produce acceptable turf. Nitrate-N leaching from each N rate was similar to the lowest N rate except when N rates exceeded recommended rates or when turf grass exhibited stress. The high irrigation rate increased NO3-N leaching by 2-fold compared to the low rate in Ft. Lauderdale, but had no influence on NO3-N leaching in Citra or Jay. Current minimum recommended N rates for St. Augustinegrass may be lower than necessary in Citra, more than necessary in Jay, and appropriate in Ft. Lauderdale to produce acceptable turf under normal environmental conditions. However, when turf was stressed, N rates provided no benefit to turf quality and increased NO3-N leaching." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"340-2" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Shaddox, T. W., J. B. Unruh, L. E. Trenholm, P. McGroary, and J. L. Cisar. 2015. Nitrogen rate required for acceptable St. Augustinegrass and associated nitrate leaching. Agron. Abr. p. 92332. |
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Last checked: 11/18/2015 |
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