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| Web URL(s): | http://etd.fcla.edu/UF/UFE0022081/rowland_j.pdf
Last checked: 01/05/2011
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Thesis |
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| Monographic Author(s): | Rowland, John Hudson |
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| Author Affiliation: | University of Florida |
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| Monograph Title: | Impact and Control of Organic Matter in USGA Ultradwarf Bermudagrass Golf Greens, 2008. |
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| Publishing Information: | M.S. Thesis: University of Florida |
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| # of Pages: | 115 |
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| Collation: | 115 pp. |
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| Keywords: | TIC Keywords: Aerification; Application timing; Cultivar evaluation; Cultural methods; Cynodon dactylon; Cynodon dactylon x Cynodon transvaalensis; Golf greens; Thatch control; Vertical mowing
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| Cultivar Names: | FloraDwarf; TifEagle; Champion |
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| Abstract/Contents: | "Ultradwarf bermudagrasses [Cynodon dactylon (L.) Pers. x C. transvaalensis Burt Davy] are commonly used for golf course putting greens in Florida due to their ability to tolerate high temperatures and low mowing heights for fast green speeds. Their dense growth habits can cause excessive organic matter build-up above and below the soil line, negatively affecting surface and soil characteristics. This experiment was conducted to evaluate seasonal impacts of commonly used cultural management practices on United States Golf Association ultradwarf bermudagrass putting green properties to determine optimum timing and effectiveness of treatments. Three ultradwarf varieties ('FloraDwarf', 'TifEagle', and 'Champion') were subjected to six cultural management treatments: Hollow tine aerification (one, two, or three times yearly), deep verticutting (three times yearly), solid tine aerification (five times yearly), and an untreated control. Treatments were applied over Spring-Summer (SS) and Summer-Fall (SF) studies with organic matter (OM), soil organic matter (SOM), soil physical properties, and turfgrass characteristics being analyzed. Soil organic matter and physical properties were determined from 5.1 cm diameter, by 9.5 cm deep soil cores. Saturated hydraulic conductivity (Ksat) was determined on a constant head permeameter with, and without verdure. Using mixed model analysis, we found no reduction of OM or SOM due to treatments. Saturated hydraulic conductivity was increased by three-time yearly hollow tine aerification (HTA 3x) in both studies; removing verdure resulted in an average reduction of 3.2 cm hr-1. Average final Ksat of all treatments was 20 cm hr-1 slower in the SF study. Bulk density (Db) was not reduced below control levels by treatments. An overall increase in Db of 0.2 g cm-3 occurred in the SF study. Champion had lower Db in both studies. Relative density (Dp) was increased by HTA 3x in the SS study. An overall decrease in Dp of 0.4 g cm-3 occurred in the SF study. Hollow tine aerification 3x produced more total pore space (TPS), than the control and verticutting in the SS study, but only more than verticutting in the SF study. Champion had the highest TPS in the SS study. Macropore space was increased more by HTA 3x than verticutting in both studies. All pore space fractions reduced substantially in the SF study. Average turf quality ratings were highest for the control in both studies. Champion had lower turf quality than TifEagle in the SS study. Surface compressibility was reduced least by the control, while HTA 3x provided a firmer surface than HTA 2x, which was firmer than HTA 1x. Champion scalped more than FloraDwarf, which scalped more than TifEagle in the SS study. Verticutting and HTA 3x reduced shoot counts in the SS study. Verticutting had higher volumetric water content than HTA 3x in the SS and SF studies. Since verticutting had the firmest surface, least mower scalping and localized dry spot, and eventually had higher quality, water-holding capacity, and fewer clippings it was the most beneficial treatment, particularly since no other treatment significantly reduced OM or SOM. Reduced Ksat, increased Db, and reduced pore space in the SF study showed that this seasonal treatment timing was least effective in managing soil properties. Due to higher overall quality, reduced scalping and LDS, TifEagle stood out as the best overall grass studied." |
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| Language: | English |
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| References: | 81 |
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| See Also: | Other items relating to: Bermudagrasses - Ultradwarf Cultivars |
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| Note: | Pictures, color
Tables
Graphs
Includes list of abbreviations; pp. 11-12
Advisor: George H. Snyder |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rowland, John Hudson 2008. Impact and Control of Organic Matter in USGA Ultradwarf Bermudagrass Golf Greens. M.S. Thesis: University of Florida. |
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| Web URL(s):
http://etd.fcla.edu/UF/UFE0022081/rowland_j.pdf
Last checked: 01/05/2011
Requires: PDF Reader |
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