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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1998/61860,%20U%20Georgia,%20Shuman.PDF
Last checked: 10/22/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Shuman, Larry M. |
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| Author Affiliation: | University of Georgia, Griffin, GA |
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| Monograph Title: | Nitrate and Phosphorus Leaching and Runoff from Golf Greens and Fairways: [1998 Annual Research Report], 1998. |
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| Publishing Information: | Griffin, Georgia: University of Georgia |
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| # of Pages: | 26 |
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| Collation: | [26] pp. |
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| Abstract/Contents: | "A project was initiated to determine the potential transport of nitrogen and phosphorus by runoff of surface water from fairways and by leaching through golf greens. The research especially emphasizes studies on phosphorus transport. Experiments are being carried out at four research venues developed by Dr. Albert Smith to study pesticide fate. An overview of the results from three of these areas are reported here summarizing preliminary data, since this is the first year of the project. Runoff of phosphorus from bermudagrass plots with a 5% slope from rates of a 10-10-10 fertilizer were greatest at the first simulated rainfall event (Fig. I). The runoff decreased dramatically during subsequent rainfall events. Step-wise increases in P concentrations in the runoff were found for the 5 and 11 kg ha-1 rates for the first runoff event. The total mass of P transported for all four events was 10.6 and 11.5% of that added for the 5 and 11 kg ha-1 rates, respectively. Nitrate runoff followed a different pattern resulting in a higher mass of nitrated during the second rainfall event, when the runoff water volume was highest. Since the ammonium form of nitrogen was applied, the amounts of nitrate in the runoff would depend on rates of nitrification as well as transport parameters. A greenhouse experiment was carried out with columns made to USGA specifications for greens and sodded with bermudagrass. Two sources of balanced fertilizers were applied at four rates to determine potential leaching. The sources applied were a water soluble fertilizer and a sulfur and poly-coated micro-granular fertilizer to study both fast and slow-release types. These rates were added every other week for a total of six weeks with the last treatment being made at week eleven. Phosphorus concentrations in the leachate were much higher for the soluble source at the end of the eleventh week of the experiment (Fig. II). The difference is especially great at the lowest P rate (5 kg ha-1). In fact, at that rate the granular source resulted in P concentrations in the leachate that were not different from control. Leaching of nitrogen and phosphorus has been monitored for two working putting greens at an Atlanta country club since January, 1995. The bentgrass greens were constructed in the fall of 1994 and were fitted with three lysimeters each. The nitrate concentrations in the leachate did not exceed the 10 mg L-1 drinking water standard for the first three years of monitoring. For 1997 the nitrogen concentrations increased in the leachate about 20 to 30 days after application. For all the years, increases in the mass of nitrogen tended to correspond with rainfall events. The concentration of nitrate and the total mass in the leachate is increasing over time. Phosphorus concentrations in the leachate were highest the first year and decreased dramatically thereafter. These initial higher concentrations were probably caused by higher P applications in 1994 during grow-in." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Nitrogen and phosphorus leaching and runoff from golf greens and fairways" 1998 Turfgrass and Environmental Research Summary [USGA], 1998, p. 55-56, R=61860. R=61860 |
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| Note: | Also appears as pp. 589-615 in the USGA Turfgrass Research Committee Reporting Binders for 1998.
"1998 Annual Report to the United States Golf Association"
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Last checked: 10/22/2013
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