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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1999/72331, UGA, Shuman.PDF
Last checked: 04/05/2013
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: 1999 Annual Report to the United State Golf Association, 1999. |
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| Publishing Information: | Griffin, Georgia: University of Georgia |
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| # of Pages: | 32 |
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| Collation: | [32] pp. |
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| Abstract/Contents: | "This project was initiated in 1998 to determine the potential transport of nitrogen and phosphorus by runoff of surface water from fairways and by leaching through golf greens. Experiments on leaching are being carried out at two venues (one greenhouse and one field) and runoff experiments at one field site on campus. A fourth site involves monitoring leachate from two greens at an Atlanta golf course. Highlights of results for this year are reported for each of the four venues. Two runoff experiments were carried out in 1999 on bermudagrass plots with a 5% slope. The first tested a granular 16-25-12 started fertilizer and the second a combination of ammonium nitrate and treble superphosphate. Both P sources resulted in the greatest transport at the first simulated rainfall event decreasing dramatically in the three subsequent events. Step-wise increases in P concentration and mass were found for the first event for the 11 and 21 kg ha-1 rates. The total mass of P transported combining all rainfall events were 21% for the superphosphate for each rate and 14 and 29% for the two rates, respectively, for the 16-25-12. The greenhouse experiment carried out this year was for four rates of ammonium nitrate-superphosphate and a water soluble 20-20-20 on columns made to USGA specifications for greens and sodded bermudagrass. The rates were added twice. A peak for transport was seen at weeks 18-19 for P and week 17 for N. Phosphate concentrations in the leachate were higher for the soluble source at the peak than for the superphosphate (Fig. I). There were little, if any, differences in N leaching found between the ammonium nitrate and the soluble source. Four treatments at three rates were made to field lysimeters in 1999 with the sources being a granular sulfur and poly coated 13-13-13 and a water soluble 20-20-20. Phosphorus showed little transport for any source or rate giving a slight response to treatments only once. The tendency was for the concentration and mass of transported P to decrease during the course of the year despite repeated fertilizer applications as high as 11 kg ha-1. Nitrogen applications showed transport responses for each application and the soluble source gave much higher transport than did the granular coated source. In fact, the granular source only showed peaks slightly above control for two of the four treatments. Phosphorus concentrations and mass continued to decrease in the leachates from the two putting greens located at an Atlanta country club as they have been for the four years we have been monitoring (Table 1). The bentgrass greens were constructed in the fall of 1994 and were fitted with three lysimeters each. Nitrate levels were generally low (below the 10 mg L-1r drinking water standard) for most of the year, but did increase to 20-25 mg L-1 late in the year in response to a high N application (0.88 lb. N/1000 sq. ft. as KNO3). In 1999 one of these greens was removed and two new playing greens were equipped with three lysimeters each." |
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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", 1999 Turfgrass and Environmental Research Summary [USGA], 1999, pp. 14-15, R=72331. R=72331 |
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| Note: | Tables
Graphs |
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Last checked: 04/05/2013
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