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| Web URL(s): | https://scisoc.confex.com/scisoc/2016am/webprogram/Paper100403.html
Last checked: 11/22/2016 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Soldat, Douglas J.;
Koch, Paul |
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| Author Affiliation: | Soldat: University of Wisconsin-Madison, Madison, WI; Koch: Plant Pathology, University of Wisconsin-Madison, Madison, WI |
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| Title: | Potassium fertilization increases microdochium patch incidence and severity on creeping bentgrass |
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| Section: | Turfgrass management: Diseases/insects
Other records with the "Turfgrass management: Diseases/insects" Section
C05 turfgrass science
Other records with the "C05 turfgrass science" Section
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| Meeting Info.: | Phoenix, Arizona: November 6-9, 2016 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2016, p. 100403. |
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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: Agrostis stolonifera; Disease incidence; Disease severity; Fertilization rates; Golf greens; Microdochium patch; Potassium fertilizers; Quality evaluation
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| Abstract/Contents: | "Despite the many benefits associated with potassium (K) fertilization of turfgrass, few research studies have examined how the soil and tissue levels of potassium influence turfgrass quality, growth, and disease development. Turfgrass managers often apply large doses of potassium to turfgrass (>300 kg/ha) to putting greens. However, with more accurate information, turfgrass managers may be able to reduce their potassium applications, thus saving time and money, while not reducing and possibly enhancing the quality of the turfgrass they manage. The objective of this research is to evaluate putting green quality, growth, and disease incidence over a wide range of soil test and tissue potassium levels. This project was initiated in 2011 on a USGA putting green with A4 creeping bentgrass. The experiment was a randomized complete block design with four replications. The treatments included five different levels of biweekly liquid potassium sulfate at rates ranging from zero to 30 kg/ha of K. Paired soil and plant tissue samples were collected monthly along with measurements of clipping yield. Turfgrass color and visual quality was evaluated biweekly. Disease incidence was quantified by counting Microdochium patch infection centers and disease severity was visually rated as percent area affected by using the grid intersection method. Few, if any, differences in turf color, quality, or growth rate among the treatments were observed during the first four years of the study. In the fifth year, significantly lower turf quality was observed on the two no K treatments. However, these low K treatments had significantly less Microdochium patch than the treatments receiving K applications during the past three winters. Plant tissue K content was below 1.5% in treatments with the least Microdochium patch compared to tissue K content between 1.8-2.2% in K treated plots. Mehlich-3 K was near 20 mg/kg in the no K treatments and ranged from 25-50 mg/kg in the treatments receiving K. No significant differences in other diseases including dollar spot or brown patch were observed during the study. Results suggest that potassium fertilization can be manipulated to reduce Microdochium patch severity on creeping bentgrass putting greens." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"243-3" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Soldat, D. J., and P. Koch. 2016. Potassium fertilization increases microdochium patch incidence and severity on creeping bentgrass. Agron. Abr. p. 100403. |
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Last checked: 11/22/2016 |
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