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| Web URL(s): | https://scisoc.confex.com/crops/2015am/webprogram/Paper92667.html
Last checked: 11/20/2015 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Dodson, Kathleen Laura;
Chaves, Laura Cortese;
Ross, James B. |
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| Author Affiliation: | Ross: Prairie Turfgrass Research/Olds College Centre of Innovation; Dodson and Chaves: Olds College, Olds, AB, Canada |
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| Title: | Determining action thresholds for reducing winter injury of annual bluegrass under restricted air-flow conditions |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Turfgrass science: II
Other records with the "Turfgrass science: II" 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. 92667. |
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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: Air movement; Anoxic conditions; Climatic factors; Cold resistance; Cultivar evaluation; Golf greens; Poa annua; Golf green surface; Threshold values; Winter injury
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| Abstract/Contents: | "Annual bluegrass (Poa annua L.) putting greens often experience winter damage due to several factors including anoxia, crown hydration, and freezing temperatures in the cold climates of North America. Previous research has shown a rapid loss of hardiness in annual bluegrass between 45 and 60 days (d) of continuous ice cover as well as a rapid depletion of carbohydrate reserves under anoxic conditions (Tompkins et al., 2004), but little is known about the relationship between ice cover, anoxia, and action thresholds for turf managers. The objectives of this study were to determine the effects of different gas concentrations on lethal temperature (LT50) to establish action thresholds and the relationship between LT50 and crown sucrose, fructose, and glucose contents in annual bluegrass. Annual bluegrass (Two-putt Poa annua cv. reptans) plugs (7.6 x 10.2 cm) were placed in hermetically sealed 1.9 L mason jars with the following gas treatments: air (20.9% O2: 0.04% CO2), slightly anoxic (5% O2:10% CO2), and anoxic (0% O2:15% CO2). Cold tolerance was evaluated at 15, 30, 45 and 60 d and LT50 was determined. Additionally, crown sucrose, fructose, and glucose contents will be determined and correlated with LT50 data to examine the relationship between anoxia and crown carbohydrates. No difference in LT50 was seen between the slightly anoxic (5 O2: 10 CO2) treatment and the air treatment, while the anoxic treatment (0 O2:15 CO2) had a reduced LT50 value. Cold hardiness was not affected by low (5%) O2 conditions; however, once anoxic conditions are detected immediate action should be taken." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"418-7"
"Poster Number 719" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dodson, K. L., L. C. Chaves, and J. B. Ross. 2015. Determining action thresholds for reducing winter injury of annual bluegrass under restricted air-flow conditions. Agron. Abr. p. 92667. |
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Last checked: 11/20/2015 |
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