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| Web URL(s): | http://www.bioforsk.no/ikbViewer/Content/34628/r_30_2008_final.pdf
Last checked: 09/19/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Espevig, Tatsiana;
Aamlid, Trygve S.;
Tronsmo, Arne;
Jensen, Katarina Gundsø;
Molteberg, Bjørn;
Hjeljord, Linda;
Tronsmo, Anne Marte;
Susort, Åge;
Enger, Frank |
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| Author Affiliation: | Espevig, Aamlid, and Susort: Bioforsk Øst Landvik; Arne Tronsmo, Jensen, Hjeljord, and Anne Marte Tronsmo: Norwegian University of Life Sciences (UMB); Molteberg and Enger: Bioforsk Øst Apelsvoll |
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| Title: | Winter hardiness and management of velvet bentgrass (Agrostis canina) on putting greens in northern environments: Report from the first experimental year 2007 |
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| Source: | Bioforsk Report. Vol. 3, No. 30, 2008, p. 1-32. |
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| Publishing Information: | s.l.: Scandinavian Turfgrass and Environmental Research Foundation (STERF) |
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| # of Pages: | 32 |
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| Keywords: | TIC Keywords: Agrostis canina; Cold resistance; Comparisons; Control methods; Cultivar evaluation; Evaluative methods; Irrigation practices; Thatch accumulation; Topdressing program; Turfgrass quality
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| Cultivar Names: | Avalon; Greenwich; Legendary; Villa |
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| Geographic Terms: | Norway |
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| Abstract/Contents: | "During 2003-06, velvet bentgrass (Agrostis canina L.) had better winter survival and turf quality than any other species in green trials at Bioforsk Apelsvoll and Landvik, Norway. Major concerns for the introduction of this species on Nordic golf courses are whether current cultivars have sufficient winter hardiness, and if it is possible to control the rapid formation of thatch in this species. To meet these challenges our project is divided into three subprojects: 1) screening of velvet bentgrass cultivars for winter hardiness; 2) fertilization, mechanical/biological thatch control and topdressing on velvet bentgrass greens; and 3) irrigation regimes on velvet bentgrass greens with different rootzone compositions. Screening of the velvet bentgrass cultivars Avalon, Greenwich, Legendary and Villa compared with the creeping bentgrass cultivar Penn A-4 (control) for winter hardiness was carried out at UMB during 2006/2007. None of the tested cultivars, whether hardened or not, tolerated freezing to -9°C or lower. On average for hardened and unhardened plants, the velvet bentgrass cultivars tolerated freezing to -6°C better than Penn A-4. Velvet bentgrass Greenwich was the most tolerant to freezing. In a second experiment exposing the same cultivars to various combinations of simulated snow cover, ice cover and/or pink snow mould (Microdochium nivale), creeping bentgrass Penn A-4 survived better than the velvet bentgrass cultivars. Among the velvet bentgrasses, Avalon (SR 7200) was less winter tolerant to the simulated winter conditions than Villa, Legendary and Greenwich. The hardening requirement was lower and the tolerance to M. nivale better in Penn A-4 than in the velvet bentgrasses, but Penn A-4 and the velvet bentgrasses did not differ significantly in tolerance to simulated ice or snow cover. During the winter 2007/2008 these preliminary data will be supplemented by new results which also include the velvet bentgrass cultivars Vesper and Venus and the pathogens Typhula ishikariensis and T. incarnate. Field trials were initiated at the coastal location Landvik (58°N, 12 m a.s.l.), and the inland location Apelsvoll (61°N, 250 m a.s.l.) in SE Norway in August 2007 to examine velvet bentgrass requirements for fertilizer inputs, mechanical/ biological thatch control, and topdressing levels. The experimental treatments started when grow-in was completed about two months after sowing. The higher fertilizer level 1.5 kg N/100 m2/yr resulted in better turfgrass overall impression and apparently less disease (mostly caused by Microdochium nivale and Pythium sp.) than the lower fertilizer level 0.75 kg N/100 m2/yr. Application of 1.0 mm sand every two weeks was too much at the lower fertilizer level, but at 1.50 kg N/100 m2/yr there was no difference in turfgrass overall impression between the 0.5 and 1.0 mm topdressing levels. Grooming and grooming plus verticutting led to better turfgrass overall impression than grooming plus coring/spiking, but the effects of these mechanical thatch methods on turfgrass ground cover, tiller density, colour or disease levels were not significant. Five applications of the biological product 'Thatch-lessTM' had no effect on total bacteria or fungi numbers in soil samples taken in November 2007. A lysimeter field trial at Landvik was started in August 2007 to compare wilt-based and field-capacity based irrigation on rootzones with and without 2.5% (w/w) organic matter from garden compost. Turfgrass overall impression was better and disease levels lower with inclusion of organic matter in the rootzone. Different irrigation regimes had no significant effect on plots overall impression, density or colour, but field-capacity-based irrigation (light and frequent) led to significantly higher soil humidity, better turfgrass ground coverage and less diseases than wilt-based irrigation (deep and infrequent). The field trials will continue in 2008 and 2009." |
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| Language: | English |
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| References: | 46 |
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| See Also: | See also related item, Experimental Results and Practical Experiences With Velvet Bentgrass (Agrostis canina) on Golf Courses in Nordic Countries: An Update from the STERF Project 'Velvet Green', 2007-2010, [2009], R=288733. R=288733 |
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| Note: | Map
Pictures, color
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Espevig, T., T. S. Aamlid, A. Tronsmo, K. G. Jensen, B. Molteberg, L. Hjeljord, et al. 2008. Winter hardiness and management of velvet bentgrass (Agrostis canina) on putting greens in northern environments: Report from the first experimental year 2007. Bioforsk Report. 3(30):p. 1-32. |
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Last checked: 09/19/2017
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