Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2024
Abstract
Orchardgrass (Dactylis glomerata L.) is an important forage seed crop, but unlike other cool-season grasses, seed yields have not increased over time. Seed yield increases in orchardgrass may be possible with plant growth regulators (PGRs) such as trinexapac-ethyl (TE) and chlormequat chloride (CCC). Field trials were conducted at Hyslop Experimental Farm near Corvallis, Oregon, over three crop years (2017–2019) to examine the effects of spring nitrogen (N) and PGRs on seed production characteristics in orchardgrass. Spring N treatments included 0, 112, 157, and 202 kg N ha−1 and PGR applications were timed using the BBCH (Biologische Bundesanstalt, Bundessortenamt und Chemische Industrie) scale. Four PGR treatments included an untreated control, 210 g TE ha−1 at BBCH 32, 210 g TE ha−1 at BBCH 51, and 105 g TE ha−1 + 1500 g CCC ha−1 at BBCH 32. An interaction of spring N and PGR increased seed yields in 2 years, while spring N and PGR increased seed yield independently in the other year. The combination of TE and CCC PGRs did not increase seed yield over TE alone. Seed yield increases from spring N were due to an increase in seed number m−2, while increases in seed yield attributable to PGRs were the result of increased seed number m−2 and harvest index. This study suggests that the combination of 112 kg ha−1 spring N and 210 g ha−1 TE PGR is the best practice to maximize seed yield in orchardgrass.
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Pia Heltoft ThomsenAbstract
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Ivana Korn Korg Ingrid Nesheim Marek Gielczewski Michael Strauch Dominika Krzeminska Anne Marie Eurie ForioAbstract
The OPTAIN case study teams met with stakeholder Multi-Actor Reference Groups (MARGs) for the third time to jointly discuss preliminary modelling results for specific Natural/Small Water Retention Measures (NSWRM) and obtain feedback. https://www.optain.eu/news/stakeholder-multi-actor-reference-groups-margs-met-3rd-time-jointly-discuss-preliminary
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Arne Verstraeten Aldo Marchetto Andreas Schmitz Nicholas Clarke Anne Thimonier Char Hilgers Anne-Katrin Prescher Till Kirchner Karin Hansen Tamara Jakovljevic Carmen Iacoban Wim de Vries Bernd Ahrends Peter WaldnerAbstract
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Lars T. HavstadAbstract
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Zahra Bitarafan Wiktoria Kaczmarek-Derda Therese With Berge Carl Emil Øyri Inger Sundheim FløistadAbstract
BACKGROUND As regulations on pesticides become more stringent, it is likely that there will be interest in steam as an alternative approach for soil disinfestation. This study investigates the feasibility of utilizing a soil steaming device for thermal control of invasive plants. RESULTS Seeds of Echinochloa crus-galli, Impatiens glandulifera, Solidago canadensis, and rhizome fragments of Reynoutria × bohemica were examined for thermal sensitivity through two exposure methods: (1) steam treatment of propagative material in soil; (2) exposure of propagative material to warm soil just after heated by steam. Soil temperatures in the range of 60–99 °C and dwelling period of 3 min were tested. Increased soil temperature decreased seed germination/rhizome sprouting. The exposure method had a significant effect where higher temperatures were needed to reduce the seed germination/rhizome sprouting in method 2 explained by the effect of extra heat given in method 1. Using method 1, for E. crus-galli and S. canadensis, the maximum mean temperature of approximately 80 °C was enough to achieve the effective weed control level (90%). This was lower for I. glandulifera and higher for R. × bohemica. Using method 2, 90% control was achieved at 95 °C for S. canadensis; more than 115 °C for I. glandulifera; and more than 130 °C for E. crus-galli and R. × bohemica. CONCLUSION Our findings showed a promising mortality rate for weeds propagative materials through soil steaming. However, the species showed varying responses to heat and therefore steam regulation should be based on the differences in weeds' susceptibility to heat.
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Ioannis E. Tzanetakis V. Aknadibossian Josef Špak F. Constable S. J. Harper John Hammond Therry Candresse S. Y. Folimonova J. Freitas-Astua M. Fuchs W. Jelkmann V. I. Maliogka A. Marais R. R. Martin D. Mollov G. Vidalakis N. Aboughanem-Sabanadzovic M. Al Rwahnih O. J. Alabi D. Alioto H. Y. Atanda F. Bagi V. K. Baranwal C. Barbosa M. Bar-Joseph L. Batista Le Riverend T. Belien M. J. Beniıtez-Galeano H. Bennypaul A. Bertaccini R. Bester A. G. Blouin Dag-Ragnar Blystad M. Botermans O. Bozan A. Brakta Y. Brans A. Bulajic K. Caglayan A. Catara E. Choueiri M. Cieslinska G. Cook W. Cui J. da Graça S. Davino C. Delmiglio M. M. Dewdney F. Di Serio Zhibo HamborgAbstract
No abstract has been registered