Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2009
Sammendrag
Two female and two male cultivars have previously been released as a result of clone evaluation at Bioforsk Nord Holt. The selection criteria were the number of pistils or stamens per flower, the number of flowers and the number of shoots per m2. Currently a new group of clones are being evaluated with the aim of finding new cultivars for release. The preliminary results on flowering and berry production show a strong variance in these traits. Over three years of registration, the number of produced flowers varied from under 100 for the weakest clone to more than 1000 for the best clone. The number of produced berries varied from 9 for the weakest clone to 242 for the best clone. The three clones that produced the most flowers all had very low berry production and deviated from the rest of the clones by having high numbers of flowers per harvested berry. New selection criteria will be considered before selection of new cultivars for release. In addition to the production traits, new selection criteria will most likely include berry contents, such as the levels of antioxidants.
Forfattere
Liv Nilsen Asbjørn MoenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Within the scope of the ClimRunoff project, it is necessary to develop an accurate method for estimating peak discharges for the purpose of correctly sizing hydraulic structures at road and rail crossings. The presence of a snowpack and/or ice has an impact on the way the watershed will react to rain events. The first step in understanding the effects of the changing climate is to understand the reaction of the catchment to situations that are happening in today"s climate. After correctly modeling the processes currently occurring during cold seasons today, future scenarios can be modeled to see what effects changes in precipitation patterns and temperatures will have on catchment hydrology. The overall goal of this work is to provide an accurate estimate of runoff water produced from snowmelt on a catchment scale in order to support the development of more accurate methods of estimating peak discharge for road drainage structures. Use is made of the Utah Energy Balance model and the LISEM model. The coupling of the UEB and LISEM models provides valuable insight into the hydrological processes and responses occurring during winter periods. However, more work is needed to improve our understanding and quantification of soil-water interactions during cold periods, which can cause great deviations from hydrologic processes observed during warmer periods.
Forfattere
Ingrid L.P. Nyborg Bahadar Nawab Ola Hanserud Gry SynnevaagSammendrag
The report presents the background for the workshop; approaches, opportunities and challenges in sanitation in Afghanistan and Pakistan; the potential contribution of CIIT and UMB in sustainable sanitation; the potential for future collaboration; and workshop follow-up.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Mari Mette Tollefsrud Jørn Henrik Sønstebø Christian Brochmann Øistein Johnsen Tore Skrøppa GG VendraminSammendrag
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Sammendrag
Modified wood is commercially available and merchandized as a new, environmentally friendly and durable wood species. However, there are no standards focusing on the evaluation of modified wood. Combining resistance against fungal decay and good ecotoxicological properties may be a start. In this study softwood and hardwood species were furfurylated using different treatment processes and treating solutions. The durability was determined by exposing the treated wood to a range of Basidiomycetes and the ecotoxicity was studied on two aquatic organisms.It was the purpose to come to a strategy and how to unite efficacy and ecotoxicity, since this is important in product development. The results show that the selection of fungus used for mass loss determination and the choice of ecotoxicity method is decisive, confirming that a combination of methods is valuable. A tiered approach to find the optimal treatment seems the best option. First, adequate protection against wood-rotting fungi should be attained, followed by ecotoxicity evaluation of the wood leachates. If necessary, the optimization process should be repeated until both durability and ecotoxicity are within satisfactory limits. This process could be extended with other evaluation criteria, e.g. dimensional stability of the modified wood or a risk analysis of its leachate.
Forfattere
Randi Therese Garmo Erik Ropstad Øystein Havrevoll Erling Thuen Håvard Steinshamn Andres Waldmann Olav ReksenSammendrag
Relationships among commencement of luteal activity (C-LA), milk yield, and energy balance (EB) were investigated in 3 selection lines of Norwegian Red cows at the Norwegian University of Life Sciences from 1994 through 2001. The cows were selected for low genetic merit for milk yield (LMP), high genetic merit for milk yield (HMP), and a combination of high indices for milk yield and fertility (HI). Breeding values for fertility were based on 56-d nonreturn rate. The material included 268 lactations from 147 cows. Milk samples for progesterone analysis were drawn 3 times weekly from 1994 through 1998, and 2 times weekly from 1999 to 2001. Commencement of luteal activity was defined as the first 2 consecutive measurements of progesterone concentration > 3 ng/mL not earlier than 10 d after calving. Selection line was significantly related to C-LA, so that the least squares mean days from calving to C-LA were 22.5, 30.4, and 27.2 d for LMP, HMP, and HI cows, respectively. The HMP cows produced more milk than the LMP cows. The average milk yield in the sixth week of lactation was 24.0, 27.1, and 25.3 kg for LMP, HMP, and HI cows, respectively. The interval to C-LA decreased for the HMP and HI cows after phenotypic adjustment for EB in the model. Least squares means for the interval to C-LA were 23.2, 29.7, and 25.6 d for the LMP, HMP, and HI cows, respectively, in a model that included parity, selection lines, and EB as covariates. Cumulated EB during the first 4 wk of lactation, which itself differed between selection lines, did not fully account for differences in interval to C-LA between selection lines. Thus, the results of the present investigation indicate that selection for milk yield negatively affects C-LA over and above the effects caused by concurrent changes in EB. The increase in days to C-LA caused by selection for high yields can be reduced if selection for milk yield is combined with fertility in the breeding program.
Forfattere
Nils Vagstad Helen French H.E. Andersen H. Behrendt B. Grizzetti P. Groenendijk A. Lo Porto H. Reisser C. Siderius J. Stromquist J. Hejzlar Johannes DeelstraSammendrag
Det er ikke registrert sammendrag