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.
2010
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Marianne BechmannSammendrag
Det er ikke registrert sammendrag
Sammendrag
We have mapped the quality of pasture resources for sheep grazing outdoor all year on ten localities along the west coast of Norway, using a classification scheme developed for this purpose. The classes reflect fodder value throughout the year. We performed an accuracy assessment, and identified possible sources of error. The accuracy is relatively low, and like others, we found that separating heath classes is a challenge. However, most errors can be explained by special mislocation and temporal change. Our further work with exploring grazing habits and landscape use of Old Norse sheep will include a GPS study of sheep movements overlaid with our pasture maps. We will update the map on that locality through field visits to enhance its accuracy.
Forfattere
Agnar KvalbeinSammendrag
Markedet for ferdigplen har vokst, og mange leverandører har produkter å tilby. Kundene stiller ofte små krav til kvalitet, men kjenner verdien av en krone eller to pr kvadratmeter. Noen proffkunder i golf- eller fotballbransjen stiller store krav til kvalitet. De kjøper ferdigplen fra utlandet hvis de ikke finner den kvaliteten de må ha. Anleggsgartnere, som lever av marginer og har kunder helt uten kompetanse, kan fristes til å kjøpe ferdigplen av dårlig kvalitet. Men hva er kvalitet? Produsenten, anleggsgartneren og sluttbrukeren stiller helt forskjellige krav. Mens produsenten ønsker gress som raskt kan omsettes og selges uten at jordtapet blir stort, vil anleggsgartneren først og fremst ha lette ruller og grasmatter som henger godt sammen. Sluttbrukeren er opptatt av at gresset skal være ugrasfritt, etablere seg raskt og gi en varig, vakker og slitesterk plen.
Forfattere
Agnar KvalbeinSammendrag
Presentasjonen tok for seg erfaringer med ferdigplen på golf- og fotballanlegg med denne disposisjonen: Arts og sortsvalg Etableringshastighet Temperatur Jord Gjødsling Bioforskprosjekt: Engrapp eller raigras? Ferdigplen på golfbaner Filt og sjikt Tørkeflekkproblematikk Vasket eller uvasket Skjøtsel etter legging Thick turf Reveted bunkers og annen spesiell anvendelse
Forfattere
Anne Kjersti BakkenSammendrag
Det er ikke registrert sammendrag
Forfattere
Liv Ostrem Arild LarsenSammendrag
Neutral detergent fiber, NDF, and the indigestible part, iNDF, were observed from market cultivars of Festulolium (Hykor, Felopa), Norwegian Festulolium candivars, the parent species perennial ryegrass (Lolium perenne) (cv. Napoleon, 4x), meadow fescue (Festuca pratensis) (cv. Fure) and timothy (Phleum pratense) (cv. Grindstad). Additionally leaf:stem ratio, developmental stage (msc) and total dry matter yield were observed. Field trials for dry matter yield assessment were established in 2006 at Vågønes (67°17"N, 14°27"E), Fureneset (61°34"N, 5°21"E), and Bjørke (60°48"N, 11°12"E) and for forage quality assessment at the two first mentioned locations. Genetic variation was identified for NDF and iNDF at early heading and heading stages between the investigated material. Highest content was found in cv. Hykor whereas in candivars only minor content was observed in leaves, however with higher content in stems. Promising candivars (FuRs0463, FuRs0357) from the Norwegian Festulolium breeding programme revealed better or equal to cultivars of their parental species as to content of NDF and iNDF. Winter survival which is a prerequisite for approved cultivars in Norway, was at an acceptable level in the candivars, and further breeding should preferably continue at the amphitetraploid level of the combination between perennial ryegrass and meadow fescue.
Forfattere
Petter D. Jenssen Tore Krogstad Adam Paruch Trond Mæhlum Kinga Adam Carlos A. Arias Arve Heistad Lena Jonsson Daniel Hellström Hans Brix Markku Yli-Halla Lasse Vråle Matti ValveSammendrag
Nine filter beds have been constructed in the Nordic countries, Denmark, Finland, Norway and Sweden. Filter beds consist of a septic tank followed by an aerobic pre-treatment biofilter and a subsequent saturated flow grass-covered filter. Thus, filter beds are similar to subsurface flow constructed wetlands with pre-treatment biofilters. but do not have wetland plants with roots submerged into the saturated filter. All saturated filters contain Filtralite (R) P. a light-weight expanded clay aggregate possessing high phosphorus sorption capacity. The filter bed systems showed stable and consistent performance during the. testing period of 3 years. Removal of organic matter measured as biochemical oxygen demand (BUD) was >80%, total phosphorus (TP) >94% and total nitrogen (TN) ranged from 32 to 66%. Effluent concentrations of fecal indicator bacteria met the European bathing water quality criteria in all systems. One system was investigated for virus removal and somatic viruses were not detected in the effluent. The investigations revealed that the majority of the BOD and nitrogen removal occurred in the pre-treatment filters and the phosphorus and bacteria removal was more prominent in the saturated filters. The saturated filters could be built substantially smaller than the current design guidelines without sacrificing treatment performance. The used filter material met the Norwegian regulations for reuse in agriculture with respect to heavy metals, bacteria and parasites. When saturated with phosphorus, the light-weight aggregate. Filtralite (R) P used in the saturated bed is a suitable phosphorus fertilizer and additionally has a liming effect. (C) 2010 Elsevier B.V. All rights reserved.
Forfattere
Eivind Uleberg Theodorus MeuwissenSammendrag
P>The effect on power and precision of including the causative SNP amongst the investigated markers in Quantitative Trait Loci (QTL) mapping experiments was investigated. Three fine mapping methods were tested to see which was most efficient in finding the causative mutation: combined linkage and linkage disequilibrium mapping (LLD); association mapping (MARK); a combination of LLD and association mapping (LLDMARK). Two simulated data sets were analysed: in one set, the causative SNP was included amongst the markers, while in the other set the causative SNP was masked between markers. Including the causative SNP amongst the markers increased both precision and power in the analyses. For the LLD method the number of correctly positioned QTL increased from 17 for the analysis without the causative SNP to 77 for the analysis including the causative SNP. The likelihood of the data analysis increased from 3.4 to 13.3 likelihood units for the MARK method when the causative SNP was included. When the causative SNP was masked between the analysed markers, the LLD method was most efficient in detecting the correct QTL position, while the MARK method was most efficient when the causative SNP was included as a marker in the analysis. The LLDMARK method, combining association mapping and LLD, assumes a QTL as the null hypothesis (using LLD method) and tests whether the 'putative causative SNP' explains significantly more variance than a QTL in the region. Thus, if the putative causative SNP does not only give an Identical-By-Descent (IBD) signal, but also an Alike-In-State (AIS) signal, LLDMARK gives a positive likelihood ratio. LLDMARK detected less than half as many causative SNPs as the other methods, and also had a relatively high false discovery rate when the QTL effect was large. LLDMARK may however be more robust against spurious associations, because the regional IBD is largely corrected for by fitting a QTL effect in the null hypothesis model.
Forfattere
Brita Toppe May Bente Brurberg Arne Stensvand Maria HerreroSammendrag
Rapportering om første funn av aggressiv bladskimmel (Plasmopara obducens) i lisespringsfrø (Impatiens walleriana).