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.
2012
Sammendrag
Den Nord-Atlantiske Oscillasjonen (NAO) påvirker klimaet på store deler av den nordlige halvkule. Formålet med denne studien var å bestemme NAOs innvirkning på risikoen for frostskader i høsthvete. Modellsimuleringer ble utført for totalt 53 vintersesonger fra 1957/58 til 2009/10. Resultatene viser at det var større risiko for frostskader under negative NAO-faser enn under positive og nøytrale faser.
Sammendrag
Geitene på utmark på Gibostad i Troms spiste en variert diett med mye halvgras, gras, busker og trær, både tidlig og seint i beiteperioden. På innmarksbeite tok geitene opp mest timotei tidlig i beitesesongen, mens engsvingel og kveke var hoveddiett seint i august. Valget av beiteplanter reflekterte både det som til enhver tid var tilgjengelig, men også næringsverdien til beiteplantene.
Sammendrag
Begrenset næringstilførsel er viktig for å oppnå grøntarealer med lite behov for slått og skjøtsel. Her presenteres resultater som viser at bruk av små mengder slam og kompost ved etablering av vegetasjon på undergrunnsmasser kan gi sikker etablering av grasvegetasjon med lite behov for skjøtsel.
Sammendrag
Grøntmiljø gir et mangfold av positive effekter, men det må framskaffes mer konkret kunnskap om betydningen av grøntmiljø i forskjellige områder og sammenhenger. Hovedutfordringen blir å knytte sammen effektene av mange små tiltak slik at de samlet gir et viktig bidrag til bærekraftig utvikling av urbane områder.
Sammendrag
Beiting av planter i vekst er hovedkilde til flerumetta fettsyrer i kjøtt og melk hos drøvtyggere. Lammekjøtt produsert på beiter har et signifikant høyere innhold av omega-3 fettsyren alfa-linolen (ALA), enn lammekjøtt produsert på surfôr/kraftfôr.
Forfattere
Randi Berland Frøseth Anne Kjersti Bakken Marina Azzaroli Bleken Hugh Riley Kristian Thorup-Kristensen Sissel HansenSammendrag
Det er ikke registrert sammendrag
Forfattere
Marit Jørgensen Rebekka M L Helgesen Margrete Eknæs Jørgen A.B. Mølmann Håvard SteinshamnSammendrag
Norwegian goat milk production is based on summer grazing on diverse forest or alpine rangeland, and the quality of these pastures is important for milk quantity and quality. We used n-alkanes and long chained alcohols found in plant waxes as markers to estimate diet composition in goats grazing on a heterogeneous rangeland during two periods in summer; early (beginning of July) and late (end of August). Some of the goats were fitted with GPS collars that recorded their position. Preliminary results show a diverse diet, where ferns, sedges, blueberry (Vaccinium myrtillis) and birch (Betula pubescens) were preferred in early summer. In late summer the diet was particularly diverse, coinciding with a general decline in plant quality.
Sammendrag
The objective was to examine the effect of pasture type, and of grazing compared with hay feeding, on milk production and quality from dairy goats in early and late grazing season. Eighty goats were grouped according to genotype and lactation, and randomly divided into two groups with approximately 8 weeks difference in kidding date and start of feeding experiment, in Early and Late grazing season. At the start of the feeding experiment the goats were divided into 4 forage-treatment groups: R,forest rangeland pasture; C, cultivated pasture; HH, high quality hay; HL, low quality hay. Group R yielded less milk (1.5 vs. 2.0 kg d–1) and lower milk protein content (32 vs. 33 g kg–1), but higher milk fat (46 vs. 37 g kg–1) and DM content (120 vs. 113 g kg–1) than group C. Free fatty acids (FFA) content in milk was not affected by pasture type. The effects of pasture type on milk yield and milk constituents were similar in early and late grazing season. Grazing resulted in similar milk yield but higher milk fat (42 vs. 34 g kg–1), protein (32 vs. 30 g kg–1) and DM (117 vs. 106 g kg–1) content, and lower content of FFA (0.22 vs. 0.34 mEq L–1) than hay feeding
Forfattere
Margarita Novoa-Garrido Lise Aanensen Vibeke Lind Hans Jørgen S. Larsen Søren K. Jensen Espen Govasmark Håvard SteinshamnSammendrag
In winter fed organic raised sheep inadequate plasma vitamin E levels is common and therefore supplementation is recommended. The objective of the present work was to test the supplementation of natural vitamin E and seaweed meal on the immune status of ewes and their offspring. Forty Norwegian White Sheep ewes were randomly allocated to three supplementation treatments: natural vitamin E, synthetic vitamin E, seaweed meal, and control. The feeding experiment lasted the entire indoor feeding period. Ewes and newborn lambs were vaccinated against different environmental microorganisms and pathogens. Different immunological parameters were measured. Supplementing the ewes with natural vitamin E had positive effect on immunity against Mycobacterium bovis in lambs. Seaweed, on the other hand, had negative effect on the passive transfer of maternal antibodies in lambs the first week after birth. The adaptive immunity was not affected by seaweed supplementation.
Sammendrag
The objective was to compare the effects of supplementing lactating dairy cows with synthetic (All-rac), natural (RRR) α-tocopheryl acetate or seaweed with a control on the concentration of α-tocopherol in blood and milk. Twenty four dairy cows in mid lactation, fed an organic feed ration, were randomly allocated to the four treatments in a replicated Latin square design. Plasma and milk α-tocopherol concentrations were higher in RRR and All-rac than in the other treatments and higher in RRR than in All-rac. RRR-α-tocopherol was the predominant steroisomer (> 86%), in both plasma and milk, whereas the remaining part was largely made up by the three synthetic 2R isomers. In cows fed the control, seaweed and RRR, the proportion of RRR-α-tocopherol in plasma and milk constituted more than 97% of the total α-tocopherol. The study demonstrated that dairy cows in mid and late lactation have preferential uptake of RRR-α-tocopherol compared to other stereoisomers.