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.
2021
Forfattere
Inger Hansen Grete H. M. Jørgensen Christine K. Berge Gunvor E. Nagel-Alne Marianne Gilhuus Solveig M. Stubsjøen Kristian Ellingsen-Dalskau Cecilie M. MejdellSammendrag
Produksjonen av storfekjøtt i Norge kjennetegnes bl.a. av stor variasjon med hensyn til fjøsbygg, driftssystemer, driftsrutiner og beiteforhold. Vi har besøkt 30 gårdsbruk og spurt produsentene selv om hva som er de viktigste suksessfaktorene for god produksjon og dyrevelferd i storfekjøttproduksjonen. I en serie på tre NIBIO-POPer publiseres resultater fra prosjektene «Arktisk storfekjøttproduksjon» (Hansen & Jørgensen 2016) og «Storfekjøttproduksjon i fjellregionen» (Berge m.fl. 2017). Dette er den andre, hvor vi deler bøndenes anbefalinger for god dyrevelferd og trygg produksjon. Målgruppa er storfekjøttprodusenter, spesielt de som er i etableringsfasen.
Sammendrag
Produksjonen av storfekjøtt i Norge kjennetegnes bl.a. av stor variasjon med hensyn til fjøsbygg, driftssystemer, driftsrutiner og beiteforhold. Vi har besøkt 30 gårdsbruk og spurt produsentene selv om hva som er de viktigste suksessfaktorene for god produksjon og dyrevelferd i storfekjøttproduksjonen. I en serie på tre NIBIO-POPer publiseres resultater fra prosjektene «Arktisk storfekjøttproduksjon» (Hansen & Jørgensen 2016) og «Storfekjøttproduksjon i fjellregionen» (Berge m.fl. 2017). Dette er den tredje, hvor vi fokuserer på økonomiske beregninger fra utvalgte gårdsbruk i Nord-Norge. Målgruppa er rådgivere og storfekjøttprodusenter, spesielt de som er i etableringsfasen.
Sammendrag
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Forfattere
Spiridoula Athanasiadou Marit Almvik Jarkko Hellström Eva Madland Nebojsa Simic Håvard SteinshamnSammendrag
Helminth parasitic infections are common in small ruminants in Norway; infection is usually treated with anthelmintic drugs, but anthelmintic resistance is an increasing problem. It is necessary to identify strategies to reduce the use of anthelmintic drugs and mitigate the impact of anthelmintic resistance. Condensed tannin (CT)-rich forages have been shown to reduce the helminth burden in small ruminants, but these forages have limited cultivation potential in Scandinavia. A good source for CT in cold climatic regions may be the bark of several commercially utilized tree species. In the present study, we determined the content and characterized the type of CT in bark extracts of pine (Pinus sylvestris L.), spruce (Picea abies L.), and birch (Betula pubescens). Extracts of selected bark samples were tested for their anthelmintic efficacy against the ovine infectious nematode Teladorsagia circumcincta. Total CT content was higher in the bark from younger (10–40 years old) pine and spruce trees; it decreased with tree age in pine, whereas it remained relatively stable in the bark of spruce and birch. Pine trees consisted of 100% procyanidins, whereas prodelphinins were present in most spruce (4–17%) and all birch samples (5–34%). Our studies clearly showed that there is variation in the anthelmintic activity of water and acetone extracts of bark samples collected from various sites around Norway, as this was measured with two independent in vitro assays, the egg hatch and larvae motility assays. The anthelmintic activity of some extracts was consistent between the two assays; for example, extracts from the three samples with the highest CT content showed very high activity in both assays, whereas the extract from the sample with the lowest CT content showed the lowest activity in both assays. For other extracts, activity was not consistent across the assays, which could be attributed to the susceptibility of the different stages of the parasitic life cycle. We demonstrated that bark extracts from commercially used trees in Scandinavia have the potential to be used as alternatives to anthelmintics. Further work should focus on refining the associations between bark extracts and anthelmintic activity to identify the best strategies to reduce the input of anthelmintic drugs in livestock production systems.
Sammendrag
This study investigated the potential of in-season airborne hyperspectral imaging for the calibration of robust forage yield and quality estimation models. An unmanned aerial vehicle (UAV) and a hyperspectral imager were used to capture canopy reflections of a grass-legume mixture in the range of 450 nm to 800 nm. Measurements were performed over two years at two locations in Southeast and Central Norway. All images were subject to radiometric and geometric corrections before being processed to ortho-images, carrying canopy reflectance information. The data (n = 707) was split in two, using half the data for model calibration and the remaining half for validation. Several powered partial least squares regression (PPLSR) models were fitted to the reflectance data to estimate fresh (FM) and dry matter (DM) yields, as well as crude protein (CP), dry matter digestibility (DMD), neutral detergent fibre (NDF), and indigestible neutral detergent fibre (iNDF) content. Prediction performance of these models was compared with the prediction performance of simple linear regression (SLR) models, which were based on selected vegetation indices and plant height. The highest prediction accuracies for general models, based on the pooled data, were achieved by means of PPLSR, with relative root-mean-square errors of validation of 14.2% (2550 kg FM ha−1), 15.2% (555 kg DM ha−1), 11.7% (1.32 g CP 100 g−1 DM), 2.4% (1.71 g DMD 100 g−1 DM), 4.8% (2.72 g NDF 100 g−1 DM), and 12.8% (1.32 g iNDF 100 g−1 DM) for the prediction of FM, DM, CP, DMD, NDF, and iNDF content, respectively. None of the tested SLR models achieved acceptable prediction accuracies.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
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Forfattere
Gillian Butler Bjørn Egil Flø Flaviana Gottardo Anna Hessle Matthias Koesling Elisabet Nadeau Carsten Malisch Giorgia Riuzzi Tomasz Sakowski Anna Woodhouse Finn Walland Håvard SteinshamnSammendrag
SusCatt considered a wide range of innovations or system comparisons in the 6 countries, all aimed to improve sustainability within European cattle farming. On the whole, these involved reducing production intensity, making greater use of home-grown grass and other forage crops on farms – generally with promising results for beef and dairy production when we considered their potential impact across the 3 pillars of sustainability...
Sammendrag
NIBIO lea stáhtalaš dutkanásahus gos dutket, barget ovdánahttindoaimmaid ja gaskkustit dieđuid mat gustojit vuođđoealáhusaide ja meahcásteapmái.
Sammendrag
NIBIO lea staateles dotkemeinstituhte mij dotkeminie, evtiedimmiebarkojne jïh -bïevnesebæjhkoehtimmine gïehtele mah leah vïedteldihkie aalkoejieliemasse jïh miehtjiesdajveåtnose.