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.
2015
Sammendrag
Reasons for performing study: Horses may adapt to a wide range of temperatures and weather conditions. Owners often interfere with this natural thermoregulation ability by clipping and use of blankets. Objectives: To investigate the effects of different winter weather conditions on shelter seeking behaviour of horses and their preference for additional heat. Study design: Observational study in various environments. Methods: Mature horses (n=22) were given a free choice test between staying outdoors, going into a heated shelter compartment or into a nonheated shelter compartment. Horse location and behaviour was scored using instantaneous sampling every minute for one hour. Each horse was tested once per day and weather factors were continuously recorded by a local weather station. Results: The weather conditions influenced time spent outdoors, ranging from 52 % (of all observations) on days with mild temperatures, wind and rain to 88 % on days with less than 0°C and dry weather. Shivering was only observed during mild temperatures and rain/sleet. Small Warmblood horses were observed to select outdoors less (34 % of all observations) than small Coldblood horses (80 %). We found significant correlations between hair coat sample weight and number of observations outdoors (ρ = 0.23; P = 0.004). Conclusions: Horses selected shelters the most on days with precipitation and horses changed from a nonheated compartment to a heated compartment as weather changed from calm and dry to wet and windy. Horse breed category affected the use of shelter and body condition score and hair coat weight were associated with voluntary shelter selection.
Sammendrag
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Forfattere
Bente Føreid J. Lehman C. Wuster M BirdSammendrag
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Sammendrag
Nitrogen og fosfor er viktige næringsstoffer for plantevekst og i fôr. Ved siden av produksjonen er det viktig å ha fokus på utnyttelsen, fordi innkjøp gjennom gjødsel eller fôr gir kostnader, og overskudd kan føre til miljøproblem. På 20 melkebruk på Vestlandet ble det beregnet mengde næringsstoff som ble kjøpt inn og næringsstoff som ble solgt. Dermed kunne utnyttelsen beregnes. Resultat viser at det både blant økologisk og konvensjonelt drevne garder var stor forskjell i nitrogen- og fosforeffektiviteten.
Forfattere
Jannes StolteSammendrag
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Forfattere
Trygve S. AamlidSammendrag
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Forfattere
Bruce Talbot Kjell Suadicani Karsten RaaeSammendrag
This report covers some of the work done on the mechanised harvesting of young oak stands for the production of whole tree chips as a bioenergy feedstock. Two thinning methods, a double row thinning and a combined single row and selection thinning were tested. Results showed overall production costs of roughly 7 € GJ-1 delivered into containers at roadside, with a difference of about 1 € GJ-1 between the two methods. As the production cost equated to the maximum delivered sales price, the mobilization of this feedstock would need to be incentivized.