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
Forfattere
Daniel Kwaku Addo Asante Igor A. Yakovlev Carl Gunnar Fossdal Gerrit Frantz Timmerhaus Jouni Partanen Øystein JohnsenSammendrag
Det er ikke registrert sammendrag
Forfattere
Nina JohansenSammendrag
Continuous light is a promising method to reduce the problems with rose powderymildew in greenhouse rose production. The effects of such a light regime on the performance of insect pests on roses have so far not been investigated. In the present study, survival, developmental time, and reproduction during one generation of the greenhouse whitefly, Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae), were characterized on roses, Rosa x hybrida cv. Passion, grown in climate chambers with long-day conditions (L20:D4) or continuous light (L24:D0) at 21 oC and fluctuating relative humidity (mean 74%, range 47–96%). Whiteflies reared under continuous light had lower immature survival and fecundity and shorter female longevity than whiteflies reared under long-day conditions, but immature developmental time was only slightly affected. Life-table analysis showed that the net reproductive rate (Ro) and intrinsic rate of natural increase (rm) were reduced by 85 and 76%, respectively, and the time for the population to double its size (D) was 4.2 times longer under continuous light. Thismean that the whitefly population growth under continuous light was strongly reduced compared with the traditional light regime used in rose production.
Forfattere
Anette Moldestad Ellen Mosleth Færgestad Bernt Hoel Anne Kjersti UhlenSammendrag
Det er ikke registrert sammendrag
Forfattere
Håvard SteinshamnSammendrag
The review confirms that feeding legume silage leads to higher DMI and milk production than grass. White clover is superior to red clover and red clover to lucerne in milk yield relative to intake. Milk fat content is lower on red clover than on grass diets and red clover yield milk with lower protein content than white clover and lucerne. Red clover yields milk with higher proportion of the fatty acids C18:2n-5 and C18:3n-3 than grass and higher content of equol than grass and white clover.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Thirty-two dairy farms in Middle-Norway participated in a field study in 2007 and 2008. Nine organic farms with short-term grassland (SO) were paired with 9 conventional farms with short-term grassland (SC) and 7 organic farms with long-term grassland (LO) were paired with 7 conventional farms with long-term grassland (LC) with regard to proximity and calving pattern. Every second month feed and tanker milk samples were collected from each farm. Data from the Norwegian dairy herd recording system were collected and botanical composition before first cut in 2007 was analysed. Milk samples were analysed for chemical composition, fatty acid composition, vitamin concentration, selenium concentration and phytoestrogen concentration. In this paper results from 2007 are presented. Milk quality was more influenced by production system then grassland system. Higher proportions of SFA and lower proportion of oleic acid in milk from O compared to C may be a future challenge for adjusting feed ratios in organic farming in Norway. Red clover stands for the main botanical effect in this study with strong effect on equol concentrations. The potential health effects of equol should be investigated further.
Forfattere
Hege Nordheim-Viken Harald VoldenSammendrag
It is concluded that the ruminal aNDF degradation characteristics are affected by maturity Stage, and interactions with climatic factors such as temperature and water availability probably interact with maturity stage. Precautions should he made when prediction feed degradation characteristics from multiple regression analyses. (C) 2008 Published by Elsevier B.V.
Forfattere
Steffen Adler Håvard Steinshamn Annette Veberg Dahl Anne Holter Vae Erling Thuen Torstein Garmo Søren Krogh-JensenSammendrag
A continuous grazing experiment with three measurement periods, 3 weeks each, was conducted with 16 Norwegian Red dairy cows in mid lactation to compare milk quality when grazing red clover-grass (R) or botanical diverse pasture (D). The cows were offered either R or D from the start of grazing season in mid May until beginning of September 2008. Milk yield was measured and milk samples were collected in the last week in each period (end of June, beginning of August and end of August). Pasture type had no effect on milk yield and milk content of fat or protein. Cows grazing R had higher proportion of the fatty acids C18:0 (22.41 vs. 9.96, P
Forfattere
Steffen Adler Annette Veberg Dahl Håvard Steinshamn Anne Holter Vae Erling Thuen Torstein H. Garmo Søren Krogh-JensenSammendrag
A continuous grazing experiment with three measurement periods, 3 weeks each, was conducted with 16 Norwegian Red dairy cows in mid lactation to compare milk quality when grazing red clover-grass (R) or botanical diverse pasture (D). The cows were offered either R or D from the start of grazing season in mid May until beginning of September 2008. Milk yield was measured and milk samples were collected in the last week in each period (end of June, beginning of August and end of August). Pasture type had no effect on milk yield and milk content of fat or protein. Cows grazing R had higher proportion of the fatty acids C18:0 (22.41 vs. 9.96, P<0.05) and C18:1t11 (0.58 vs. 0.44 g/100g FAME, P<0.05) and lower proportion of C16:0 (27.83 vs. 30.92, P<0.05) in their milk fat than the cows grazing D. The milk content of ?-tocopherol was higher in milk from R than D (3.01 vs. 2.64 µg/ml, P<0.05). The oxidative stability of the milk lipids were only minor affected by pasture type.
Forfattere
Sissel HansenSammendrag
The objective was to investigate the effect of soil compaction by tractor traffic on N2O emission from soil fertilized with cattle slurry or compound fertilizer with NH4NO3. Soil compaction led to a strong increase in N2O emission in soil fertilized with NH4NO3. In cattle slurry treatments the effects of soil compaction were more ambiguous, but also in treatment cattle slurry the observed N2O emissions increased.