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.
2006
Sammendrag
The effect of clover species and level of concentrate supplementation on milk fatty acid (FA) composition has been studied. White (WC) and red clover (RC) grown in mixture with grasses were preserved in round bales and fed to autumn calving dairy cows during the first 10 weeks of lactation. Milk FA was higher in linolenic acid, vaccenic acid and rumenic acid for RC than for WC silage (0.90 vs. 0.79 %, 1.52 vs. 1.36 %, 0.90 vs. 0.75 % for these 3 FA, respectively), and RC silage gave a higher n-3/n-6 milk FA ratio than WC (0.98 vs. 0.72). Concentrate supplementation decreased the level of vaccenic acid (1.21 vs. 1.68 %), linolenic acid (0.63 vs. 1.05 %) and the n-3/n-6 ratio (0.55 vs. 1.16) as compared with no supplementation, and the effect of supplementation was similar for the two silages
Sammendrag
The effect of clover species and level of concentrate supplementation on milk fatty acid (FA) composition has been studied. White (WC) and red clover (RC) grown in mixture with grasses were preserved in round bales and fed to autumn calving dairy cows during the first 10 weeks of lactation. Milk FA was higher in linolenic acid, vaccenic acid and rumenic acid for RC than for WC silage (0.90 vs. 0.79 %, 1.52 vs. 1.36 %, 0.90 vs. 0.75 % for these 3 FA, respectively), and RC silage gave a higher n-3/n-6 milk FA ratio than WC (0.98 vs. 0.72). Concentrate supplementation decreased the level of vaccenic acid (1.21 vs. 1.68 %), linolenic acid (0.63 vs. 1.05 %) and the n-3/n-6 ratio (0.55 vs. 1.16) as compared with no supplementation, and the effect of supplementation was similar for the two silages
Forfattere
Michelle de Chantal Kjersti Holt Hanssen Aksel Granhus Urban Bergsten Mikaell Ottosson-Löfvenius Harald GripSammendrag
Det er ikke registrert sammendrag
Sammendrag
The semi-natural salt marshes in Norway have probably been used as pastures for cattle, horses and sheep, as long as there have been domestic animals in Norway. Due to regular flooding, the salt marshes are nutrient rich and high production is maintained without fertilizing. Today, the biodiversity of the salt marshes is threatened due to land drainage, cultivation, development, and pollution, or due to cessation of grazing and overgrowth. The results of this study clearly show that the semi-natural vegetation types found in 1974 and in 1985, and the wading bird population found in 1975/1976, are drastically reduced due to cessation of grazing. To re-establish and maintain some of the salt marshes and the biodiversity, restoration and management is necessary.
Forfattere
Nina Heiberg Roald LundeSammendrag
Formålet med forsøkene var å finne frem til egnet vekstsubstrat for hageblåbær ved karplanteproduksjon i veksthus. I det første forsøket ble ulike blandinger med torv (60 %), furubark (10 eller 35 %) og perlite (0 eller 25 %) + sand (5%) sammenlignet. Balndinger med 35 % furubark gav best rotutvikling, ellers var det ikke signifikant forskjeller. I neste forsøk ble en blanding med 35 % furubark sammenlignet med et kommersielt vekstmedium (Klasmann Container Fibre Substrate plus 20 % wood fibre). Det ble ikke funnet noen signifikante forskjeller. Både Bluecrop og Nui ser ut til å være egnet for karplanteproduksjon i veksthus. Bluecrop gav til sammen 3, 26 kg/m2 avling på tre år.
Sammendrag
In the Nordic countries several composting plants for source separated organic household waste (SSOW) have experiences problems with establishment of high-rate respiration processes. The problems with start-up of the high-rate composting phase can be related to sensitivity of the thermophilic microflora to low pH in the composting material. Low pH is caused by high content of organic acids produced by fermenting microorganisms in the waste. In our studies we investigated the effect of different ratio of SSOW mixed with bulking agent in the development of short organic acid content and the shift from a fermentative to aerobic bacteria population during composting.
Forfattere
Roald AasenSammendrag
In the Nordic countries several composting plants for source separated organic household waste (SSOW) have experiences problems with establishment of high-rate respiration processes. The problems with start-up of the high-rate composting phase can be related to sensitivity of the thermophilic microflora to low pH in the composting material. Low pH is caused by high content of organic acids produced by fermenting microorganisms in the waste. In our studies we investigated the effect of different ratio of SSOW mixed with bulking agent in the development of short organic acid content and the shift from a fermentative to aerobic bacteria population during composting.
Forfattere
Grete Waaseth Roar Moe Royal D. Heins Svein GrimstadSammendrag
Varying photo thermal ratios (PTR) were supplied to Salvia x superba Stapf "Blaukönigin" during pre-inductive vegetative development with the exception of a short germination period under uniform conditions. In addition, both unvernalized plants and plants receiving a saturating vernalization treatment of 6 weeks at 5 oC were given two photosynthetic photon flux (PPF) levels (50 or 200 µmol m-2 s-1) during subsequent inductive 16-hour long days. There were no effects of PTR treatments during vegetative development on subsequent flowering. However, the higher PPF level during inductive long days significantly accelerated floral evocation in unvernalized plants, lowering the leaf number at flowering. The effect was practically negligent after the vernalization requirement was saturated. In a second experiment, varying periods (4, 7, 10, and 14 days or until anthesis) at a PPF of 200 µmol m-2 s-1 during 20-hour days were given at the beginning of a long day treatment, either with or without preceding vernalization treatment. Flowering percentage increased considerably as the period at 200 µmol m-2 s-1 was extended compared with plants grown at a lower PPF of 50 µmol m-2 s-1. However, the leaf number on flowering plants was not affected, except in unvernalized plants receiving the highest PPF continuously until anthesis, where leaf number was reduced by almost 50%. We propose that the PPF dependent flowering is facilitated either by the rate of ongoing assimilation or rapid mobilization of stored carbohydrates at the time of evocation. Abortion of floral primordia under the lower PPF (50 µmol m-2 s-1) irrespective of vernalization treatment indicates that the assimilate requirement for flower bud development is independent of the mechanism for floral evocation.
Forfattere
Gunn Mari StrømengSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag