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.
2023
Sammendrag
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Forfattere
Odd Arne Rognli Akhil Reddy Pashapu Mallikarjuna Rao Kovi Marit Jørgensen Sigridur Dalmannsdottir Trygve S. Aamlid Ievina Sturite Therese Mæland Kristoffer Herland Hellton Thordis Linda Thorarinsdottir Helga Amdahl Muath K Alsheikh Susanne WindjuSammendrag
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Forfattere
Odd Arne Rognli Trygve S. Aamlid Muath K Alsheikh Helga Amdahl Sigridur Dalmannsdottir Kristoffer Herland Hellton Marit Jørgensen Mallikarjuna Rao Kovi Therese Mæland Akhil Reddy Pashapu Ievina Sturite Thordis Linda Thorarinsdottir Susanne Skinnehaugen WindjuSammendrag
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Forfattere
Lars T. HavstadSammendrag
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Sammendrag
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Forfattere
Karin Juul Hesselsøe Anne Friederike Borchert Karin Normann Trygve S. Aamlid Pia Heltoft ThomsenSammendrag
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Forfattere
Martha Irene Grøseth Linda Karlsson Håvard Steinshamn Marianne Johansen Alemayehu Kidane Egil PrestløkkenSammendrag
A continuous production experiment was conducted in Norway with 48 Norwegian Red dairy cows in early- to mid-lactation, to investigate the effect of grass silage with lactic acid bacteria (LAB) or formic acid (FA) additives, on milk yield (MY) and milk protein yield (MPY). Grass wilted to 250 g dry matter (DM)/kg was inoculated with homofermentative LAB to obtain LAB silage, whilst FA silage was produced adding a FA-based additive. The two silages were fed ad libitum and supplemented with an average 10.3 kg of either high (H) or low (L) metabolizable protein (MP) concentrates, in a 2 ✗ 2 factorial arrangement of treatments. The treatments were LAB silage and L concentrate, LAB silage and H concentrate, FA silage and L concentrate and FA silage and H concentrate. The use of FA resulted in lower levels of residual water-soluble carbohydrates (WSC), and higher levels of ammonia nitrogen (NH3single bondN), compared to LAB. In situ results for FA silage showed lower rumen degradability of crude protein (CP), while gas in vitro results showed lower utilizable CP (uCP), compared to LAB silage (782 vs. 750 g/kg DM and 128 vs. 119 g/kg DM, respectively). The purine over creatinine (PDC) index did not indicate any effects on the microbial protein synthesis (MPS) from any of the treatments. The higher daily intake of FA silage (12.5 vs.13.7 kg DM for LAB and FA, respectively, P < 0.001), did not result in significant differences in daily MY (31.0 vs. 30.2 kg, P = 0.208), nor MPY (1.08 vs.1.07 kg/day, P = 0.878) for LAB and FA, respectively. Feeding H concentrate gave higher MPY (P = 0.036), higher urea in milk (P < 0.001), plasma (P < 0.001) and urine (P = 0.008) and tended to give higher MY (P = 0.063) for both silages. For amino acids (AA) in plasma, alanine was higher for FA silage than for LAB silage (P = 0.030), while histidine (P = 0.001), leucine (P = 0.015) and glutamine (P = 0.007) were higher for both silages when cows were fed H concentrate. In conclusion, the FA and LAB additives did not affect MY or MPY any differently. Feeding H concentrate resulted in higher MPY for both silages, but reduced nitrogen (N) efficiency.
Sammendrag
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Forfattere
Anne Linn HykkerudSammendrag
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Forfattere
Anne Linn HykkerudSammendrag
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