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.
2013
Forfattere
Matthias KoeslingSammendrag
Det er ikke registrert sammendrag
Sammendrag
The calculation of the embedded energy (EE) of twenty barns shows that there is a considerable variation of EE per cow, where the lowest values were one fourth of the highest. Use of timber instead of concrete in walls had most effect to reduce the amount of EE. Cold barns can contribute to reduce the amount of EE, while the amount of EE is higher in free-stall than in tie-stall barns. While for an existing building the amount of EE is nearly fixed, calculating the anticipated amount for a new building can help to reduce energy use in agriculture and thus contribute to a more sustainable production. Incorporating EE in planning new buildings should be of special importance for organic farming, since regulations demand more area per animal than in conventional farming. In addition to building new, renovation, extension as well as recycling of building materials should be considered. Planning new buildings should also include operational energy, as well as working conditions, animal welfare and economic considerations.
Forfattere
Matthias KoeslingSammendrag
Nitrogen balances on farm Level for Dairy farms in the coastal region of Norway.
Sammendrag
Nitrogen (N) efficiency on farm gate is studied for 2010 on ten Norwegian, organic dairy farms and ten conventional as references. Preliminary results are presented here, and the method is discussed. N-efficiency is calculated as Net N-Export (kg) / Net N-Import (kg). Nitrogen from biological N-fixation had a large impact on calculated N-efficiency. Because of large yearly variations and very uncertain estimates of amount of N from biological N-fixation caused by uncertainties in roughage yields, clover content and the amount of nitrogen fixed per kg clover harvested, the numeric values on estimated N-efficiency should not be taken as exact values. N-efficiency is estimated with and without biological N fixation. There are large variations in farm size, use of concentrates and milk yield per cow within the group of organic farms. However the variation is even larger within the conventional farms'. On average the estimated N-efficiency were higher on the organic than on the conventional farms. However, there are large variations in estimated N-efficiency within the organic as well as the conventional group. This gives us the possibility to identify on which farms actions should be taken to improve N-efficiency.
Sammendrag
Nitrogen (N) efficiency on farm gate is studied for 2010 on ten Norwegian, organic dairy farms and ten conventional as references. Preliminary results are presented here, and the method is discussed. N-efficiency is calculated as Net N-Export (kg) / Net N-Import (kg). Nitrogen from biological N-fixation had a large impact on calculated N-efficiency. Because of large yearly variations and very uncertain estimates of amount of N from biological N-fixation caused by uncertainties in roughage yields, clover content and the amount of nitrogen fixed per kg clover harvested, the numeric values on estimated N-efficiency should not be taken as exact values. N-efficiency is estimated with and without biological N fixation. There are large variations in farm size, use of concentrates and milk yield per cow within the group of organic farms. However the variation is even larger within the conventional farms'. On average the estimated N-efficiency were higher on the organic than on the conventional farms. However, there are large variations in estimated N-efficiency within the organic as well as the conventional group. This gives us the possibility to identify on which farms actions should be taken to improve N-efficiency.
Forfattere
Matthias KoeslingSammendrag
Det er ikke registrert sammendrag
Forfattere
Grete H. M. JørgensenSammendrag
Det er ikke registrert sammendrag
Forfattere
Grete H. M. JørgensenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Grete H. M. JørgensenSammendrag
Det er ikke registrert sammendrag