Publications

NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.

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2012

Academic chapter – Grazing preferences of goats in diverse rangeland

Marit Jørgensen, Rebekka M L Helgesen, Margrete Eknæs, ...

Grassland – a European Resource?Proceedings of the 24th General Meeting of the European Grassland Federation Lublin, Poland 3–7 June 2012, 2012, p.219-221

Authors

Marit Jørgensen Rebekka M L Helgesen Margrete Eknæs Jørgen A.B. Mølmann Håvard Steinshamn

Abstract

Norwegian goat milk production is based on summer grazing on diverse forest or alpine rangeland, and the quality of these pastures is important for milk quantity and quality. We used n-alkanes and long chained alcohols found in plant waxes as markers to estimate diet composition in goats grazing on a heterogeneous rangeland during two periods in summer; early (beginning of July) and late (end of August). Some of the goats were fitted with GPS collars that recorded their position. Preliminary results show a diverse diet, where ferns, sedges, blueberry (Vaccinium myrtillis) and birch (Betula pubescens) were preferred in early summer. In late summer the diet was particularly diverse, coinciding with a general decline in plant quality.

Academic chapter – Effect of pasture type compared with hay diet on dairy goat milk production and quality

Håvard Steinshamn, Ragnhild Aabøe Inglingstad, Magnhild Nymo, ...

Grassland – a European Resource?Proceedings of the 24th General Meeting of the European Grassland Federation Lublin, Poland 3–7 June 2012, 2012, p.408-410

Authors

Håvard Steinshamn Ragnhild Aabøe Inglingstad Magnhild Nymo Marit Jørgensen

Abstract

The objective was to examine the effect of pasture type, and of grazing compared with hay feeding, on milk production and quality from dairy goats in early and late grazing season. Eighty goats were grouped according to genotype and lactation, and randomly divided into two groups with approximately 8 weeks difference in kidding date and start of feeding experiment, in Early and Late grazing season. At the start of the feeding experiment the goats were divided into 4 forage-treatment groups: R,forest rangeland pasture; C, cultivated pasture; HH, high quality hay; HL, low quality hay. Group R yielded less milk (1.5 vs. 2.0 kg d–1) and lower milk protein content (32 vs. 33 g kg–1), but higher milk fat (46 vs. 37 g kg–1) and DM content (120 vs. 113 g kg–1) than group C. Free fatty acids (FFA) content in milk was not affected by pasture type. The effects of pasture type on milk yield and milk constituents were similar in early and late grazing season. Grazing resulted in similar milk yield but higher milk fat (42 vs. 34 g kg–1), protein (32 vs. 30 g kg–1) and DM (117 vs. 106 g kg–1) content, and lower content of FFA (0.22 vs. 0.34 mEq L–1) than hay feeding

Academic chapter – Exposure and toxicity of metal and oxide nanoparticles to earthworms

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