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	Provedor de dados Organic Eprints (4) Autor Brenøe, Ulrik Tutein (4) Steinshamn, Håvard (4) Thuen, Erling (4) Bleken, Marina Azzaroli (1) Ekerholt, Georg (1) Garmo, Torstein H (1) Höglind, Mats (1) Yri, Cecilie (1) Mais... Palavra-chave Dairy cattle (2) Food security (2) Air and water emissions (1) Farming Systems (1) Feeding and growth (1) Food quality and human health Animal husbandry (1) Food quality and human health Dairy cattle Feeding and growth (1) Nutrient turnover (1) Pasture and forage crops (1) Mais... Tipo do documento Journal paper (3) Conference paper, poster, etc. (1) Ano 2007 (1) 2006 (2) 2004 (1) País Germany (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Feed nitrogen conversion in lactating dairy cows on pasture as affected by concentrate supplementation Organic Eprints Steinshamn, Håvard; Höglind, Mats; Garmo, Torstein H; Thuen, Erling; Brenøe, Ulrik Tutein. The effect of concentrate supplementation on nitrogen (N) intake and excretion in grazing lactating dairy cows was determined in three herds in Norway. Grazing trials were conducted with each herd in June and August for two consecutive years. The average supplementation was 1.8 (S.D. 2.1) kg DM/day, and the concentrate was based on grain with a N content ranging from 18.7 to 24 g/kg DM. Herbage DM and N intake were reduced with increasing supplementation, but total DM and N intake increased. Milk yield and protein content increased by 1.1 kg milk and 0.28 g protein per kg milk for each kg extra concentrate. Milk N excretion increased with increasing supplementation (6.5 g N/kg DM), and N utilisation improved by 11.7 g N per kg N intake per kg extra... Tipo: Journal paper Palavras-chave: Dairy cattle; Air and water emissions; Feeding and growth. Ano: 2006 URL: http://orgprints.org/10651/1/Steinshamn_etal_2006_Feed_N_conversion.pdf Clover species in grass-clover silages affects milk fatty acid composition Organic Eprints Steinshamn, Håvard; Thuen, Erling; Brenøe, Ulrik Tutein. The objective of this study was to examine the effect of clover species on milk fatty acid (FA) composition. Lactating dairy cows were allocated to two groups and fed grass-clover silage containing either white clover (WC) or red clover (RC), without or with concentrate supplementation. No significant interaction of clover species with concentrate supplementation could be observed. RC milk had significantly higher proportion of polyunsaturated FAs (P<0.001), particularly C18:3n-3 (P<0.001), and contained a higher n-3/n-6 FA ratio (P<0.05) than WC milk. It is concluded that RC silage, independent of concentrate supply, yielded milk with more beneficial FA composition than WC silage. Tipo: Journal paper Palavras-chave: Food security; Food quality and human health Dairy cattle Feeding and growth. Ano: 2007 URL: http://orgprints.org/10897/1/steinshamn_etal_2007_clover_species_in_grass%2Dclover_silages_affects_milk_fatty_acid_composition.pdf Effect of clover species in grass-clover silages and concentrate supplementation on milk fatty acid composition Organic Eprints Steinshamn, Håvard; Thuen, Erling; Brenøe, Ulrik Tutein. 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, re-spectively), and RC silage gave a higher n-3/n-6 milk FA ratio than WC (0.98 vs. 0.72). Concentrate sup-plementation 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... Tipo: Conference paper, poster, etc. Palavras-chave: Food security; Food quality and human health Animal husbandry. Ano: 2006 URL: http://orgprints.org/7217/3/Steinshamn_paper_milk_quality_revised.doc Utilization of nitrogen (N) and phosphorus (P) in an organic dairy farming system in Norway Organic Eprints Steinshamn, Håvard; Thuen, Erling; Bleken, Marina Azzaroli; Brenøe, Ulrik Tutein; Ekerholt, Georg; Yri, Cecilie. Inputs of N and P, flows through the soil–plant–animal pathway and removals by products were recorded for 3 years at the organically managed prototype dairy farm ‘Frydenhaug’ in Norway to assess the transfer efficiencies of N and P within and at the farm level. Nutrient balances and efficiency (N or P in products divided by N or P in inputs) were compared to data from other studies of dairy farm systems in Europe. Plant production on the farm covered nearly all the needs by the herd. However, about 10% of the plant production was sold as cash crop and about the same amount was bought as feed. At the farm level, ‘Frydenhaug’ realized annually and on average lower surpluses and higher N or P efficiencies than found in most studies concerned. On average, N... Tipo: Journal paper Palavras-chave: Nutrient turnover; Pasture and forage crops; Dairy cattle; Farming Systems. Ano: 2004 URL: http://orgprints.org/2680/1/2680.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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