Zobrazeno 1 - 10
of 13
pro vyhledávání: '"A.M. van Vuuren"'
Publikováno v:
Animal, Vol 7, Iss , Pp 292-302 (2013)
Ruminant production contributes to emissions of nitrogen (N) to the environment, principally ammonia (NH3), nitrous oxide (N2O) and di-nitrogen (N2) to air, nitrate (NO3−) to groundwater and particulate N to surface waters. Variation in dietary N i
Externí odkaz:
https://doaj.org/article/c5fb56bdb2d84ace86c14f7abdc9b5ec
Publikováno v:
The Journal of Agricultural Science 142 (2004) 1
The Journal of Agricultural Science, 142(1), 79-88
The Journal of Agricultural Science, 142(1), 79-88
To assess the effect of grassland management on the ruminal digestion of silages, four lactating dairy cows, fitted with a rumen cannula, were fed diets consisting of concentrates and different grass silages. The grass silages consisted of intensivel
Publikováno v:
Journal of Dairy Science, 82, 1008-1018
Journal of Dairy Science 82 (1999)
Journal of Dairy Science 82 (1999)
The present study was designed to describe the relationship between mineral metabolism and urine production by lactating dairy cows. Regression studies were performed to predict urine volume from either observed concentrations of K, Na, and N in urin
Publikováno v:
Journal of Dairy Science. 76:2982-2993
Three rumen fermentation studies in combination with three feeding trials were carried out to investigate the effect of partial replacement of heavily fertilized perennial ryegrass by low protein feedstuffs on pH and concentrations of VFA and NH3 N i
Publikováno v:
Animal Feed Science and Technology. 38:35-42
Samples of a totally mixed ration and of soybean hulls were incubated in nylon bags in the rumen of four cows. Incubation times were 3, 6, 12, 24, 48 and 280 h. The 3- to 48-h incubations and determination of solubility were repeated in seven periods
Publikováno v:
Netherlands Journal of Agricultural Science, 38, 499-512
Netherlands Journal of Agricultural Science 38 (1990)
Netherlands Journal of Agricultural Science 38 (1990)
Rumen degradabilities of crude protein and non-protein organic matter of fresh and preserved herbage, obtained with nylon bag studies, were compared and consequences for dairy cow rations discussed. Results from 4 experiments indicate that fresh and
Publikováno v:
Journal of Dairy Science 82 (1999)
Journal of Dairy Science, 82, 143-152
Journal of Dairy Science, 82, 143-152
The interaction between the quality of grass silage and starch supplementation on ruminal digestion was studied in an experiment with a 2 x 2 factorial design using four dairy cows. Treatment factors were grass silage harvested after either 21 or 37
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f04bb9a4f02aeb2d5f7b90d2b422335f
https://research.wur.nl/en/publications/starch-and-stage-of-maturity-of-grass-silage-site-of-digestion-an
https://research.wur.nl/en/publications/starch-and-stage-of-maturity-of-grass-silage-site-of-digestion-an
Publikováno v:
British Journal of Nutrition 78 (1997) 4
British Journal of Nutrition, 78(4), 563-581
British Journal of Nutrition, 78(4), 563-581
Mechanistic rumen models of Baldwin (1995), Danfæer (1990) and Dijkstra et al. (1992) were compared on identical inputs that were derived from trials with lactating dairy cows fed on grass herbage. Consistent differences were detected between models
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7ad0387c4b30cca2e4f59c54da4c1c5
https://research.wur.nl/en/publications/comparison-and-evaluation-of-mechanistic-rumen-models
https://research.wur.nl/en/publications/comparison-and-evaluation-of-mechanistic-rumen-models
Publikováno v:
Journal of dairy science. 75(8)
An experiment was carried out to study digestion and intestinal AA in three ruminally and duodenally cannulated, lactating cows fed freshly cut grass ( Lolium perenne ) fertilized with 500 and 275k of Nha per yr, respectively. High N grass was fed in
Publikováno v:
Livestock Production Science 6 (1979)
The effect of the level of feed intake on the quantity of protein entering the small intestine was studied in re-entrant cannulated dairy cows fed mixed diets with varying N contents. The degradation of dietary protein in the forestomachs was estimat