Zobrazeno 1 - 10
of 56
pro vyhledávání: '"R.N. Heitmann"'
Autor:
J.L. Klotz, R.N. Heitmann
Publikováno v:
Journal of Dairy Science. 90:1326-1339
Dairy calf weaning is associated with ketone concentrations that exceed the levels occurring in adults, and weaning represents a potential energy loss that may be mitigated by ionophore supplementation. To assess the effects of weaning and ionophore
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61d57e13d8fcc608d9d1308a9484443a
https://doi.org/10.3168/jds.s0022-0302(07)71620-x
https://doi.org/10.3168/jds.s0022-0302(07)71620-x
Publikováno v:
Small Ruminant Research. 45:291-300
Objectives of this study were to determine if the number of cells incubated in primary rumen epithelial cell cultures affects production rates of metabolites and to establish an ideal mode of data expression in order to standardize the reporting crit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::544e4da2b7ec1c8c67abf7bfddcf0621
https://doi.org/10.1016/s0921-4488(02)00117-7
https://doi.org/10.1016/s0921-4488(02)00117-7
Autor:
M. Smuts, Ryszard Puchala, José María Fernández, R.N. Heitmann, T. Sahlu, A. Al-Dehneh, S. G. Pierzynowski
Publikováno v:
Small Ruminant Research. 18:43-49
This experiment was designed to investigate whether circulating mimosine imposes limitations on absorption of amino acids and minerals from the gastrointestinal tract of Alpine goats. Circulating mimosine, portal blood and plasma flow rate, and conce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4068231fb1a37de6a30469c4cc4afed0
https://doi.org/10.1016/0921-4488(95)00698-k
https://doi.org/10.1016/0921-4488(95)00698-k
Publikováno v:
Journal of Dairy Science. 75:2517-2523
Effects of lasalocid (0 or 200 mg/d per head) and undegradable intake protein (32 vs. 42% of CP in concentrate) on growth and body composition were evaluated using 32 Holstein heifers (253 kg initial BW, SE = 4). Heifers were housed in an open barn i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a69bb8d94fe03c545dedd57334d3ffa2
https://doi.org/10.3168/jds.s0022-0302(92)78013-8
https://doi.org/10.3168/jds.s0022-0302(92)78013-8
Publikováno v:
Journal of Dairy Science. 75:2235-2241
Twelve Holstein bull calves were ruminally cannulated at 5 d of age and assigned to 0 or 1mg of lasalocid/kg of BW daily, administered postruminally via milk replacer or into the ruminal cannula. Calves were fed milk replacer for 8 wk and calf starte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea5219397ab2d6fef7e440363d7b2e5b
https://doi.org/10.3168/jds.s0022-0302(92)77984-3
https://doi.org/10.3168/jds.s0022-0302(92)77984-3
Publikováno v:
Journal of Dairy Science. 74:250-257
Effects of weaning age on blood glucose, ketones, and nonesterified fatty acids were examined using 16 Holstein heifer calves. Animals entered the study at 6 +/- 3.5 d of age and were fed 1.8 kg of milk twice daily to 28 (early weaning) or 56 d (late
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::644b66282adf1361aa0baf0b4c3eb5b8
https://doi.org/10.3168/jds.s0022-0302(91)78167-8
https://doi.org/10.3168/jds.s0022-0302(91)78167-8
Autor:
R.N. Heitmann, J.L. Klotz
Publikováno v:
Journal of dairy science. 89(9)
Dairy calf weaning results in blood ketone concentrations in excess of mature rates of use and can result in excretion of ketones in urine representing a loss of energy. Lasalocid is frequently supplemented as an anticoccidial agent in calf starters;
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83d3665a85974165814b9aff42868a72
https://pubmed.ncbi.nlm.nih.gov/16899694
https://pubmed.ncbi.nlm.nih.gov/16899694
Publikováno v:
Journal of dairy science. 84(1)
The objectives of this study were to 1) determine if the number of rumen epithelial cells in primary cell incubation affects the rate of metabolite production, and 2) determine the optimum mode of data expression to standardize reporting criteria. Se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d8cd20d4b98dc22c73ac3043b618997
https://pubmed.ncbi.nlm.nih.gov/11210032
https://pubmed.ncbi.nlm.nih.gov/11210032
Publikováno v:
Journal of dairy science. 75(12)
Sodium bicarbonate and yeast culture effects on ruminal fermentation, intake, and growth were evaluated in young calves. In trail 1, nine ruminally cannulated Holstein calves averaging 12 wk of age were fed control starter (17% CP) or starters contai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e57d611e9b24eb7eeec749d029d7e732
https://pubmed.ncbi.nlm.nih.gov/1335462
https://pubmed.ncbi.nlm.nih.gov/1335462
Publikováno v:
Journal of dairy science. 74(1)
Effects of weaning age on plasma VFA were examined using 16 Holstein heifer calves. Animals entered the study at 6 ± 3.5 d of age and were fed 1.8 kg milk twice daily to 28 (early weaning) or 56 d (late weaning) and a commercial pelleted calf starte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55cbbfe108f6ccad73ff350b3b3648ef
https://pubmed.ncbi.nlm.nih.gov/2030171
https://pubmed.ncbi.nlm.nih.gov/2030171