Performance and ruminal function development of young calves fed diets with Aspergillus oryzae fermentation extract

Neonatal Holstein heifer (n = 72) and bull (n = 40) calves were used to study the effects of Aspergillus oryzae fermentation extract (Amaferm) on their performance and on rumen development. The starter diets were formulated to achieve Amaferm consumption of 0, 0.5, 1, or 3 g per calf daily. Calves w...

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Bibliographic Details
Published in:Journal of dairy science 1991-12, Vol.74 (12), p.4326-4336
Main Authors: Beharka, A.A. (Kansas State University, Manhattan), Nagaraja, T.G, Morrill, J.L
Format: Article
Language:English
Subjects:
ACIDE GRAS VOLATIL
ACIDO GRASO VOLATIL
Animal Feed
Animals
Animals, Newborn - physiology
ASPERGILLUS ORYZAE
Aspergillus oryzae - metabolism
BACTERIA
Bacteria - growth & development
Biological and medical sciences
Cattle - growth & development
Cattle - physiology
Colony Count, Microbial
CONTENIDO DE MATERIA SECA
DESTETE
Diet
DIETA
DIGESTION
Eating
Fatty Acids, Volatile - analysis
Female
Fermentation
Food industries
Fundamental and applied biological sciences. Psychology
GAIN DE POIDS
GANANCIA DE PESO
Hydrogen-Ion Concentration
INGESTION DE PIENSO
Male
Milk and cheese industries. Ice creams
PRISE ALIMENTAIRE (ANIMAUX)
Random Allocation
REGIME ALIMENTAIRE
RUMEN
Rumen - microbiology
Rumen - physiology
SEVRAGE
TENEUR EN MATIERE SECHE
TERNERO
VEAU
Weaning
Weight Gain
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Summary:Neonatal Holstein heifer (n = 72) and bull (n = 40) calves were used to study the effects of Aspergillus oryzae fermentation extract (Amaferm) on their performance and on rumen development. The starter diets were formulated to achieve Amaferm consumption of 0, 0.5, 1, or 3 g per calf daily. Calves were fed milk daily and allowed to consume starter and a mixture of alfalfa and bromegrass hay ad libitum. Weaning was when calves consumed 550 g of starter on 2 consecutive d. Weight gain and feed consumption were recorded weekly. Forty of the heifer calves, 10 from each treatment, were selected randomly to study the effects of Amaferm on ruminal fermentative development. Ruminal fluid samples were collected for pH, ruminal fermentation products, and for bacterial enumerations. Overall, Amaferm-supplemented calves were weaned 1 wk earlier than unsupplemented calves. They had higher total VFA, propionate, and acetate concentrations in the rumen than unsupplemented calves. Total anaerobic, hemicellulolytic, and pectinolytic bacterial counts were higher; cellulolytic bacterial counts tended to be higher for the Amaferm-supplemented calves than for controls. In general, Amaferm-supplemented calves had greater ruminal microbial activity than those not fed Amaferm
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(91)78628-1