Effect of fungal biomass in alfalfa hay on intake and total tract digestion in growing beef calves

Two experiments were conducted to determine effects of fungal biomass (FB) as determined by glucosamine analysis, in alfalfa hay on intake and total tract digestion when fed to growing beef calves. Mycotoxins were not detected in hays used for these experiments. A feedlot trial using 40 weaned Angus...

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Bibliographic Details
Published in:Journal of animal science 1996-06, Vol.74 (6), p.1336-1342
Main Authors: Bossuyt, C.V. (University of Manitoba, Winnipeg, MB, Canada.), Wittenberg, K.M, Crow, G.H
Format: Article
Language:English
Subjects:
ALFALFA
AMINOAZUCARES
AMINOSUCRE
Animal Feed - microbiology
Animal productions
Animals
Biological and medical sciences
BIOMASA
Biomass
BIOMASSE
BOVIN DE BOUCHERIE
Cattle
Cattle - blood
Cattle - growth & development
Cattle - physiology
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
CONTENIDO DE MATERIA SECA
DIGESTIBILIDAD
DIGESTIBILITE
Digestion - physiology
Eating - physiology
ESTEROIDES
FECES
Feeds
FIBRA DE LA DIETA
FIBRE ALIMENTAIRE
FOIN
Food Microbiology
Fundamental and applied biological sciences. Psychology
Fungi
Fungi - growth & development
Fungi - physiology
GANADO DE CARNE
Glucosamine - analysis
HECES
Hematocrit - veterinary
HENO
Hydrocortisone - blood
INGESTION DE PIENSOS
INSTRUMENT DE MESURE
INSTRUMENTOS DE MEDICION
LUZERNE
Male
Medicago sativa - microbiology
Metabolism
MOHO
MOISISSURE
PLASMA SANGUIN
PLASMA SANGUINEO
PRISE ALIMENTAIRE (ANIMAUX)
Random Allocation
SAL
SEL DE CUISINE
STEROIDE
TENEUR EN MATIERE SECHE
TERNERO
Terrestrial animal productions
VEAU
Vertebrates
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Summary:Two experiments were conducted to determine effects of fungal biomass (FB) as determined by glucosamine analysis, in alfalfa hay on intake and total tract digestion when fed to growing beef calves. Mycotoxins were not detected in hays used for these experiments. A feedlot trial using 40 weaned Angus calves (270.2 +/- 9.7 kg) showed that DM intake was not affected (P 0.05) by FB content of the hay diets. No adaptation response was observed when animals with no previous exposure to molded feed were introduced to hay containing various levels of FB. Hematocrit and plasma cortisol levels were not affected (P 0.05) by the presence of FB in the hay. Eight steers were used, in two 4 x 4 Latin squares, for intake and total tract digestibility determinations of two alfalfa hays having similar nutrient profiles but differ in FB concentrations. Hays were fed in long or chopped form. Level of FB did not affect (P 0.05) DM intake or total tract DM digestibility. Neutral detergent fiber and ADF digestibilities were 5.4 and 3.7 percentage units higher (P 0.05), respectively, for hay with a high vs low FB concentration. Forage chopping reduced (P 0.05) DM, NDF, ADF, and CP digestibilities; the effect being similar for the two hay types tested. Results suggest that FB concentrations ranging from 2.9 to 5.5 mg/g of DM do not affect DM intake, however, nutrient digestion can be influenced by molding during field wilting or storage
ISSN:0021-8812
1525-3163
0021-8812
DOI:10.2527/1996.7461336x