Fecal Consistency as Related to Dietary Composition in Lactating Holstein Cows

A trial was designed to study the relationships of dietary fiber and protein percentage and source to fecal consistency in lactating cattle. Thirty Holstein cows were assigned randomly to one of six TMR through four 21-d periods. The TMR were formulated to contain 17 or 25% ADF and CP of 15 or 22% w...

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Bibliographic Details
Published in:Journal of dairy science 1993-04, Vol.76 (4), p.1074-1082
Main Authors: Ireland-Perry, R.L., Stallings, C.C.
Format: Article
Language:English
Subjects:
ADDITIF
ADITIVOS
ALFALFA
ALIMENT POUR ANIMAUX
Animals
Biological and medical sciences
CARBOHIDRATOS
Cattle
CONTENIDO DE MATERIA SECA
Diet
diet composition
DIETA
Dietary Fiber - administration & dosage
Dietary Proteins - administration & dosage
ENSILADO
ENSILAGE (PRODUIT)
fecal consistency
fecal starch
FECES
Feces - chemistry
Female
FIBRA DE LA DIETA
FIBRE ALIMENTAIRE
Food industries
Fundamental and applied biological sciences. Psychology
GLUCIDE
HECES
Hydrogen-Ion Concentration
Lactation
LUZERNE
MAIS
MAIZ
Medicago sativa
Milk and cheese industries. Ice creams
Milk Proteins - analysis
PIENSOS
PROTEINAS
PROTEINE
REGIME ALIMENTAIRE
Silage
Starch - analysis
TENEUR EN MATIERE SECHE
VACAS LECHERAS
VACHE LAITIERE
Zea mays
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Summary:A trial was designed to study the relationships of dietary fiber and protein percentage and source to fecal consistency in lactating cattle. Thirty Holstein cows were assigned randomly to one of six TMR through four 21-d periods. The TMR were formulated to contain 17 or 25% ADF and CP of 15 or 22% with soybean meal supplementation or 22% with a combination of corn gluten and soybean meals. Two forage combinations were corn silage with or without alfalfa. Fecal consistency was evaluated using a four-point visual observation scale. Lower dietary fiber reduced fecal pH, score, NDF, and ADF but increased fecal DM and starch. A higher percentage of soybean meal lowered fecal DM and fecal score. Forage source affected fecal DM, NDF, ADF, and starch, but not pH or score. Prediction of fecal score from dietary components and cow parameters resulted in dietary DM percentage and 4% FCM as the most related variables. Accurate prediction of fecal consistency score from dietary and cow parameters was not possible.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(93)77436-6