Effect of yeast on feed intake and performance of cows fed diets based on corn silage during early lactation

• Published in: Journal of dairy science Vol. 81; no. 5; pp. 1345 - 1352
• Main Authors: Wohlt, J.E. (Rutgers-The State University, New Brunswick, NJ.), Corcione, T.T, Zajac, P.K
• Format: Journal Article
• Language: English
• Published: Savoy, IL Am Dairy Sci Assoc 01.05.1998; American Dairy Science Association
• Subjects: Animal Nutritional Physiological Phenomena; Animal productions; Animals; Biological and medical sciences; BLOOD PLASMA; BODY CONDITION; BODY WEIGHT; Cattle - physiology; CONDICION CORPORAL; CONTENIDO DE LIPIDOS; CONTENIDO PROTEICO; DAIRY COWS; Diet; Dietary Proteins - administration & dosage; DIGESTIBILIDAD; DIGESTIBILITE; DIGESTIBILITY; Digestion; Eating; ENSILADO; ENSILAGE (PRODUIT); ETAT CORPOREL; FEED INTAKE; Feeding. Feeding behavior; Female; Fundamental and applied biological sciences. Psychology; GRASA DE LA LECHE; HEMATOCRIT; INGESTION DE PIENSOS; INSTRUMENT DE MESURE; INSTRUMENTOS DE MEDICION; LACTACION; LACTATION; Lactation - physiology; LACTATION STAGE; LEVADURA; LEVURE; LIPID CONTENT; MAIS; MAIZ; MAIZE; MATIERE GRASSE DU LAIT; MEASURING INSTRUMENTS; MILK FAT; MILK PROTEIN; MILK YIELD; Nitrogen - administration & dosage; NITROGEN RETENTION; Nutritional Requirements; PESO CORPORAL; PLASMA SANGUIN; PLASMA SANGUINEO; POIDS CORPOREL; PRISE ALIMENTAIRE (ANIMAUX); Probiotics; PROTEIN CONTENT; PROTEINAS DE LA LECHE; PROTEINE DU LAIT; RENDEMENT LAITIER; RENDIMIENTO LECHERO; RETENCION NITROGENADA; RETENTION AZOTEE; Saccharomyces cerevisiae; SILAGE; TENEUR EN LIPIDES; TENEUR EN PROTEINES; Terrestrial animal productions; UREA; UREE; VACAS LECHERAS; VACHE LAITIERE; Vertebrates; Vertebrates: anatomy and physiology, studies on body, several organs or systems; YEASTS; Zea mays; Performance evaluation; Lactation; Animal feeding; Dairy cattle; Ox; Cow; Vertebrata; Food yeast; Mammalia; Food intake; Female; Cow milk; Chemical composition; Artiodactyla; Ungulata; Food supplement; Digestibility
• ISSN: 0022-0302; 1525-3198
• DOI: 10.3168/jds.s0022-0302(98)75697-8

Thirty-six multiparous Holstein cows were fed a mixture of corn silage and concentrate [1:1; dry matter (DM) basis] and long hay (0.9 kg/d) through wk 18 of lactation. Beginning at 30 d prepartum through wk 4 of lactation, the total mixed rations of 18 of these cows were top-dressed daily with 10 g of Biomate Yeast Plus (Chr. Hansen's, Inc., Milwaukee, WI). The other 18 cows served as controls. At wk 5, both control and treated cows were divided into three groups and fed 0, 10, or 20 g/d of yeast. Yeast supplementation during early lactation significantly improved DM intake, milk yield, and the digestibility of crude protein and acid detergent fiber. Least squares means for DM intake, fat-corrected milk yield, crude protein digestibility, and acid detergent fiber digestibility for cows fed 0, 10, 20 g/d of yeast during wk 5 to 18 of lactation were 23.8, 24.7, and 25.0 kg/d; 37.7, 40.7, and 41.4 kg/d; 78.5, 80.8, and 79.5%; and 54.4, 60.2, and 56.8%, respectively. Although numerical responses in DM intake and milk yield were greater for cows fed 20 g/d of yeast than for cows fed 10 g/d of yeast, the response was not significant