Effect of roasted soybeans and corn on performance and ruminal and blood metabolites of dairy calves

• Published in: Journal of dairy science 1996-03, Vol.79 (3), p.465-474
• Main Authors: Abdelgadir, I.E.O, Morrill, J. L, Higgins, J. J
• Format: Article
• Language: English
• Subjects: acide gras volatil; acido graso volatil; age; alimentacion de los animales; alimentation des animaux; Animal Feed; animal feeding; Animal productions; Animals; Animals, Newborn - physiology; Biological and medical sciences; blood composition; Blood Glucose - metabolism; blood plasma; body condition; body measurements; calves; Cattle - blood; Cattle - physiology; composicion aproximada; composicion de la sangre; composition du sang; composition globale; condicion corporal; contenido de nitrogeno; destete; Eating; edad; efficacite alimentaire; eficiencia de conversion del pienso; etat corporel; Fatty Acids, Nonesterified - blood; Fatty Acids, Volatile - metabolism; feed conversion efficiency; feed intake; Female; fluide du rumen; fluido del rumen; Fundamental and applied biological sciences. Psychology; gain de poids; ganancia de peso; Glycine max; grillage; Hot Temperature; ingestion de piensos; Lactates - blood; Lactates - metabolism; Lactic Acid; mais; maiz; maize; Male; medicion del cuerpo; mensuration corporelle; nitrogen content; plasma sanguin; plasma sanguineo; prise alimentaire animaux; proximate composition; roasting; Rumen - metabolism; rumen fluid; sevrage; Sex Characteristics; soja; soybean meal; soybeans; teneur en azote; ternero; Terrestrial animal productions; tortas de soja; tostado; tourteau de soja; Urea - blood; veau; Vertebrates; volatile fatty acids; Weaning; Weight Gain; Zea mays
• ISSN: 0022-0302; 1525-3198
• DOI: 10.3168/jds.S0022-0302(96)76387-7

Newborn Holstein calves (n = 132) were used to evaluate three protein sources (soybean meal and soybeans roasted to an exit temperature of 138 or 146 degrees C) that contained 30, 45, or 52% RUP, respectively. Each was used with either raw corn or corn roasted to an exit temperature of 135 degrees C. Roasting of corn increased starch gelatinization from 34.8 to 118.6 mg of maltose equivalents/g of sample. Six pelleted isonitrogenous calf starters (18% CP) were fed for ad libitum consumption from 0.5 to 8 wk of age. Performance of calves fed soybeans roasted at 146 degrees C plus raw corn was superior to that of calves fed soybean meal plus raw corn but was similar to the performance of calves fed soybean meal plus roasted corn. Roasted corn tended to improve calf performance when used with soybean meal and, to a lesser degree, when used with soybeans roasted at 138 degrees C but depressed performance when used with soybeans roasted at 146 degrees C. Ruminal concentrations of NH3, butyrate, and total VFA and plasma concentrations of urea were higher for calves fed soybean meal. Ruminal pH and lactate, plasma NEFA, and blood BHBA concentrations were unaffected by starter. Performance was superior when calves consumed protein and corn sources with similar degrees of ruminal availability.