Effects of Low Energy Diets Followed by a Compensatory Diet on Body Weight Gain and Plasma Hormone Concentrations in Bull Calves

• Published in: Journal of dairy science 1998-01, Vol.81 (1), p.250-254
• Main Authors: Barash, H., Aharoni, Y., Brosh, A., Holzer, Z.
• Format: Article
• Language: English
• Subjects: ALIMENTACION; ALIMENTACION RACIONADA; ALIMENTATION; ALIMENTATION RATIONNEE; Animal Nutritional Physiological Phenomena; Animal productions; Animals; Biological and medical sciences; BLOOD PLASMA; BODY WEIGHT; bull calves; CALVES; Cattle - physiology; COMPENSATORY GROWTH; CONTENIDO DE MATERIA SECA; CRECIMIENTO COMPENSADOR; CROISSANCE COMPENSATOIRE; DIET; DIETA; DRY MATTER CONTENT; EFFICACITE ALIMENTAIRE; EFICIENCIA DE CONVERSION DEL PIENSO; Energy Intake; ENERGY VALUE; FACTEUR DE CROISSANCE IGF; FACTOR DE CRECIMIENTO IGF; FEED CONVERSION EFFICIENCY; FEED INTAKE; FEEDING; Feeding. Feeding behavior; Fundamental and applied biological sciences. Psychology; GAIN DE POIDS; GANANCIA DE PESO; hormones; INGESTION DE PIENSOS; INSULIN; Insulin - blood; INSULIN-LIKE GROWTH FACTOR; Insulin-Like Growth Factor I - metabolism; INSULINA; INSULINE; LIVEWEIGHT GAIN; Male; METABOLIZABLE ENERGY; PESO CORPORAL; PLASMA SANGUIN; PLASMA SANGUINEO; POIDS CORPOREL; PRISE ALIMENTAIRE (ANIMAUX); REFEEDING; REGIME ALIMENTAIRE; RESTRICTED FEEDING; TENEUR EN MATIERE SECHE; TERNERO; Terrestrial animal productions; THYROXINE; Thyroxine - blood; TIROXINA; VALEUR ENERGETIQUE; VALOR ENERGETICO; VEAU; Vertebrates; Vertebrates: anatomy and physiology, studies on body, several organs or systems; WEIGHT GAIN
• ISSN: 0022-0302; 1525-3198
• DOI: 10.3168/jds.S0022-0302(98)75573-0

Holstein bull calves at 138.4 d of age were fed one of four diets that contained 2.28, 2.43, 2.61, or 2.8 Mcal of metabolizable energy/kg of dry matter and 10.8, 11.7, 12.8, or 13.9% crude protein, respectively, for 77 d followed by a diet that contained 2.80 Mcal of metabolizable energy/kg of dry matter and 13.9% CP. During the energy restriction period, the metabolizable energy of the diets was positively correlated with the plasma concentration of insulin-like growth factor-I, which was positively correlated with daily body weight (BW) gain during this period and the plasma concentration of total thyroxin. During the first 37 d of the realimentation period, compensatory growth occurred, and the rate of increase in plasma concentrations of insulin-like growth factor-I was positively correlated with that of daily BW gain. At d 37 of the compensatory period, the mean plasma concentration of total thyroxin in calves in three of the four groups did not differ significantly; only the concentration of total thyroxin in the plasma of calves fed the highest energy restricted diet was significantly higher. The mean BW of calves in groups fed the high energy diets during the restriction period tended to be heavier even after 158 d of the realimentation period.