Supplementation of rangeland primiparous Bos indicus x Bos taurus beef heifers during lactation. 1. Effects on dam milk production and liveweight, bull calf growth, live carcass characteristics and metabolic hormone concentrations

The practice of feeding replacement-breeding bulls on high energy diets after weaning to meet liveweight (LW) and carcass expectations between 18 and 24 months of age negatively affects reproductive potential. This experiment reports upon the effects of an alternative management strategy aimed at im...

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Veröffentlicht in:	Theriogenology 2020-08, Vol.152, p.69-82
Hauptverfasser:	Callaghan, M.J., Rodgers, R.J., Perry, V.E.A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal Feed - analysis Animal Husbandry - methods Animals artificial insemination beef cattle blood Blood Urea Nitrogen Body Composition body weight Bulls Calfhood nutrition calves carcass characteristics Cattle - physiology Dietary Proteins - administration & dosage Dietary Proteins - pharmacology Dietary Supplements energy Eye muscle area Fatty Acids, Nonesterified - blood feeding level Female free fatty acids grazing heifers Hormones - blood hybrids IGF-I insulin-like growth factor I lactation Lactation - physiology Leptin Male milk yield muscles natural mating nutritional adequacy Parity parturition pastures Pregnancy progeny rain rangelands rearing Santa Gertrudis Supplementation urea nitrogen vegetable protein weaning zebu
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