Pre-breeding blood urea nitrogen concentration and reproductive performance of Bonsmara heifers within different management systems

This study investigated the association between pre-breeding blood urea nitrogen (BUN) concentration and reproductive performance of beef heifers within different management systems in South Africa. Bonsmara heifers (n = 369) from five herds with different estimated levels of nitrogen intake during...

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Veröffentlicht in:	Tropical animal health and production 2014-08, Vol.46 (6), p.1023-1030
Hauptverfasser:	Tshuma, Takula, Holm, Dietmar Erik, Fosgate, Geoffrey Theodore, Lourens, Dirk Cornelius
Format:	Artikel
Sprache:	eng
Schlagworte:	Age Factors Animal Husbandry - methods Animal Nutritional Physiological Phenomena - physiology Animals beef cattle Biomedical and Life Sciences Blood Blood Urea Nitrogen body condition Body Constitution - physiology Body Weight - physiology Bonsmara Breeding - methods breeding season Breeding seasons Cattle - blood Cattle - physiology conception Female heifers herds Life Sciences Logistic Models management systems Nitrogen Nitrogen - administration & dosage Pregnancy Proportional Hazards Models regression analysis Regular Articles Reproduction Reproduction - physiology reproductive performance Seasons South Africa ultrasonics Urea urea nitrogen Veterinary Medicine/Veterinary Science Zoology
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