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Effects of the weaning age of calves on somatic development and on reproductive performance of beef cows R. Bras. Zootec.
Vaz,Ricardo Zambarda; Lobato,José Fernando Piva.
This study evaluated body development and reproductive performance of beef cows whose calves were submitted to early weaning (76 days of age), or conventional weaning (148 days of age). It was used 141 Braford cows that calved in 2004, 2005, and 2006 to evaluate weight at calving at 76 days, weight at calving at 148 days, weight at the beginning and end of the breeding season, variation of the average daily weight, body condition, pregnancy rate, and calving interval. Dams of calves weaned at 148 days of age showed daily weight gain higher body weight and better body condition at 148 days of age. The weights at the end of breeding season and average weight gain during the breeding season were higher in early weaning cows than in conventional cows....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body condition; Braford; Conventional weaning; Early weaning; Weight gain.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000500016
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Productivity and efficiency of cow herds submitted to two weaning ages R. Bras. Zootec.
Vaz,Ricardo Zambarda; Lobato,José Fernando Piva; Restle,João.
It was aimed in this work to evaluate the productivity and efficiency of beef cows submitted to weaning of their calves at 76 days (early weaning) or at 148 days (weaning at conventional age) after calving during three consecutive years. It was evaluated pregnancy rate, birth and weaning, gain weight of the calves and cows at conventional weaning, weight at conventional weaning of calves and cows, production of weaned calves per cow and calf production index. Pregnancy rate in the herd submitted to early weaning (86.34%) was higher than in the conventional weaning (55.5%). Early weaning cows showed higher birth and weaning rates when compared to conventional weaning (83.6 and 83.6% vs. 47.5 and 44.5%, respectively) besides a higher production of calves...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conventional weaning; Early weaning; Index of calf production; Weaning rate; Weight gain.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800030
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