Performance of Puruna beef cows subjected to different nursing managements

被引：5
|
作者：
Furmann Moura, Ivan Cesar [1 ]
Kuss, Fernando [2 ]
Moletta, Jose Luis [3 ]
Glazenapp de Menezes, Luis Fernando [2 ]
Henrique, Douglas Sampaio [2 ]
Lipinski, Leandro Cavalcante [1 ]
Martins, Adriana de Souza [1 ]
机构：
[1] Univ Estadual Ponta Grossa, BR-84030900 Ponta Grossa, PR, Brazil
[2] Univ Tecnol Fed Parana, BR-85660000 Dois Vizinhos, PR, Brazil
[3] Inst Agron Parana, BR-84001970 Ponta Grossa, PR, Brazil
来源：
PESQUISA AGROPECUARIA BRASILEIRA | 2014年 / 49卷 / 01期
关键词：
controlled nursing; post-partum anestrus; early weaning; reproductive efficiency; calving interval; fertility rate; REPRODUCTIVE-PERFORMANCE; EFFICIENCY;
D O I：
10.1590/S0100-204X2014000100007
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The objective of this work was to evaluate the weight and reproductive performance of beef cows subjected to different nursing managements. During the breeding season of 85 days, 161 beef cows of the Puruna breed were evaluated, according to the following feeding managements: early weaning, cows separated from their calves at 75 days postpartum; controlled nursing, cows separated from their calves at 75 days of age, but taken to nurse once a day during the breeding season; and conventional weaning, cows kept with their calves until the end of the breeding season, at 160 days of age of calves, in average. Fertility rates were not significantly affected by weaning managements, being 97% for early weaning, 96% for controlled nursing, and 90% for conventional weaning. However, early weaning resulted in lower reproductive efficiency (28.26 kg), when compared to controlled nursing (35.09 kg) and conventional weaning (35.34 kg). Beef cows maintained in good body conditions at birth and at the beginning of the breeding season have a high fertility rate, regardless of calf-feeding management.
引用
收藏
页码：49 / 56
页数：8
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