Data/hora: 10/06/2024 18:28:19

Provedor de dados: | 63
País: | Brazil
Título: | The effect of feed supplementation on the onset of puberty in Brazilian dairy heifers
Autores: | Meirelles,C.F.; Abdalla,A.L.; Vitti,D.M.S.S.
Data: | 1994-08-01
Ano: | 1994
Palavras-chave: | Heifers; Puberty; Protein supplementation; Antihelmintic.
Resumo: | Most Brazilian dairy production is conducted by small holders whose general management skills and feeding programs are often deficient. One common problem directly attributed to underfeeding is that heifers rarely reach sexual maturity before 15 months of age. Groups of growing heifers were treated to detect the effects of protein supplementation and antihelmintic treatment on sexual maturity. The first ovulation occurred at 513 ± 44 and 573 ± 36 days (P&lt;.01) in supplemented and control groups, respectively. Liveweight gains from start of the trial to the first ovulation were 378 ±.02 and 331 ±.04 g for suplemented (S) and control (C) groups. Only 52.17 % of heifers in C group (11 of 23) but 95.65 % in S group (22 of 23) reached sexual maturity before the age of 18 mo (P&lt; .01). Animals with anthelmintic treatment had better growth performance than the controls.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000200026
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90161994000200026
Formato: | text/html
Fonte: | Scientia Agricola  v.51 n.2 1994
Fonte: | info:eu-repo/semantics/openAccess