Data/hora: 05/06/2024 02:27:14

Biblioteca(s): | Embrapa Semiárido; Embrapa Unidades Centrais.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | Nacional - B
Data corrente: | 04/07/1996
Data da última atualização: | 20/03/1998
Autoria: | GUIMARAES FILHO, C.; RAY, D. E.
Título: | Reproductive performance as affected by lactation status and body fat in beef cows.
Ano de publicação: | 1985
Fonte/Imprenta: | Pesquisa Agropecuaria Brasileira, Brasilia, v.20, n.6, p.699-705, jun. 1985.
Idioma: | Inglês
Conteúdo: | Seventy-one mature Brangus cows, 38 nonlactating (NL) and 33 in late stage of lactation (L) were fed for 192 days (Phase I) a low energy diet (L). During Phase II (65 days) 19 NL and 17 L cows were fed a high energy diet (H). The other nonlactating (19) and lactating (16) cows remained on the low energy diet. Energy restriction during Phase I did not affect (P>0.05) cyclic ovarian activity although losses in body weight and condition were substantial. Rapid changes in body weight, condition, and percent empty body lipid (EBLP) during Phase II did not substantially influence fertility, although a five-fold difference in EBLP was observed (NL-H vs.L-L). Treatmente groups did not differ (P>0.05) in conception rate, days from the beginning of the breeding season to breeding and to conception, conception at first service, and number of services per conception. Values observed for these parameters for NL-H, L-H, NL-L; AND L-L groups were respectively: 68.4%, 13.2, 23.3, 36.8%, and 1.68; 82.4%, 12.7, 19.5, 58.8% and 1.29; 68,4%, 10.2, 17.4, 47.4% and 1.41; 68.8%, 12.4, 19.5, 43.7% and 1.50.
Palavras-Chave: | Amamentacao; Beff cows; Body lipid; Concepcao; Lipideo.
Thesagro: | Bovino; Lactação; Lipídio; Produção Animal; Reprodução.
Thesaurus Nal: | animal production; conception; lactation; reproduction; suckling.

Categoria do assunto:

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L Ciência Animal e Produtos de Origem Animal

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/144064/1/7293-1.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)

Exemplares:

AI-SEDE - (19736-1) - UMT - AP - -- - 630.72081 - P474 - 63072081 - DIS
CPATSA - (7293-1) - UPC - AP - PP -  -  -  - DIS