Title:	Reproductive performance as affected by lactation status and body fat in beef cows.
Authors:	GUIMARAES FILHO, C. RAY, D. E.
Affiliation:	CLOVIS GUIMARÂES FILHO, CPATSA; DONALO E. RAY.
Date Issued:	1985
Citation:	Pesquisa Agropecuaria Brasileira, Brasília, DF, v. 20, n. 6, p. 699-705, jun. 1985.
Description:	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 lipe (EBLP) during Phase II did not substantially influencefertility, although a five-fold difference in EBLP was observed (NL0H vs. L-L). Treatment 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%, `3,.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.
Thesagro:	Bovino Lactação Lipídio Produção Animal Reprodução
NAL Thesaurus:	animal production conception lactation reproduction suckling
Keywords:	Concepcao Amamentacao Beff cows Body lipid
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPATSA)