BDPA - Bases de Dados da Pesquisa Agropecuária Embrapa

Registro Completo
Biblioteca(s):  Embrapa Pantanal.
Data corrente:  07/10/1996
Data da última atualização:  03/04/2017
Título:  Postpartum weight and body condition loss and performance of fall-calving cows.
Ano de publicação:  1986
Fonte/Imprenta:  Theriogenology, v.26, n.4, p.461-473, Oct. 1986.
Idioma:  Inglês
Conteúdo:  A total of 166 mature fall-calving Hereford cows were used to study the effects of weight and body condition losses on the reproduction of cows and on the performance of their calves. This study was conducted before and during the breeding season over a 3-yr period. The cows calved in a good body condition and were assigned to one of the following treatment groups: the MM group to maintain weight from calving (September - October) throught breeding (December - January), the LM group to lose up to 10% of the postpartum weight from calving to the beginning of breeding and to maintain the weight during breeding, and the ML group to maintain weight from calving to the beginning of breeding and to, lose 10 - 15% of the postpartum weight during breeding. Weight losses were ajhusted by altering daily amounts of protein supplement and forage. Cows in the LM treatment group lost 3, 17 and 6% of their postpartum weight before breeding in yr 1, 2, and 3, respectively, and they had a 10-d longer (P<0.05) interval from calving to first estrus than MM or ML group cows. The percentage of cows with ovarian activity at the begginning of breeding was reduced (37 vs 64% P<0.01) for LM compared with MM cows. Treatment-by-year interactions were significant for pregnancy rate and ovarian activity at the end of breeding. In Year 1, ML cows lost 14% of portpartum weight during breeding and had reduced (P<0.01) pregnancy rates compared with MM or LM cows (50 vs 79 and 88%). Only 41% of ML cows in Ye... Mostrar Tudo
Palavras-Chave:  Fall calving.
Thesagro:  Gado de Corte; Reprodução.
Thesaurus NAL:  beef cattle; body condition; reproduction; weight loss.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Pantanal (CPAP)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status
CPAP33137 - 1ADDSP - PPSP1501215012


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