Data/hora: 01/06/2024 23:33:12

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 10/08/1995
Data da última atualização: | 10/08/1995
Autoria: | SMITH JUNIOR, L. E.; VINCENT, C. K.
Título: | Effects of early weaning and exogenous hormone treatment on bovine postpartum reproduction.
Ano de publicação: | 1972
Fonte/Imprenta: | Journal of Animal Science, v.35, n.6, p.1228-1232, 1972.
Idioma: | Inglês

Conteúdo:

Seventy-nine lactating cows were assigned to one of four treatment groups: (1) early weaning of calves (30 days postpartum), (2) early weaning and hormone theraphy, (3) suckling calves throughout the experiment and (4) suckling calves and hormone therapy.
The hormone therapy was initiated at 30 days post-calving and consisted of a progestogen implant combined with injections of FSH-P and an injection of estradiol-17B. The cows were with fertible bulls for 70 days (30 to 100 days postpartum). The hormone treatment increased (P<.05) the proportion of cows  exhibiting estrus and reduced the interval from parturition to first estrus (P<.05). Early weaning also decreased the interval to first estrus (P<.01). An interaction (P<.10) was dected between the effects of weaning and hormone
theraphy on the first service conception rate and the interval from calving to conception.
Hormone theraphy reduced the conception rate to first service of early-weaned cows and 
lengthened the interval to conception. However, in the sucklend cows, the hormone treatment increased the conception rate to first service and shortened the interval to conception.

Palavras-Chave: | Bovine; Hormone treatment; Postpartum; Tratamento de hormonio.
Thesagro: | Bovino; Desmama; Pós-Parto; Reprodução.
Thesaurus Nal: | reproduction; weaning.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (29130-1) - ADD - SP - -- - SP0797 -  - 0797 - DIS