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Provedor de dados:  R. Bras. Zootec.
País:  Brazil
Título:  Additional feeding during late gestation improves initial litter weight of lactating sows exposed to high ambient temperature
Autores:  Choi,Yo Han
Kim,Min Ju
Kim,Kwang Yeol
Lee,Jun Hyung
Kim,Young Hwa
Kim,Jin Soo
Chae,Byung Jo
Data:  2019-01-01
Ano:  2019
Palavras-chave:  Backfat thickness
Gestating sows
Heat stress
Reproductive traits
Resumo:  ABSTRACT The present study investigated the impacts of additional feeding (AF; containing 16% excess feed than control diet in the last two weeks of gestation) during late gestation period and different backfat thickness (BFT) including low (<20 mm) and high (≥20 mm) backfat on reproductive performance, litter size, blood metabolites, hormonal profiles, colostrum, and milk composition of sows from day 90 of gestation to farrowing, and from farrowing to weaning during summer (average 28.3 °C). Fifty-four crossbred sows (Yorkshire × Landrace) were allotted to one of four treatments according to a 2×2 factorial arrangement. There was no AF×BFT interaction for any of the measured variables. The body weight change of sows was decreased for <20 mm in BFT and AF treatments during late gestation and farrowing to weaning periods. The BFT change of sows was higher in AF during late gestation and higher in ≥20 mm BFT during late gestation and farrowing to weaning periods. There were no effects of AF and BFT on the average daily feed intake and weaning-to-oestrus interval; however, sows in AF groups had a greater litter uniformity at birth and initial litter weight. Hormone profiles, colostrum, and milk composition of sows were not different among the treatments. Additional feeding during the last two weeks of gestation increases initial litter size in summer; however, final litter weight is not affected.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Zootecnia
Relação:  10.1590/rbz4820180028
Formato:  text/html
Fonte:  Revista Brasileira de Zootecnia v.48 2019
Direitos:  info:eu-repo/semantics/openAccess

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