Additional feeding during late gestation improves initial litter weight of lactating sows exposed to high ambient temperature
Document title: Additional feeding during late gestation improves initial litter weight of lactating sows exposed to high ambient temperature
Journal: Revista Brasileira de Zootecnia
Database: PERIÓDICA
System number: 000444195
ISSN: 1516-3598
Authors: 1
2
2
2
2
1
2
2
Institutions: 1Rural Development Administration, Swine Science Division, Cheonan, Chungnam. Corea del Sur
2Kangwon National University, College of Animal Life Sciences, Chuncheon, Gangwon. Corea del Sur
Year:
Volumen: 48
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English 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
Disciplines: Medicina veterinaria y zootecnia
Keyword: Porcinos,
Nutrición animal,
Cerdas,
Grasa dorsal,
Gestación,
Estrés calórico,
Rasgos reproductivos
Keyword: Swine,
Animal nutrition,
Sows,
Backfat thickness,
Gestation,
Heat stress,
Reproductive traits
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