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Descripción
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| A total of 180 sows (crossbred of Landrace * Duroc x Large White) was used to study the effect of parity (primiparous, PRI, vs. multiparous in the 3rd and 4th reproductive cycle, MUL) on productive performance and posterior fertility. Each treatment was replicated five times and the experimental unit was a room with 16 sows housed individually. Feed and water intake were controlled daily and BW and backfat at P2 were measured at farrowing and at weaning. Total number of piglets born alive, death, and mummified, and piglet mortality during lactation were recorded per litter. Also, piglet body weight was recorded at birth, and at 3, 14, 21, and at 28 days of age. In addition, the interval weaning to first oestrous and the percentage of sows that did not make next farrowing were recorded. Multiparous sows ate more feed (5.64 vs. 4.25 kg/d; P < 0.001) and drank more water (28.63 vs. 23.07 l/d; P < 0.05) than PRI sows but feed:water ratio was not affected. Body weight change from farrowing to weaning was similar for both groups. Multiparous sows had more piglets born alive (11.4 vs. 10.2; P < 0.05) than PRI sows. Piglets from MUL sows were heavier (P < 0.05) at birth (1.73 vs. 1.53 kg), 3 (2.14 vs. 1.89 kg; P < 0.01), 14 (4.73 vs. 4.26 kg), 21 (6.45 vs. 5.84 kg), and 28 (8.61 vs. 7.58 kg) days of age than piglets from PRI sows. Consequently, from 1 to 28 days of age, piglets from MUL sows had higher ADG than piglets from PRI sows (260 vs. 229 g/d; P < 0.05). Mortality of piglets during lactation and of sows between farrowings was not affected by sow parity. The interval weaning to positive gestation was similar for both groups of sows. Sow parity did not affect the number of piglets born alive or death in the following parity. It is concluded that multiparous sows had higher voluntary feed intake and produce more piglets per litter, which are heavier, than primiparous sows. | |
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Internacional
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Si |
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Nombre congreso
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99th Poultry Science Association Annual Meeting |
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Tipo de participación
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960 |
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Lugar del congreso
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Denver |
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Revisores
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No |
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ISBN o ISSN
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0-8134-2929-3 |
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DOI
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Fecha inicio congreso
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11/07/2010 |
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Fecha fin congreso
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15/07/2010 |
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Desde la página
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354 |
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Hasta la página
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354 |
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Título de las actas
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Poultry Science, 89 (1): 354 |