Effect of level amino acid at lactation between primiparous and multiparous sows on sow performance | Efecto del nivel aminoácido sobre la productividad en sistemas de cerdas primerizas vs multíparas
2011
Sánchez, M., [email protected] | Peinado, J. | Medel, P. | Coll, C.
A total of 82 sows was used to evaluate the effect of two different levels amino acid (1.03 vs 1.19 % lys) at lactation and parity number (primiparous and multiparous) on sow performance. Observations included body weight and fat depth at P2 at farrowing and at weaning, feed intake during lactation, number of piglets born alive and weaned per sow and weight of litter at birth after cross-fostering and at weaning. Data were analysed as a completely radomised factorial design by GLM of SAS. There were no statistically significant differences between the two diets. At farrowing and at weaning multiparous sows were heavier than primiparous sows (265.7 vs 229.8 and 265.7 vs 229.8 kg; P=0.0001). No differences were detected on backfat during the experiment. Multiparous sows had a higher number of dead piglets at birth (0.91 vs 0.42 piglets; P<0.01). However piglets from multiparous sows born alive were heavier body weight at farrowing (18.75 vs 16.77 kg; P=0.03) and at weaning (55.35 vs 51.17 kg; P=0.08), than piglets from primiparous sows. Moreover, multiparous sows ate more feed (104.0 vs 83.6 kg/sow; P=0.0001) than primiparous sows during lactation. Under our experimental conditions it can be concluded that supplementing the diets with 15% of amino acids had not effect on the sows or on their litters. Also, multiparous sows ate more feed than primiparous sows and their litters have higher growth.
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