Effect of the age at first parturition and parturition season on Iberian primiparous sows performance | Efecto de la edad al primer parto y de la estación de parto sobre los resultados reproductivos de cerdas primíparas de raza ibérica
2011
Blanco, A., Universidad Politécnica de Madrid (España). Escuela Técnica Superior de Ingenieros Agrónomos | Daza, A., Universidad Politécnica de Madrid (España). Escuela Técnica Superior de Ingenieros Agrónomos
Fifty-four farrowings of primiparous sows of Iberian breed were controlled. The age at first parturition (precocious vs late) and parturition season (autumn vs summer) had not significant influence (P>0,05) on reproductive results and piglets mortality (born piglets, liveborn piglets, stillborn piglets, piglets lost during lactation period, weaned piglets, percentage of stillborn piglets and mortality rate during lactation). However, litter weight at birth and the average piglet weight at birth were significantly (P<0.05) higher in sows that farrowed in summer. The interaction age at first parturition x parturition season was significant (P<0.05) for the variables litter weight at weaning, average piglet weight at weaning and piglets average daily gain during the lactation. The values of these variables were significantly higher in summer than in autumn in precocious sows. The relationships between stillborn piglets and born piglets and between mortality rate of piglets during lactation and live born piglets adjusted to quadratic functions. The variables weaned piglets and lactation duration, jointly, accounted for 60% of the variation in average piglets weight at weaning.
اظهر المزيد [+] اقل [-]