THE CAUSES OF GESTATION LOSS DEPENDING OF SEASON AT SOWS
Abstract
The manifestation of the oestrus at sows after separation of the piglets is conditioned by a number of managerial factors, nutrition having an important role in the normal development of the puerperium, the appearance of the oestrus and the normal progression of gestation. Productivity of primary sows does not increase by increasing the weaning age of piglets, well-seasoned weaning at 25-28 days, and helping to reduce unproductive days by reducing the weaning interval at 7 days. The season of weaning makes that the moment of appearance of the postpartum estrogen to differ considerably, the extension of the weaning period in the summer period is explained by the insufficient amount of the hormone stimulating follicle caused by the thermal stress. The causes of gestational loss in the primiparous sows are related to the repeating of oestrus, reforms and mortality, the lowest losses occurring in the cold season.
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Copyright (c) 2019 Gheorghe Danciu, Goran Panici, Diana Marin, Cornelia Petroman, Ioan Petroman
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LUCRĂRI ȘTIINȚIFICE MANAGEMENT AGRICOL
ISSN print 1453-1410
ISSN online 2069-2307
(former ISSN 1453-1410, E-ISSN 2069-2307)
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