Nutrition influence on female swine reproduction
Keywords:
Hyperprolific, female swine, nutrition, reproductive, lifespanAbstract
In an attempt to increase the number of piglets weaned per sow per year, genetic improvement has made sows hyperprolific, leading to increased milk production, number of piglets born, reduced voluntary intake, greater deposition of muscle tissue and lower adipose tissue reserves. This reduced feed intake is a concern, especially in primiparous sows, since during lactation, they mobilize their body reserves to compensate for the reduced intake and meet the nutritional demand for milk production. Hyperprolific sows have higher nutritional requirements and therefore require a differentiated nutritional program in order to avoid severe reproductive and productive impairments. Several studies have been developed and new ones will still be necessary to adapt the nutritional demand in the different phases to the productive profile of the sows, in order to extend the reproductive life of sows.
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