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The journal AGRICULTURA (A) publishes scientific works from the following fields: animal science, plant production, farm mechanisation, land management, agricultural economics, ecology, biotechnology, microbiology
ISSN 1581-5439
Marija VOGRIN BRAČIČ and Dejan ŠKORJANC
pp. 5-12

A review of the factors infl uencing the post-weaning performance of primiparous and multiparous sows was discussed. Factors examined included the breed, feeding, lactation length, body mass, gilt age at first mating, backfat thickness, season of the year, as well as the hormonal stimulation of estrus in young and primiparous sows. Insuffi cient feeding during lactation and a decrease in body mass, low backfat thickness at weaning, short/insufficient lactation, inadequate time of mating and a high environment temperature all had negative influences on the time between weaning and fi rst re-mating of primiparous sows. Contradictory views over the ideal age at first mating of gilts and the impacts on their future fertility have been expressed in the literature. The hormonal induction of estrus in primiparous sows by PG600 at various points before weaning, at weaning or aft er weaning affects the productivity of sows during future parities in complex ways.

Key words: weaning-to-estrus interval, weaning-to-service interval, weaning-to-conception interval, fertility of sows


Slovenian:

Pregled plivov na poodstavitvene lastnosti prvesnic in starih svinj

V članku so predstavljeni vplivi, ki učinkujejo na poodstavitvene lastnosti svinj prvesnic in starih svinj. Proučevani vplivi so bili pasma, dolžina laktacije, telesna masa, starost ob prvem pripustu, debelina hrbtne slanine, sezona in hormonalne stimulacije estrusa pri mladicah in starih svinjah. Nezadostna oskrba s krmo, znižanje telesne mase, tanka hrbtna slanina ob odstavitvi, kratka ali prekratka laktacija, nepravilni čas pripusta in visoke okoliške temperature imajo negativen vpliv na prvi pripust prvesnic po odstavitvi. V literaturi obstajajo različni nasprotujoči se pogledi na starost in telesno maso mladic, ko naj bi jih začeli uporabljati v reprodukciji. Uporaba PG600 pred, ob ali po odstavitvi vpliva na produktivnost svinj v proučevanih naslednjih prasitvah.

Ključne besede: interval od odstavitve do estrusa / interval od odstavitve do pripusta / interval


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