Gh. Nacu


Gh. Nacu, C. Pascal, Cecilia Pop

Researches were made in 1138 by Camborough sows, grouped into 3 groups as follows: WB (witness batch) - 462 sows of untreated hormone; EB 1 (experimental batch 1) - 436 sows stimulated hormone in the weaning day; EB 2 (experimental batch 2) - 240 sows stimulate the hormone at 10 days after weaning. Hormonal stimulating has been given intramuscularly to the basis of the ear, with a dose of 5 ml PG 600. In all the batches was chased fecundity and dynamic heat coming into a period of 30 days after weaning. Application of the treatment in the weaning day resulted grouping heat in day 3 and day 4 after treatment (65.8% of sows in estrus at EB 1, and only 13.9% registered at the witness batch). Application of treatment to 10 days after weaning led to the emergence of estrus following 5 days at 69.5% of sows. In the first 16 days after weaning have heat 66.6% of sows in WB, 82.1% of sows in EB 1 and 88.2% of sows in EB 2. Administration PG 600 in weaning day led to reduced weaning-estru interval from 6.3 days to 3.9 days. For stimulate sows hormonal in weaning day, fecundity was insignificant lower (74%) than the untreated sows (76.9%) or stimulated sows at 10 days after weaning (78.1%). The hormone-therapy is an effective way to improve results obtained in the reproduction sector because corrects some reproduction indices (fecundity and prolificity) and contribute to more intensive use by reducing the unproductive period at sows (weaning-estru interval).

Key words: sows, estrus, hormone therapy, management