Bài báo khoa học

This research was aimed at understanding physiological reproduction characteristics and reproductive performance of GF24 sows in industrial pig production system. The research was done on gilts/sows with parities from 1 to 3 kept in climate-controlled houses in Quangtri province. Physiological reproduction characteristics, farrowing time distribution, and reproductive performance were directly recorded on gilts/sows and their progenies. Results showed that GF24 sows had a high reproductive performance number born, number born alive and number weaned/litter were 12.8, 12.5 and 12.1 piglets, respectively. Age at first oestrus, first service and first farrowing were 157.1, 229.8 and 353.7 days, respectively. The oestrous cycle was 21.6 days. The oestrous duration lasted for 7.4 days. The duration from first signals of oestrus till standing heat was 66.8 hours. The standing heat duration lasted for 54.4 hours. GF24 sows mainly started farrowing during day time (61.3%). The duration of farrowing 1st piglet till the last one; and from the last one until the placenta delivery were 254.7 and 116.3 minutes, respectively.