藏猪繁殖性能研究

Investigation on Reproductive Capacity in Tibetan Pig

本文初步探明了藏猪的发情规律,其发情周期为25.17 d、持续期为4.72 d,妊娠期为114.96 d。对111窝藏猪的繁殖性能进行研究分析,结果表明,1胎的繁殖性能明显低于2胎及多胎:其中产活仔数分别低1.45头、2.36头,初生窝重分别低1.17、1.69 kg;60日龄窝头数分别低1.37、2.66头,60日龄窝重分别低6.94、13.08 kg。杂交试验表明,藏猪与其他品种杂交后,繁殖性能有所提高,品种间杂交可以改善藏猪的繁殖性能。

The estrus pattern of the Tibetan pigs was tested. The results showed that the estrus cycle was 25.17 days, the duration of estrus was 4.72 days and the gestation was 114.96 days. The analysis of reproductive traits of Tibetan pigs based on 111 litters showed that the re- productive performance at first farrowed was obviously lower than that of second or subsequent： total number born alive per liner was I. 45 and 2.36 less respectively,total litter weight at birth was 1.17 and 1.69 kg lower respectively; total number per litter at 60 days was 1.37 and 2.66 less respectively,total litter weight at 60 days was 6.94 and 13.08 kg lower respectively. Cross test showed that reproductive traits were improved after the Tibetan pigs crossing with other breeds, breed cross could improve reproductive traits of Tibetan pig.