品种、进群和配种季节、首配日龄对后备母猪繁殖性能的影响

doi:10.16431/j.cnki.1671-7236.2019.11.023

Abstract

Abstract: To explore the effects of variety,the seasons of entering into swinery and breeding,first mating time on reproduction performance of gilts,the breeding status of 1 656 gilts were observed and recorded in this study,and they were grouped according to different varieties,the seasons of entering into swinery,the seasons of breeding and the first mating time,and statistical analysis was performed among the different groups.The results showed that:①The breeding utilization rate of Landrace gilts (89.73%) was extremely significantly higher than those of Yorkshire gilts (75.00%) and Landrace-Yorkshire hybrid gilts (80.57%)(P<0.01);The total number of born (TNB) of Landrace-Yorkshire hybrid gilts in the first parity (11.36) was significantly higher than that of Yorkshire gilts (10.35) (P<0.01),and significantly higher than that of Landrace gilts(10.74) (P<0.05).②The breeding utilization rate (100.00%) of Landrace-Yorkshire hybrid gilts of entering into swinery in the spring and winter was extremely significantly higher than those of entering into swinery in the summer (71.89%) and autumn (51.47%) (P<0.01),and the breeding utilization rate of Landrace-Yorkshire hybrid gilts in the summer was also significant higher than that in the autumn (P<0.01);The delivery rate of conception of breeding Landrace-Yorkshire hybrid gilts in the autumn (86.21%) was significantly lower than that in the spring(94.07%)(P<0.05),and extremely significantly lower than that in the winter (97.42%) (P<0.01).③The number of born alive (NBA) of Landrace-Yorkshire hybrid gilts in the group of 211~230 d first mating time (9.30) was significantly lower than those of the groups of 231~250 d (10.15) and 251~230 d (10.36) (P<0.05),and extremely significantly lower than that of the group of 271~290 d(10.48) (P<0.01);The number of qualified piglets of Landrace-Yorkshire hybrid gilts in the group of 211~230 d first mating time (8.96) was significantly lower than that of the group of 231~250 d (9.82) (P<0.05),and extremely significantly lower than those of the groups of 251~270 d (10.04) and 271~290 d (10.21) (P<0.01).In summary,the breeding utilization rate of Landrace gilts was better,and the litter performance of Landrace-Yorkshire hybrid gilts was better among the different varieties of gilts.The breeding utilization rates of Landrace-Yorkshire hybrid gilts of entering into swinery in the spring and winter seasons were better,and the delivery rate of conception was poor when the season of breeding was in the autumn,and the litter performance of Landrace-Yorkshire hybrid gilts was poor in the group of 211~230 d first mating time,and it had an increasing trend when they were bred in 211~290 d first mating time.

Key words: gilt; variety; the season of entering into swinery; the season of breeding; first mating time; reproduction performance

CLC Number:

S828

XU Zhen, LYU Minyong, WEI Hengxi, ZHANG Huiwen, CHEN Guangxin, LI Zan, LI Li, MENG Li, ZHANG Shouquan. Effects of Variety,the Seasons of Entering into Swinery and Breeding, First Mating Time on Reproduction Performance of Gilts[J]. China Animal Husbandry and Veterinary Medicine, 2019, 46(11): 3332-3340.

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Effects of Variety,the Seasons of Entering into Swinery and Breeding, First Mating Time on Reproduction Performance of Gilts

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