大白猪哺乳期背膘损失对繁殖性能的影响

doi:10.16431/j.cnki.1671-7236.2018.10.016

Abstract

Abstract:

In order to study the effect of backfat loss of lactating sows on reproductive performance in Large White pig,1 178 Large White pigs were selected,the total number of born (TNB),number of born alive (NBA),number of healthy born (NHB),weight of weaning litter (WWL),weaning estrus interval (WEI) and backfat loss of lactating sows (BLL) were recorded during 6 parities.The sows were divided into 6 groups based on BLL as < 0,0-1,1-2,3-4,5-6 and > 6 mm.WWL was used as a covariate to examine the significant differences between groups of TNB,NBA,NHB and WEI using the least squares test.The results showed that the average TNB,NBA,NHB,WWL,WEI and BLL for 6 parities sows were 13.67 heads,11.51 heads,10.32 heads,65.90 kg,4.83 d and 2.89 mm,respectively.There was significant difference in litter size traits in different groups of BLL during 6 parities (P < 0.05).Based on the results of all 6 parities,there was no significant difference among groups 4,5 and 6 of BLL (P > 0.05),but it were significantly higher than those in groups 1,2,and 3 (P < 0.05).The TNB in group 4 was the highest,reaching 13.54 heads,1.90,2.29 and 1.63 heads more than those in groups 1,2 and 3 (P < 0.05),respectively.Although there were sometimes significant differences of NBA and NHB in each group and each parity,there was no significant difference among 6 groups in 6 parities (P > 0.05).From the standpoint of WEI,no significant differences were observed in groups (P > 0.05).The results indicated that in the production of Large White pigs,higher TNB could be achieved by controlling the BLL in the range of 3 to 4 mm.

Key words: Large White pigs; backfat loss of lactation; litter performance; weaning estrus interval

CLC Number:

S828

ZHOU Weiwei, GUO Hongzhou, WANG Ligang, ZHANG Yuebo, YUE Jingwei, LIU Qiufeng, WANG Lixian, YAO Jun, ZHANG Youquan, ZHANG Longchao. Effects of Backfat Loss of Lactating Sows on Reproduction Performance in Large White Pigs[J]. , 2018, 45(10): 2797-2804.

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Effects of Backfat Loss of Lactating Sows on Reproduction Performance in Large White Pigs

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