›› 2018, Vol. 45 ›› Issue (6): 1510-1517.doi: 10.16431/j.cnki.1671-7236.2018.06.011

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Effects of Transfer Time and Spraying Essential Oil on Weanling Stress in Weaned Piglets

LI Ping1,2, WANG Wenjie1,2, MU Shuqin1,2, YAN Jun1,2, MA Yanxuan1, MA Yong1,2, ZHENG Zi1,2   

  1. 1. Tianjin Institute of Animal Husbandry and Veterinary, Tianjin 300380, China;
    2. Tianjin Livestock and Poultry Health Breeding Technology Engineering Center, Tianjin 300380, China
  • Received:2017-11-24 Online:2018-06-20 Published:2018-06-15

Abstract:

This study was conducted to elucidate the effects of transfer time and spraying essential oil on weanling stress of weaned piglets so as to optimize the model of transfer,192 28-day-old Duroc pig×Large White pig×Yorkshire pig crossed weaned piglets with (7.00±0.50) kg body weight were chosen and divided into 4 groups with three repeats per group and 16 piglets per repeat.2×2 orthogonal design was used to discuss the effects of different transfer time (08:00 and 20:00) and the spraying essential oil (spraying or not spraying) on diarrhea rate,mortality,blood biochemical indexes,oxidation indexes and immune indexes of weaned piglets.The results showed that there were no significant difference of serum TP and ALB levels among the experimental groups at 1,8 and 24 h after transfer (P>0.05).The serum GLU of weaned piglets in groups transfered at 20:00 was lower than that transfered at 08:00,and that was lower after sprayed essential oil.The serum COR and MDA level were reduced with the increasing of post-transfer time.The MDA level of groups spraying essential oil were significantly decreased than that not spraying essential oil at 1 and 8 h after transfer (P<0.05),and the COR level was significantly decreased at 24 h after transfer (P<0.05).There were no significant differences of serum IgA,IgM and IgG levels among the experimental groups at 1,8 and 24 h after transfer (P>0.05).There was no significant difference of IL-10 level in groups when transfered at different time,while it was significantly decreased when sprayed essential oil (P<0.05),and that was lowest in group transfered at 20:00 and sprayed essential oil.In conclusion,the weanling stress was lower when piglets transfered in at 20:00 than at 08:00,and spraying essential oil could further relieve stress reaction,it was an ideal model to reduce piglets weaning stress when transfered in the evening and sprayed essential oil.

Key words: weaned pigs; weanling stress; transfer time; essential oil

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