›› 2019, Vol. 46 ›› Issue (8): 2431-2437.doi: 10.16431/j.cnki.1671-7236.2019.08.029

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Study on the Effect of Water Extract from Walnut Green Husks on Growth Performance and Immune Effect of Avian Influenza and Newcastle Disease in Chickens

XIAO Wangcheng1, ZHOU Lang1, LI Juan1, DUAN Gang1, ZAHNG Anjie1, XU Xiaoqing1, DAI Feiyan1, DONG Guodong2, ZENG Bangquan2, DUAN Bofang2   

  1. 1. College of Animal Medicine, Yunnan Agricultural University, Kunming 650201, China;
    2. Yunnan Province Center for Animal Disease Control and Prevention, Kunming 650201, China
  • Received:2018-10-26 Online:2019-08-20 Published:2019-08-17

Abstract:

The purpose of the experiment was to study the effects of water extracts from walnut husks on the growth performance and the levels of avian influenza and Newcastle disease antibodies in indigenous hybrid chickens in Yunnan province.120 local indigenous hybrid chickens at 28 days old were randomly divided into 4 groups, control group, test group 1, 2 and 3, with the walnut husks water extract was respectively added to the drinking water at a concentration of 0, 1%, 3%, and 5%.30 birds in each group (half male and female).The results of growth performance showed that, at 65 days of age, the body weights of test groups were significantly higher than that of control group (P<0.05), and that in test group 3 was significantly higher than the other two test groups (P<0.05).The average daily gain (ADG) of test group 3 was 62.89 g, and was significantly higher than the control group and other test groups (P<0.05).F/G of test group 3 was lower than that of the control group and other test groups (P<0.05), which was decreased by 12.00%, 13.39%, and 5.17%, respectively.The antibody levels of Newcastle disease (ND) and avian influenza (H7, H5) were measured after immunization.After 46 d of immunization, the level of ND antibody in test group 3 was significantly higher than that in the control group and other test groups (P<0.05).After 48 days of immunization, the levels of H7 antibodies in test 2 and 3 groups were significantly higher than those in control group and test 1 group (P<0.05).Compare to control group, the level of H5 antibody had no significant difference in test group 2 and 3 (P>0.05).The results showed that the water extract of walnut green husks could improve the growth performance of and the levels of antibodies against Newcastle disease and avian influenza (H7) in Yunnan native hybrid chickens, and its effect increased with the increase of water concentration of walnut green husks water extract.In general, the supplementation of 5% walnut green husks water extract was the best.

Key words: walnut green husks; indigenous hybrid chickens; growth performance; antibody levels

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