Influence of Ambient Microbial Aerosol on Stress and Performance of Meat Ducks Raised in Sheds during Winter

YU Guanliu; LIU Jiyuan; WANG Ye; CAI Yumei; CHAI Tongjie; GAO Jing

doi:10.3969/j.issn.1006-267x.2015.11.011

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 11: 3402 - 3410

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.11.011

POULTRY NUTRITION

Influence of Ambient Microbial Aerosol on Stress and Performance of Meat Ducks Raised in Sheds during Winter

YU Guanliu ,
LIU Jiyuan ,
WANG Ye ,
CAI Yumei ,
CHAI Tongjie ,
GAO Jing

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1. Sino-German Cooperative Research Centre for Zoonosis of Animal Origin Shandong Province, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China;
2. The Central Hospital of Tai'an, Tai'an 271018, China

Received date: 2015-05-09

Online published: 2015-11-21

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Abstract

The aim of this study was to evaluate the effects of different microbial aerosol concentrations on the performance of meat ducks and shed light on the establishment of microbial aerosol concentration standards for poultry breeding. A total of 600 one-day-old Cherry Valley duck were selected and randomly divided into five groups (one standardized management as control group named group A and four test group with sanitary conditions gradually becoming poor respectively named groups B, C, D and E). Each group was set up for three repeats and each repeat contained 40 ducks. Air samples were collected by two air microorganism sample collectors Andersen-6 and AGI-30 to detect the composition and content of microbial aerosol. The concentration changes of adrenocorticotropic hormone (ACTH) of ducks were detected to evaluate animal stress intensity. Correspondingly, the performance indicators, slaughter index and so on were tested and evaluated to analyze the influence of environmental factors on the duck body. The results showed that when microbial aerosol concentrations (group D) reached 2.96×10⁵ CFU/m³, 2.63×10⁴ CFU/m³, 3.09×10⁴ CFU/m³, 41.78×10³ EU/m³ for aerobic bacteria, fungi, gram-negative bacteria and endotoxin, respectively, the ACTH concentration of serum, feed to gain ratio, mortality of meat ducks were significantly increased compared with that of the control group (P<0.05 or P<0.01); the daily gain, breast muscle percentage, carcass weight, slaughter rate of the meat duck were significantly reduced compared with that of the control group (P<0.05 or P<0.01). Our study indicates that microbial aerosol can significantly reduce the performance of ducks. Furthermore, the microbial aerosol parameters of airborne aerobic bacteria (2.96×10⁵ CFU/m³), airborne fungi (2.63×10⁴ CFU/m³), airborne Gram-negative bacteria (3.09×10⁴ CFU/m³) and airborne endotoxin concentration (41.78×10³ EU/m³) can be preliminarily used for the upper limit of the standard of microbial aerosol in duck breeding environment.

Key words： shed-raising ducks; microbial aerosol; performance; stress; cherry valley ducks

Cite this article

YU Guanliu , LIU Jiyuan , WANG Ye , CAI Yumei , CHAI Tongjie , GAO Jing . Influence of Ambient Microbial Aerosol on Stress and Performance of Meat Ducks Raised in Sheds during Winter[J]. Chinese Journal of Animal Nutrition, 2015 , 27(11) : 3402 -3410 . DOI: 10.3969/j.issn.1006-267x.2015.11.011

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