China Animal Husbandry & Veterinary Medicine ›› 2024, Vol. 51 ›› Issue (8): 3687-3701.doi: 10.16431/j.cnki.1671-7236.2024.08.045

• Environmental Safety • Previous Articles    

Distribution Characteristics of Ammonia,Carbon Dioxide and Airborne Particle Concentrations in a Broiler House with Vertical Tiered Cages in Winter

TANG Luchan1, WANG Jun1, SHI Zhifang2, LI Xuanyang2, XI Lei1,2   

  1. 1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China;
    2. College of Animal Science and Technology, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China
  • Received:2024-01-05 Online:2024-08-05 Published:2024-07-31

Abstract: 【Objective】 The aim of this study was to explore the distribution characteristics of ammonia (NH3),carbon dioxide (CO2) and airborne particle concentration in a broiler house with vertical tiered cages in winter,and provide basic parameters for the control of environmental uniformity in three-dimensional breeding chicken houses.【Method】 From November 22 to December 30,2022,a broiler house with vertical tiered cages (Cobb White feather broiler) in Northern Henan was used as the research object.At 7,14,21,28 and 35 days of age,the concentrations of NH3,CO2 and airborne particle at 15 different positions in the house were measured at 06:00,09:00,12:00,15:00 and 18:00,respectively.【Result】 ①The average NH3 concentration in the broiler house was 1.72 mg/m3,with significant differences in daily variation (P<0.05).In the changes of stage,the NH3 concentration at 14 days of age was significantly higher than that at 21 and 35 days of age (P<0.05).In longitudinal comparison,the NH3 concentrations in the middle and rear ends were significantly higher than that in the front end at 7,14 and 28 days of age (P<0.05).In the vertical direction,the NH3 concentration increased significantly from top to bottom at 21 and 35 days of age (P<0.05),and the NH3 concentrations in the middle and lower equal height positions were significantly higher than those in the upper equal height position at 28 days of age (P<0.05).In the three-dimensional distribution,there were significant differences among the 15 measurement points (P<0.05),and the NH3 concentration difference at 14 days of age was the largest,which was 0.81 mg/m3.② The average CO2concentration in the broiler house was 1 987 mg/m3,and the 14-day-old was significantly higher than other days (P<0.05).In the diurnal variation,the CO2 concentrations at 06:00 and 09:00 were significantly higher than those at 15:00 and 18:00 (P<0.05),and 12:00 was the lowest.In longitudinal comparison,the CO2 concentration in the rear end was significantly higher than that in the front end and the middle at 7 days of age (P<0.05),the middle and rear end were significantly higher than the front end at 14 days of age (P<0.05),and the rear end was significantly higher than the front end at 35 days of age (P<0.05).There was no significant difference in vertical direction (P>0.05).In the three-dimensional distribution,there were significant differences among the 15 measurement points (P<0.05),and the concentration difference was the largest at 35 days of age,which was 471 mg/m3.③The average concentrations of fine particulate matter (PM2.5),inhalable particulate matter (PM10) and total suspended particulate matter (TSP) were 125.28 μg/m3,155.24 μg/m3 and 2.17 mg/m3,respectively.There were significant differences in diurnal variation (P<0.05).The phase change increased significantly with the increase of day age (P<0.05),and there were no significant differences in longitudinal,vertical and three-dimensional distribution (P>0.05).【Conclusion】 In winter,the concentration distribution of NH3,CO2 and airborne particle in the broiler house with vertical tiered cages were uneven,and the concentration of CO2 exceeds the standard,so it was necessary to strengthen ventilation.

Key words: ammonia (NH3); carbon dioxide (CO2); airborne particle; stacked-cage raising; broiler

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