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Animal Science Papers and ReportsConcentration of harmful gases in poultry and pig housesŠtefan Mihina 1, 2
broilers /chickens / fattening pigs / harmful gases / litter
Abstract :
A common chicken broilers rearing house and fattening pig barn were monitored for harmful
gases concentration (NH
3
, CO
2
, NO
2
and CH
4
). In chickens the concentrations of NH
3
rose during
fattening periods in all seasons of the year (from 0.23 to 10.77 mg.m
-3
). They varied depending on
the ventilation rate and were influenced by litter temperature. The daily mean concentrations of
CO
2
were decreasing towards the end of the fattening period and were influenced by heating at the
beginning and by birds breathing at the end of fattening periods. Mean daily concentrations of N
2
O
ranged from 0.92 to 8.24 mg.m
-3
and CH
4
from 46.59 to 134.12 mg.m
-3
. In the pig house the NH
3
concentrations varied from 2.64 to 22.9 mg.m
-3
, but not simultaneously to the growth of body weight
as in chickens. They also varied depending on ventilation rate, but differences in that parameter
between the colder and warmer periods were not found sinificant. The mean daily production of
CO
2
ranged from 975.36 to 9948.78 mg.m
-3
, N
2
O from 1.08 to 6.39, and CH
4
from 33.51 to 189.63,
without any significant differences between periods and with no relation to age and weight of
animals. Significant positive correlations in chicken broilers were found between the production
of ammonia and litter temperature and in cold periods also with ventilation rate. In fattening pigs
higher correlations related to methane production were found only.
Keywords :
broilers /chickens / fattening pigs / harmful gases / litter
Date Deposited : 01 Apr 2015 16:13 Last Modified : 01 Apr 2015 16:13 Volume 30, Number 4, - 2012
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