TITLE

DIURNAL VARIATION OF AMMONIA EMISSION IN PIG FATTENING FACILITTIES

AUTHOR(S)
OCEPEK, M.; BERK, P.; RAKUN, J.; JANZEKOVIC, M.; SKORJANC, D.
PUB. DATE
January 2012
SOURCE
DAAAM International Scientific Book;2012, p107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The objective of the present study was to determine diurnal variation of ammonia emission in pig fattening facilities. Measurements were carried in fattening period from 11 weeks of pigs' age to 26 weeks of pigs' age. The performance characteristics of daily gain, body weight and feed consumption were evaluated. In addition, excretory behaviour was evaluated in first (11-22 weeks) and last part (22-26 weeks) of the fattening periods. Microclimatic conditions and ammonia concentration were observed using a monitoring system. In first 11 weeks (11-22 week), ammonia emission increased for around 66 % (25 g per pig day-1; 20 % g per pig night-1) and for 75 % (25 g per pig day-1; 20 % g per pig night-1) in whole fattening period (11-26 weeks). Such differences in ammonia emission may be explained as a consequence of change excretory behaviour of the pigs, which is a result of the increased pigs' body weight. Higher differences in ammonia emission per pig, during day and night time were observed in first part (11-22 weeks) of fattening period (25 %). In the last part (22-26 weeks) of fattening period, diurnal variation of ammonia emission decreased to 17 % and was lowest in last week's (5 %). This could be explained with pigs' change activity pattern (day/night), especially, pigs with lower status of social hierarchy.
ACCESSION #
83258366

 

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