期刊
BIOSYSTEMS ENGINEERING
卷 147, 期 -, 页码 81-89出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.biosystemseng.2016.04.002
关键词
Pigs; Rearing system; Growth performance; Excreting behaviour; Ammonia emission
资金
- Slovenian Research Agency [V4-0338, P1-0164]
Ammonia emissions from organic (ORG) and conventional (CON) rearing systems in relation to pig growth rate and behaviour were studied. Microclimatic conditions and ammonia concentrations were monitored. Excretory behaviour was recorded in the growing and fattening periods using video cameras. Throughout the experiment, significantly lower ammonia emission was detected in facilities of the ORG pigs (P < 0.001). The differences in ammonia emission may be partially explained as a consequence of lower level of crude protein, lower feed intake and different growth performance of ORG pigs. Urination and defecation indoor (on the slatted and solid floors) were higher in the CON group (P < 0.05). The results of the present study show that the minimum requirements specified in organic legislation are well suited to normal pig excretory behaviour in both growing and fattening stages and provides pigs cleaner indoor space as well as an improved environment for human and pigs, with around 40% of reduced ammonia emission. (C) 2016 IAgrE. Published by Elsevier Ltd. All rights reserved.
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