Back to Search
Start Over
Evaluation of gaseous concentrations, bacterial diversity and microbial quantity in different layers of deep litter system.
- Source :
-
Asian-Australasian journal of animal sciences [Asian-Australas J Anim Sci] 2017 Feb; Vol. 30 (2), pp. 275-283. Date of Electronic Publication: 2016 Jun 11. - Publication Year :
- 2017
-
Abstract
- Objective: An experiment was conducted to investigate the environment of the deep litter system and provided theoretical basis for production.<br />Methods: The bedding samples were obtained from a pig breeding farm and series measurements associated with gases concentrations and the bacterial diversity as well as the quantity of Escherichia coli , Lactobacilli , Methanogens were performed in this paper.<br />Results: The concentrations of CO <subscript>2</subscript> , CH <subscript>4</subscript> , and NH <subscript>3</subscript> in the deep litter system increased with the increasing of depth while the N <subscript>2</subscript> O concentrations increased fiercely from the 0 cm to the -10 cm depth but then decreased beneath the -10 cm depth. Meanwhile, the Shannon index, the dominance index as well as the evenness index at the -20 cm layer was significantly different from the other layers (p<0.05). On the other hand, the quantity of Escherichia coli reached the highest value at the surface beddings and there was a significant drop at the -20 cm layer with the increasing depth. The Lactobacilli numbers increased with the depth from 0 cm to -15 cm and then decreased significantly under the -20 cm depth. The expression of Methanogens reached its largest value at the depth of -35 cm.<br />Conclusion: The upper layers (0 cm to -5 cm) of this system were aerobic, the middle layers (-10 cm to -20 cm) were micro-aerobic, while that the bottom layers (below -20 cm depth) were anaerobic. In addition, from a standpoint of increasing the nitrification pathway and inhibiting the denitrification pathway, it should be advised that the deep litter system should be kept aerobic.
Details
- Language :
- English
- ISSN :
- 1011-2367
- Volume :
- 30
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Asian-Australasian journal of animal sciences
- Publication Type :
- Academic Journal
- Accession number :
- 27383809
- Full Text :
- https://doi.org/10.5713/ajas.16.0282