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- Title
Isotopically enriched ammonium shows high nitrogen transformation in the pile top zone of dairy manure compost.
- Authors
Koki Maeda; Sakae Toyoda; Midori Yano; Shohei Hattori; Makoto Fukasawa; Keiichi Nakajima; Naohiro Yoshida
- Abstract
Nitrogen isotope ratios (δ15N) of NHC4+ in dairy manure compost piles with and without bulking agent (10%w=w) were compared to understand the effects of the use of bulking agent on nitrogen conversion during manure composting. The δ15N-NH4+ values in each of three pile zones (top, side and core) were also compared. At the end of the process, piles with bulking agent showed significantly higher δ15N values (17:7±1:3 ‰) than piles without bulking agent (11:8±0:9 ‰), reflecting the significantly higher nitrogen conversion and NH3 loss in the former. The samples from the top zone, especially in the piles with bulking agent, showed very high NH4+ concentrations with significantly high 15N (δ15N: 12.7-29.8 ‰) values, indicating that extremely high nitrogen conversion, nitrification-denitrification activity of the microbes and NH3 volatilization occurred in this zone.
- Subjects
NITROGEN isotopes; AMMONIUM; MANURES; COMPOSTING; ORGANIC fertilizers
- Publication
Biogeosciences, 2016, Vol 13, Issue 4, p1341
- ISSN
1726-4170
- Publication type
Article
- DOI
10.5194/bg-13-1341-2016