期刊
JOURNAL OF ENVIRONMENTAL QUALITY
卷 39, 期 5, 页码 1813-1820出版社
AMER SOC AGRONOMY
DOI: 10.2134/jeq2009.0382
关键词
-
资金
- Danish Ministry of Food, Agriculture and Fisheries
Floating, organic crusts on liquid manure, stored as a result of animal production, reduce emission of ammonia (NH(3)) and other volatile compounds during storage. The occurrence of NO(2)(-) and NO(3)(-) in the crusts indicate the presence of actively metabolizing NH(3)-oxidizing bacteria (AOB) which may be partly responsible for this mitigation effect. Six manure tanks with organic covers (straw and natural) were surveyed to investigate the prevalence and potential activity of AOB and its dependence on the O(2) availability in the crust matrix as studied by electrochemical profiling. Oxygen penetration varied from <1 mm in young, poorly developed natural crusts and old straw crusts, to several centimeters in the old natural crusts. The AOB were ubiquitously present in all crusts investigated, but nitrifying activity could only be detected in old natural crusts and young straw crust with high O(2) availability. In old natural crusts, total potential NH(3) oxidation rates were similar to reported fluxes of NH(3) from slurry without surface crust. These results indicate that old, natural surface crusts may develop into a porous matrix with high O(2) availability that harbors an active population of aerobic microorganisms, including AOB. The microbial activity may thus contribute to a considerable reduction of ammonia emissions from slurry tanks with well-developed crusts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据