Inhibition of denitrification and N2O emission by urine-derived benzoic and hippuric acid

被引：31
|
作者：
van Groenigen, Jan Willem
Palermo, Vanessa
Kool, Dorien M.
Kuikman, Peter J.
机构：
[1] Univ Wageningen & Res Ctr, Alterra, NL-6700 AA Wageningen, Netherlands
[2] Univ Palermo, Dept Environm & Territorial Agron, I-90128 Palermo, Italy
来源：
SOIL BIOLOGY & BIOCHEMISTRY | 2006年 / 38卷 / 08期
关键词：
urine composition; greenhouse gas; respiration; mitigation; nitrous oxide;
D O I：
10.1016/j.soilbio.2006.02.023
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
Hippuric acid (HA) in cattle urine acts as a natural inhibitor of soil N2O emissions. As HA concentration varies with diet, we determined critical HA levels. We also tested the hypothesis that the inhibition occurs because the HA breakdown product benzoic acid (BA) inhibits denitrification rates. During a 64-day incubation, we quantified emissions from artificial urine varying in HA, BA and glycine (Gly) concentrations, added to a sandy pasture soil. Increasing HA concentration from 0.4 to 5.6mmol kg(-1) soil significantly decreased the average N2O flux by 54%. At 3.9 mmol kg(-1) soil, denitrification levels were 50% reduced for BA as compared to Gly. We conclude that HA inhibits both denitrification and N2O emission, at least partly through a BA mechanism. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2499 / 2502
页数：4
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