Strong inhibitory effect of nitrate on atmospheric methane oxidation in forest soils

被引：28
|
作者：
Mochizuki, Yoshito [1 ]
Koba, Keisuke [1 ]
Yoh, Muneoki [1 ]
机构：
[1] Tokyo Univ Agr & Technol, Grad Sch Agr, Fuchu, Tokyo 1838509, Japan
来源：
SOIL BIOLOGY & BIOCHEMISTRY | 2012年 / 50卷
关键词：
Forest soil; Methane oxidation; Inhibition; Nitrate; Ammonium; Soil pH; TEMPERATE SOILS; LAND-USE; FLUX; CONSUMPTION; CH4;
D O I：
10.1016/j.soilbio.2012.03.013
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
We investigated inhibitory effects of ammonium and nitrate on soil methane oxidation in two forests. Mineral soils in a forest with low nitrogen-deposition had much higher methane oxidation rates than those observed in nitrogen-saturated forest soils with higher nitrogen-deposition. Nitrate addition to soils from a low nitrogen-deposition site exhibited a stronger inhibitory effect on methane oxidation than either ammonium or potassium. The decrease in soil pH accompanied by the addition of nitrate was not responsible for this repression. Our results indicate that even a level of nitrate observed in N-saturated forests (dozens of mu g N g soil(-1)) exerts a strong inhibitory effect on the oxidation of atmospheric methane, although the mechanism remains unresolved. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：164 / 166
页数：3
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