[Effect of inorganic nitrogen on CH4 oxidation in soils].
The effects of N inputs, including N fertilizer applications and atmospheric N depositions, on CH4 oxidation by soils were determined by CH4-oxidizing bacteria, N inputs and soil factors. These effects were inhibitory or stimulative, but inhibition was more popular than stimulation, and the inhibition of NH4+ was more popular than that of NO3-. Wealthy experiments in different soils and climate regions are required to monitor and evaluate how N inputs influence CH4 oxidation in soils. Generally, CH4 oxidation in soils following N inputs showed multiple inhibition patterns, i.e., immediate or direct inhibition, delayed inhibition, and absence of inhibition. Some researchers explained the inhibition mechanism through using competition between CH4 and NH4+ for the same enzyme sites, elevated threshold, salt effect and ion-exchange, and N turnover rate and N concentration. However, the inhibitory mechanism is still unclear. Therefore, inhibitory mechanism is one of the main research concerns in future.
Wang
Zhiping
Z
Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China. wangzp5@yahoo.com
Hu
Chunsheng
C
Yang
Jurong
J
D000641:Ammonia / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism*; D008697:Methane / Q000378:metabolism*; D009584:Nitrogen / Q000494:pharmacology*; D010084:Oxidation-Reduction; D012988:Soil Microbiology
D000641:Ammonia; D009584:Nitrogen; D008697:Methane