摘要
无机氮输入 (施氮肥和大气N沉降 )对土壤CH4 氧化作用的影响取决于甲烷氧化菌类型、输N种类和量以及土壤状况 .这种作用既有抑制作用 ,又有刺激作用 ,但文献报道的抑制作用多于刺激作用 ,NH4 + 对CH4 氧化的抑制作用多于NO3-.随着全球N输入的增加 ,应在广泛的土壤类型和气候带观测和评价无机氮对土壤CH4 氧化作用的影响 .无机氮对土壤CH4 氧化的抑制作用表现为立即或直接抑制、延迟抑制以及缺乏抑制等多种模式 .尽管目前一些学者用酶基质竞争、增高的 值、盐作用和离子交换、N转化率和N浓度等来解释抑制现象 ,但抑制机理依旧不完全清楚 .因此 。
The effects of N inputs,including N fertilizer applications and atmospheric N depositions, on CH 4 oxidation by soils were determined by CH 4 oxidizing bacteria, N inputs and soil factors. These effects were inhibitory or stimulative, but inhibition was more popular than stimulation, and the inhibition of NH 4 + was more popular than that of NO 3 -. Wealthy experiments in different soils and climate regions are required to monitor and evaluate how N inputs influence CH 4 oxidation in soils. Generally, CH 4 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 CH 4 and NH 4 + 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.
出处
《应用生态学报》
CAS
CSCD
2003年第2期305-309,共5页
Chinese Journal of Applied Ecology
基金
中国科学院知识创新项目 (KZCX2 413 5 )
英国皇家学会(RoyalFellowship
RoyalSocietyofUnitedKingdom)资助项目
