摘要
三江平原土壤不同深度氧化大气浓度CH4和高浓度CH4的速率具有明显的垂直差异 .2个非淹水土壤整个剖面都具有氧化大气浓度CH4的潜力 ,以表层土的速率为最大 .非淹水的耕作土壤残留的有机质层仍保留了较强的氧化大气浓度CH4潜力 ,氧化CH4速率是耕作层的 2 0倍 .淹水土壤的大部分层次不具有氧化大气浓度CH4的潜力 .所有供试土壤均能消耗高浓度CH4。
The depth distribution of CH_4 oxidation potential was investigated for soils from Sanjiang Plain. The results showed that the two unsaturated soils consumed atmospheric CH_4 quickly, and the topsoils were the most active layers. The methane uptake rates of organic horizon were 20 times higher than that of plowed layer in dryland. Most layers of the flooded soils did not have the ability to oxidize atmospheric CH_4. All the soils from the Sanjiang Plain could oxide high|concentrations CH_4 (8000?μL·L^(-1)), and the potential to oxidize CH_4 by the organic horizons with peat was higher than that of the mineral horizons.
出处
《环境科学学报》
CAS
CSCD
北大核心
2004年第5期939-941,共3页
Acta Scientiae Circumstantiae
基金
中科院知识创新工程方向性项目 (KZCX2 30 2 )
中国气象局气候研究开放实验室课题 (SZ2 0 0 3C 0 6 )
关键词
三江平原
土壤
CH4
温室气体
温室效应
methane uptake
greenhouse gases
soil
Sanjiang PlainAbstract:The depth distribution of CH_4 oxidation potential was investigated for soils from Sanjiang Plain. The results showed that the two unsaturated soils consumed atmospheric CH_4 quickl
