全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

不同区域森林表层土壤甲烷和乙烯氧化特性及影响机制

Keywords: 甲烷,乙烯,氧化,森林土壤,微生物量,溶解性有机碳氮

Full-Text   Cite this paper   Add to My Lib

Abstract:

采集我国长白山、西双版纳和鼎湖山森林表层土壤(5cm),通过一系列实验室培养来研究不同区域典型森林土壤甲烷和乙烯氧化潜势、差异机制以及乙烯对甲烷氧化的影响效应。结果表明,温带森林土壤甲烷和乙烯氧化速率高于热带与亚热带土壤,并具有较高的最大甲烷氧化速率(Vmax)。所有森林土壤甲烷氧化的半饱和常数(Km)变化范围较大,从而显示不同区域以及同区域不同植被下土壤甲烷氧化特性具有差异性。通过比较在相同起始碳浓度时热带不同土地利用、热带与亚热带森林以及温带不同林型土壤甲烷和乙烯氧化特性的差异,发现甲烷氧化对土地利用、气候条件与植被变化的敏感度显著高于乙烯氧化。在高浓度乙烯(约20μLC2H4·L-1)存在时,发现所选择的不同区域森林土壤氧化大气本底甲烷潜势均被抑制,抑制率为83%~100%,尤其是热带土壤。因子分析和回归分析显示,影响这些森林土壤甲烷和乙烯氧化的主要因子是水/盐溶性有机碳和有机氮以及微生物碳氮。

References

[1]  IPCC.Climate change 2001[M].Cambridge:Cambridge University Press,2001.248-251.
[2]  徐星凯,袁斌,王跃思,等.土壤乙烯产生和氧化的研究进展[J].生态学报,2005,25(12):3354-3358.
[3]  Zechmeister-Boltenstern S,Nikodim L.Effect of water tension on ethylene production and consumption in montane and lowland soils in Austria[J].Eur J Soil Sci,1999,50:425-432.
[4]  Jackel U,Schnell S,Conrad R.Microbial ethylene production and inhibition of methanotrophic activity in a deciduous forest soil[J].Soil Biol Biochem,2004,36:835-840.
[5]  Xu X K,Inubushi K.Production and consumption of ethylene in temperate volcanic forest surface soils[J].Eur J Soil Sci,2007,58:668-679.
[6]  Kim H T.Soil sampling,preparation and analysis[M].New York:Marcel Dekker,1995.
[7]  Vance E D,Brookes P C,Jenkinson D S.An extraction method for measuring soil microbial biomass C[J].Soil Biol Biochem,1987,19:703-707.
[8]  Brookes P C,Landman A,Pruden G,et al.Chloroform fumigation and the release of soil nitrogen:a rapid direct extraction method to measure microbial biomass in soils[J].Soil Biol Biochem,1985,17:837-842.
[9]  Wu J,Brooks P C,Jenkinson D S.Evidence for the use of a control in the fumigation-incubation method for measuring microbial biomass carbon in soil[J].Soil Biol Biochem,1996,28(4):511-518.
[10]  Steudler P A,Bowden R D,Melillo J M,et al.Influence of nitrogen fer tilization on methane uptake in temperate forest soils[J].Nature,1989,341:314-316
[11]  肖冬梅,王淼,姬兰柱,等.长白山阔叶红松林土壤氮化亚氮和甲烷的通量研究[J].应用生态学报,2004,15(10):1855-1859.
[12]  莫江明,方运霆,李德军,等.鼎湖山主要森林土壤CO2排放和CH4吸收特征[J].广西植物,2006,26(2):142-147.
[13]  周国逸,闰俊华.鼎湖山区域大气降水特征和物质元素输入对森林生态系统存在和发育的影响[J].生态学报,2001,21(12):2002-2012.
[14]  Amaral J A,Ren T,Knowles R.Atmospheric methane consumption by forest soils and extracted bacteria at different pH values[J].Appl Environ Microbiol,1998,64:2397-2402.
[15]  Xu X K,Inubushi K.Effects of N sources and methane concentrations on methane uptake potential of a typical coniferous forest and its adjacent orchard soil[J].Biol Fertil Soils,2004,40:215-221.
[16]  Bender M,Conrad R.Kinetics of methane oxidation in oxic soils[J].Chemosphere,1993,26:687-696.
[17]  Rigler E,Zechmeister-Boltenstern S.Oxidation of ethylene and methane in forest soils-effect of CO2 and mineral nitrogen[J].Geoderma,1999,90:147-159.
[18]  Xu X K,Han L,Wang Y S,et al.Influence of vegetation types and soil properties on microbial biomass carbon and metabolic quotients in temperate volcanic and tropical forest soils[J].Soil Sci Plant Nutr,2007,53:430-440.
[19]  李俊,同小娟,于强.不饱和土壤CH4的吸收与氧化[J].生态学报,2005,25(1):141-147.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133