Plateau Marsh Methane Oxidation as affected by Inorganic N

WANG Zhi-Ping; DUAN Yi; YANG Ju-Rong; LI Ling-Hao; HAN Xing-Guo

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Plateau Marsh Methane Oxidation as affected by Inorganic N

机译：无机氮对高原沼泽甲烷氧化的影响

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In a series of laboratory incubations using soils of two contrasting sites from a temperate marsh on the QinghaiTibet Plateau,potential methane (CH4) oxidation rates were measured to study the effects of inorganic N inputs on CH4 oxidation. For a drained site,subsurface peat (5-15 cm) at an initial 20 μL CH4 L-1 showed a significantly different (P＜0.05) CH4 oxidation rate compared to other soil depths,with a maximal rate of 20.9 ng CH4 gDW (dry weight)-1h-1; the underlying mineral soil layers (15-30 and 30-50 cm) also had a strong CH4 oxidation capacity at about an initial 2000 μL CH4 L-1. With a waterlogged site,the CH4 oxidation rate in an aerobic incubation was significantly greater (P＜0.05) in the surface soil layer (0-5cm) compared to the 15-30 and 30-50 cm depths. There was generally no or a very weak effect from addition of NO3- on CH4 oxidation. In marked contrast,NH4+ salts,such as (NH4)2SO4,NH4C1 and NH4NO3,exhibited strong inhibitions,which varied as a function of the added salts and the initial CH4 level. Increasing NH4+ usually resulted in greater inhibition and increasing initial CH4 concentrations resulted in less. NH4+ inhibition on CH4 oxidation in natural high-altitude,low-latitude wetlands could be as important as has been reported for agricultural and forest soils. The NH4+ effects on the CH4 oxidation rate need to be further investigated in a wide range of natural wetland soil types.

机译：在一系列实验室孵化中，使用来自青藏高原温带沼泽的两个相反部位的土壤，测量了潜在的甲烷（CH4）氧化速率，以研究无机氮输入对CH4氧化的影响。对于排水位点，初始泥浆CH4 L-1处的地下泥炭（5-15厘米）与其他土壤深度相比，CH4氧化速率具有显着差异（P ＜0.05），最大速率为20.9 ng CH4 gDW（干重）-1h-1;下方的矿物土壤层（15-30和30-50 cm）在最初约2000μLCH4 L-1时也具有很强的CH4氧化能力。在有水浸位的情况下，与15-30和30-50 cm的深度相比，在有氧培养中，表层土壤层（0-5cm）的CH4氧化速率显着更高（P ＜0.05）。通常，添加NO3-对CH4氧化没有影响或影响很小。与之形成鲜明对比的是，NH4 +盐（如（NH4）2SO4，NH4Cl和NH4NO3）表现出强烈的抑制作用，其抑制作用随所添加的盐和初始CH4水平而变化。 NH4 +的增加通常会产生更大的抑制作用，而初始CH4浓度的增加会导致减少作用。在自然的高海拔，低纬度的湿地中，NH4 +对CH4氧化的抑制作用可能与农业和森林土壤中报道的一样重要。在广泛的天然湿地土壤类型中，需要进一步研究NH4 +对CH4氧化速率的影响。

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来源
《土壤圈（英文版）》 |2004年第2期|195-204|共10页
作者
WANG Zhi-Ping; DUAN Yi; YANG Ju-Rong; LI Ling-Hao; HAN Xing-Guo;
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作者单位

Laboratory of Quantitative Vegetation Ecology,Institute of Botany,Chinese Academy of Sciences,Beijing,100093,China;

State Key Laboratory of Gas Geochemistry,Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou,730000,China;

State Key Laboratory of Gas Geochemistry,Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou,730000,China;

College of Resource and Environment,Beijing,Normal University,Beijing,100875,China;

Laboratory of Quantitative Vegetation Ecology,Institute of Botany,Chinese Academy of Sciences,Beijing,100093,China;

Laboratory of Quantitative Vegetation Ecology,Institute of Botany,Chinese Academy of Sciences,Beijing,100093,China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
ammonium; inhibition; inorganic N; methane oxidation; plateau marsh;

机译：铵盐;抑制作用;无机氮;甲烷氧化;高原沼泽;

Plateau Marsh Methane Oxidation as affected by Inorganic N

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