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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >ENVIRONMENTAL FACTORS INFLUENCING THE VARIABILITY OF METHANE OXIDATION IN TEMPERATE ZONE SOILS
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ENVIRONMENTAL FACTORS INFLUENCING THE VARIABILITY OF METHANE OXIDATION IN TEMPERATE ZONE SOILS

机译：温带区土壤甲烷氧化变化的环境因素

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摘要

The influence of organic matter and soil moisture on the spatial distribution of methane (CH4) oxidation was examined in temperate zone soils by laboratory incubations. CH4 oxidation in soil cores exhibited distinct vertical zonation with maxima at 3 to 6 cm. The kinetic parameters of CH4 oxidation were measured in soil composites, The maximum rate of CH4 uptake, V-max ranged from 6.8 to 7.4 nmol hr(-1) g dry soil(-1) and the apparent half saturation constant, K-m, ranged from 17.4 to 19.9 (parts per million by volume) ppmv. Oxidation in random samples was observed to be influenced by both soil moisture and organic matter contents. The rate of oxidation in each sample increased to a maximum with increasing water content and decreased with additional water. Maximum oxidation rates ranged from 2.2 to 9.0 nmol hr(-1) g dry soil(-1) at sample moisture contents of 18 to 51%. Organic matter content appears to explain the spatial variability of methane oxidation at optimal soil moisture contents. The oxidation maximum at this site was coincident with an organic matter content of 14% by weight and a gravimetric moisture content of 33%. [References: 19]
机译：通过实验室培养，研究了温带土壤中有机质和土壤水分对甲烷（CH4）氧化空间分布的影响。土壤核心中的CH4氧化表现出明显的垂直分区，最大值在3至6 cm。测量了土壤复合物中CH4氧化的动力学参数，CH4的最大吸收速率V-max在6.8至7.4 nmol hr（-1）g干燥土壤（-1）之间，表观半饱和常数Km从17.4至19.9（百万分之体积）ppmv。观察到随机样品中的氧化受土壤水分和有机物含量的影响。随着水含量的增加，每个样品中的氧化速率增加到最大，而增加水量则减少。在样品含水量为18％至51％时，最大氧化速率范围为2.2至9.0 nmol hr（-1）g干燥土壤（-1）。有机质含量似乎可以解释在最佳土壤水分含量下甲烷氧化的空间变异性。在该位置的最大氧化与有机物含量为14重量％和重量水分含量为33％一致。 [参考：19]

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