盐度对热带稻田土壤中甲烷生成及相关微生物群落的影响。
Influence of salinity on methanogenesis and associated microflora in tropical rice soils.
作者信息
Pattnaik P, Mishra S R, Bharati K, Mohanty S R, Sethunathan N, Adhya T K
机构信息
Division of Soil Science & Microbiology, Central Rice Research Institute, Cuttack, Orissa, India.
出版信息
Microbiol Res. 2000 Sep;155(3):215-20. doi: 10.1016/S0944-5013(00)80035-X.
In a laboratory incubation study, methane (CH4) production in two saline soils and a nonsaline soil sample was investigated under flooded conditions. Mean CH4 production was remarkable (630.86 ng CH4/g) in nonsaline alluvial soil, but low (12.97 ng CH4/g) in acid sulfate saline (Pokkali) soil which was attributed to the high sulfate content of the later. CH4 production was also low in the coastal saline (Canning) soil (142.36 ng CH4/g) but increased upon leaching the soil of its salt content. Addition of salts to the nonsaline alluvial soil at 4, 8, 16 and 20 dS/m progressively decreased CH4 production. The inhibition of CH4 production was related to low microbial activities as reflected by decreased microbial biomass C and low soil microbial population including that of methanogens.
在一项实验室培养研究中，研究了两种盐渍土和一个非盐渍土样品在淹水条件下的甲烷（CH₄）产生情况。非盐渍冲积土中的平均CH₄产量显著（630.86 ng CH₄/g），但酸性硫酸盐盐渍土（Pokkali土）中的产量较低（12.97 ng CH₄/g），这归因于后者的高硫酸盐含量。沿海盐渍土（Canning土）中的CH₄产量也较低（142.36 ng CH₄/g），但其盐分被淋溶后产量增加。在第4、8、16和20 dS/m时向非盐渍冲积土中添加盐分，CH₄产量逐渐降低。CH₄产量的抑制与微生物活性降低有关，这表现为微生物生物量碳减少以及包括产甲烷菌在内的土壤微生物数量减少。
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