设施栽培土壤甲烷氧化的研究

Methane oxidation of green-house soils.

研究了设施栽培土壤的甲烷氧化 .结果表明 ,不同土壤对甲烷的氧化能力各异 ,可能与土壤的理化性质有关 ;土壤微生物是甲烷氧化的主要生物类群 :土壤含水量对甲烷氧化有明显影响 ,含水量过高或过低对甲烷氧化均具有抑制作用 ;氮源 (包括有机和无机氮源 )对甲烷氧化均有抑制作用 ;不同碳源对甲烷氧化的影响各异 ,纤维素对甲烷氧化抑制作用最小 ,而高浓度的甲醇、葡萄糖则对甲烷氧化具有强烈的抑制作用 ;在甲烷氧化过程中加入葡萄糖能迅速抑制甲烷氧化 ;在加入葡萄糖的同时保持瓶中充足的氧气 ,则这种抑制作用可以在 5 .5 d后得到解除 .此外 ,还研究了从土壤中分离的甲烷氧化菌对碳源的利用情况 ,表明在甲烷释放极少的设施栽培土壤中 。

Methane oxidation of green house soils was detected The results showed that methane oxidation ability was different in various soils and possibly it was related with the basic properties of the soils Microorganisms are the key mechanism of methane oxidation Water content of the soil could influence methane oxidation dramatically N sources experimented (including organic and inorganic N) could restrain methane oxidation C sources experimented could restrain methane oxidation Cellulose inhibited weakest while high concentration of methanol and glucose inhibited dramatically In the process of methane oxidation, glucose could restrain methane oxidation shortly after it was put into the soil, but when supplied with enough oxygen, 5 5 days later the inhibition could be relieved The C sources of a methanotroph isolated from the soil were also detected It supposed that in the greenhouse soil that released methane weakly facultative methanotrophs might be dominant in the methane oxidation