土壤中的氮素主要以有机氮的形式存在于土壤有机质中， 土壤碳氮比与有机质含量显著相关。

The N in the SOM existed mainly in the form of organic nitrogen, and the soil C:N was significantly correlated with SOM.

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本文论述了甲醇、蔗糖、报纸等不同物质作为碳源及其碳氮比对反硝化过程的影响，并对各碳源适宜的碳氮比加以总结。

The objective of this paper is to introduce the influence of different carbon source, such as methanol, sucrose, glucose and newspaper etc and the effect of C/N ratio on denitrification, .

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碳氮比随海拔升高而升高，在土壤剖面中的分布随植被类型不同而有所差异。

The soil C:N increased with the increase of the elevation, but its vertical distribution in the soil profile varied with different vegetation types.

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