Nitrogen for plant nutrition is mainly obtained from three sources: nitrogen-fixing plant, rain water and manure.

氮素是植物必要的营养元素之一，其主要来源有：生物固氮作用、降雨和灌溉水以及人工施肥。

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The effect of cellulose-decomposing fungus(CDF) mixed with associative nitrogen-fixing bacterium(ANFB) to cellulose-decomposing has been studied.

从纤维素分解菌与联合固氮菌的接种配比，研究了混合培养对滤纸分解的影响。

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Actinorhizal Plants are a kind of important natural nitrogen-fixing resources, and they have high value in reforestation as pioneer and accompanying species.

放线菌根瘤植物是自然界中一类重要的固氮资源，作为先锋树种和伴生树种在造林中有重要的应用价值。

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He acknowledged that any soil used to grow nitrogen-fixing plants or were fertilised for agricultural reasons would result in an increase in gases involved in the formation of ozone.

BBC: Invasive plant 'increases ozone pollution'

Fossil fuel burning and fertiliser manufacture now take more nitrogen from the atmosphere than all of the planet's nitrogen-fixing microbes - and there are a lot of those bugs out there.

BBC: Leaving our mark: Fossils of the future