英 [ˈnaɪtrədʒən saɪkl] 美 [ˈnaɪtrədʒən saɪkl]
氮循环：一种连续的自然过程，其中氮从空气中经过一系列的过程，依次通过土壤、生物体，再回到空气或土壤中，主要涉及氮固定、硝化、腐烂和反硝化。
nitrogen cycle //
the circulation of nitrogen; nitrates from the soil are absorbed by plants which are eaten by animals that die and decay returning the nitrogen back to the soil
氮素循环-引用次数：14
Instead,if the population is concentrated in small and medium-sized cities or small towns,there would be 179,000 tons or 534,000 tons pure nitrogen returning to farmland. The larger size of the city decreases the lower the utilization rate of nitrogen cycle.
城市规模越大,氮素循环利用率越低。
氮循环-引用次数：20
氮循环-引用次数：5
The autotrophic nitrifying bacteria play a critical role in nitrogen cycle in nature.
硝化细菌是一大类在自然界氮循环中起关键作用微生物菌群。
参考来源硝化细菌应用技术研究
氮素循环
氮素循环
...态氮（铵盐）和硝态氮（硝酸盐）。空气的氮，只有通过细菌的固氮作用，转换成氨和硝酸盐后，由植物吸收。 氮循环(Nitrogen Cycle)是大自然生物圈内基本的物质循环之一，大气中的氮经微生物作用进入土壤，为动植物所利用，最终又在微生物的参与下返回大气中，如...
关键词： 农业生态系统；氮素循环；进展 [gap=11128]Key words: agroecosystem; nitrogen cycle; progress
N-CYCLE=氮化合物循环 (Nitrogen Cycle) 水族缸内的细菌是从食物、鱼儿及生物的排泄物、枯萎植物及动物尸体 .
氮轮回（nitrogen cycle）是指氮在生物与情形之间的一种轮回关系，它首要依靠微生物之间的浸染为动力来完成的，首要共由四种微生物的生化浸染所组成，分袂...
You said that the nitrogen cycle is also an important nutrient cycle.
你说了，氮循环也是一个重要的营养循环。
The three most important nutrient recycles are the nitrogen cycle, the carbon cycle and the one we are going to talk about today, the Phosphorus cycle.
这三种最重要的营养循环包括氮循环、碳循环和我们今天要讲的磷循环。
No Dickensian insights are necessary to appreciate the scale of human intervention in the nitrogen cycle.
在理解人类对氮循环的干扰力度方面，并非是杞人忧天。
The causes are man made and have come to dominate Nature's global nitrogen cycle.
Eating meat is the dominant driver of the nitrogen cycle in Europe.
And according to the Planetary Boundaries concept, the nitrogen cycle is already one of the places where humanity has already broken through the "safe limit".