nitrogen cycle [土壤] 氮循环 ; 氮素循环 ; 氮化合物循环 ; 氮轮回
the nitrogen cycle 氮循环 ; 氮素循环 ; 循环
nitrogen cycle bacteria 氮循环茵 ; 氮循环菌
carbon nitrogen cycle 碳循环 ; 碳
carbon-nitrogen cycle [天物] 碳氮循环
soil carbon and nitrogen cycle 土壤碳和氮循环
biogeochemical nitrogen cycle 生物地球化氮循环
soil nitrogen cycle 氮素循环
global nitrogen cycle 全球氮循环
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。
参考来源 - 城镇化对我国食物消费系统氮素流动和农田氮素循环的影响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·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N the natural circulation of nitrogen by living organisms. Nitrates in the soil, derived from dead organic matter by bacterial action, are absorbed and synthesized into complex organic compounds by plants and reduced to nitrates again when the plants and the animals feeding on them die and decay 氮循环 →see nitrification, nitrogen fixation
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。
There would be nowhere near as many people doing all sorts of other things to the planet if humans had not sped the nitrogen cycle up.
如果人类没有加速氮循环的速度，那么就远不会有众多人对地球上做其他的各种事情。
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