nitrogen cycle

基本解释

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。
What seems certain is that the nitrogen cycle is changing faster and more profoundly than the carbon cycle, which has attracted much more attention.
显而易见的是，「氮循环」比「碳循环」更可怕，变迁得更快，影响也更广泛，不过大家比较关心的却还是「碳循环」。
The broader issue, therefore, is the extent to which humanity has hijacked the “nitrogen cycle”, as the passage of that gas into and out of the atmosphere is known, for its own use.
然后，更宏观地来看问题，人类为了一己私利，究竟挟持了多少程度的「氮循环」、也就是氮气在地球大气中进进出出的过程？

It points out, though, that there is little evidence things like the behaviour of the nitrogen cycle or the phosphate cycle in the Holocene were particularly well-suited to humans.
ECONOMIST: The global environment
The fact that people have used industrial chemistry to short-circuit the nitrogen cycle, by making fertilisers out of nitrogen in the air at a rate which greatly exceeds what natural systems can manage, has real environmental effects.
ECONOMIST: The global environment
If you're going to be an effective and profitable farmer, nitrogen fertilizers must be applied at every crop cycle.
FORBES: Page 3 of 4

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 &rarrsee nitrification , nitrogen fixation

氮素循环
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。
环境科学技术
氮循环

氮循环
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。
氮素循环