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.
如果人類沒有加速氮循環的速度，那麽就遠不會有衆多人對地球上做其他的各種事情。
What seems certain is that the nitrogen cycle is changing faster and more profoundly than the carbon cycle, which has attracted much more attention.
顯而易見的是，「氮循環」比「碳循環」更可怕，變遷得更快，影響也更廣泛，不過大家比較關心的卻還是「碳循環」。
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.
然後，更宏觀地來看問題，人類爲了一己私利，究竟挾持了多少程度的「氮循環」、也就是氮氣在地球大氣中進進出出的過程？

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

氮素循環
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.
城市槼模越大,氮素循環利用率越低。
環境科學技術
氮循環

氮循環
The autotrophic nitrifying bacteria play a critical role in nitrogen cycle in nature.
硝化細菌是一大類在自然界氮循環中起關鍵作用微生物菌群。
氮素循環