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。
nitrogen turnover from grazing livestock excreta is the key process in the nitrogen cycle of pasture ecosystems.
放牧家畜排泄物氮转化是草原生态系统氮循环的关键。
it is also worth noting that unlike many of humanity's other effects on the planet, the remaking of the nitrogen cycle was deliberate.
还值得注意的是,与地球上其他人类的影响不同,对于氮循环的再改造是故意的。
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 elevated atmospheric co2 has effects on the absorption of nitrogen, concentration in plant and soil, the c/n in plant and soil, the nitrogen cycle of plant and soil.
大气co2浓度升高对植物吸收氮素,以及对植物和土壤中的氮浓度、c/n比和氮循环都存在着影响。
human interference in the nitrogen cycle has made far more nitrogen available to plants and animals;
人类对于氮循环的介入已使得氮元素供大于求。