土壤有机质半减期 half-life of soil organic matter
氮循环 nitrogen cycle
土壤有机持分解率 decomposition rate of soil organic matter
氮转化 nitrogen transformation
英译中(Translate):biological nitrogen fixation()
固氮基因 nitrogen fixation genes
挥发性有机物指常温常压下能够挥发或气态的有机物,世界卫生组织(WHO,1989)定义熔点低于室温、沸点在()℃之间的有机物为挥发性有机物,英文Volatile Organic Compounds,简写为VOCs。
全氮 total nitrogen
硝铵态氮肥 ammonium and nitrate nitrogen fertilizer
氮肥 nitrogenous fertilizer
反应性氮中间产物(reative nitrogen intermediates,RNIs)
酰胺态氮 amide nitrogen
硝态氮 nitrate nitrogen
生物固氮作用(Biological nitrogen fixation)
氮同化作用 nitrogen assimilation
联合固氮作用 associative nitrogen fixation
土壤有机质平均停留时间 mean residence time of soil organic matter
人类很多活动都对地球生物化学循环产生影响。下列活动不会加速地球氮库游离的是()。
植物有机营养 organic nutrition of plant
铵态氮肥 ammonium nitrogen fertilizer
有机物反应活性(organic reactivity)
土壤有机质平衡 soil organic matter balance
S-containing compounds are a group of naturally occurring chemical compounds that mostly contain basic nitrogen atoms.
Which of the following are the nitrogen source of urea ?