Concept information
Preferred term
Definition
- 动植物食品供给的基本养分。动物获取含氮化合物,特别氨基酸。虽然空气含有接近80%的气体氮,但很少有生物有能力以此形式使用它。通常在微生物已将氮转化成氨水或硝酸盐后,高等植物从土壤中获得它并能吸收。氮的这种转换,称为固氮,对形成氨基酸即蛋白质的构件,起着至关重要的作用。
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