Globally, BNF via the legume-rhizobia symbiosis is the most important biological source of plant nutrients to agriculture, supplying more than 35 million tons of N to crops annually.

• 在全球范围内，通过豆科-根瘤菌的共生体进行生物固氮是农业中最重要的养分源，它每年能提供给作物大约3500万吨的氮素。