These data demonstrate that magnitude of nodulation response to N may differ between species but despite these differences, legumes will reduce BNF when N availability increases.

• 这些数据还表明，结瘤对氮反应的程度在不同种间而有不同。但尽管存在这些差异，在氮水平增加时豆类作物均将减少生物固氮。