The results showed that the N uptake curve of crops was a single peak during the whole growth stage, the N maximum uptake stages of wheat and broad bean were anthesis and jointing stage separately.

• 结果表明,在小麦蚕豆间作的整个生育期内,作物的氮吸收量呈单峰曲线变化,小麦、蚕豆对氮的最大需求高峰分别在开花期和拔节期。