Peak of nitrogen and phosphorus uptake by intercropped soybean was delayed to some time after wheat harvesting due to intercropping, which was one of mechanism of intercropping yield advantage.

• 虽然间作大豆在前期养分吸收缓慢，在两作物共生期的氮磷钾吸收量均显著地低于单作大豆，但小麦收获后有明显的恢复。