Yield advantage of spring wheat/ spring maize intercropping, however, was apparent with only fertilization, and would be more advantage when maize was mulching at same time.

• 而小麦/玉米间套作在施氮、玉米不覆膜条件下就有明显的间套作产量优势,在施氮、玉米覆膜条件下间套作产量优势更加显著。