Before maize interplanting, 40% of N, all of P and K and even small amount of organic manure are used by furrow application as basal, or dressed in seedling stage after wheat harvest if operation is difficult to be put into interplanting space.

• 套种玉米前，沟施40%25氮、全部磷、钾甚至少量有机肥作为基肥，或者当施入套种带作业困难时在小麦收获后苗期追肥。