三麦返青后,新根、新叶陆续生长,二次分蘖进入高峰,为了提高分蘖成穗率,培育壮秆大穗,三麦返青肥应遵循“三查、三定、一看”的原则。一、查苗情,定施肥种类返青肥是承上启下决定穗足、穗大、壮秆、倒伏的一次关键性追肥,要立足踏田考查,根据不同苗情素质、分类指导,具体原则是:促晚、弱 Three wheat turn green, new roots, new leaves one after another growth, secondary tillering peak, in order to increase the tillering rate of ear, cultivating big stalk big spike, three wheat return to green manure should follow the “three check, three set, one look” principle . First, the investigation of Miao situation, the type of fertilizer Fertilizer is turned into a decision to accept the spike foot, spike large, stalwart stubborn lodging a key top-dressing, based on field test, according to the quality of different seedlings, classification guide, the specific principle is: Late, weak