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应用氮肥后移技术要注意的是:应在较高的土壤肥力(产量5250千克/公倾以上)条件下运用该技术;应在正常栽培条件下运用该技术,晚茬弱苗、群体不足等麦田不宜采用,具体技术总结如下几点。1.施肥期氮肥后移延衰高产栽培技术,主要是将氮素化肥的底肥比例减少50%,追肥比例增加50%;土壤肥力高的麦田底肥比例为30%~50%,追肥比例为50%~70%。2.备播期2.1培肥地力实行氮肥后移技术,必须以
It should be noted that the technique of nitrogen removal should be used under conditions of higher soil fertility (above 5,250 kg / bar); this technique should be applied under normal conditions of cultivation, with weak seedlings, undernourishment, etc. Wheat field should not be used, the specific technical summary of the following points. 1. fertilization period of post-conversion of nitrogen fertilizer high yield cultivation techniques, the main fertilizer is to reduce the proportion of nitrogen fertilizer 50%, the proportion of top dressing increased 50%; high soil fertility of wheat at the end of the proportion of 30% to 50%, top dressing ratio of 50 % ~ 70%. 2. Prepared sowing period 2.1 Fertility Fertility Landslide technology, must be