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目前,化肥施用确实存在用量日益增加、肥效不断降低的问题,但从现有科研成果来看,已经具备了“用好化肥、提高肥效”的理论和技术,归纳有如下几个方面。 一、调整化肥结构,氮磷钾肥配合施用 所谓化肥结构,是指现有化肥中氮、磷、钾肥的比例。生产上现存的“氮多、磷少、缺钾、无微肥”状态,既不符合农作物对营养的需要,也不能满足培肥土壤的要求,无论是化肥生产部门或使用化肥的农业生产单
At present, the application of chemical fertilizers does exist the problem of increasing dosage and decreasing fertilizer efficiency. However, judging from the existing scientific research results, the theory and technology of “making good use of fertilizers and improving fertilizer efficiency” have been summarized, and the following aspects are summarized. First, adjust the structure of fertilizers, nitrogen, phosphorus and potassium fertilizer with the so-called chemical fertilizer structure, refers to the existing fertilizer nitrogen, phosphorus and potassium ratio. Production of the existing “nitrogen and phosphorus less, potassium, non-micronutrient” state, neither meet the nutritional needs of crops, it can not meet the requirements of fertilizing soil, whether it is the fertilizer production sector or the use of fertilizer, agricultural production single