近年来我国化肥施用量迅速增长,但同时出现了一些高产区有盲目增加施肥量的趋势,而低产区施肥量又不足;氮、磷、钾肥施用比例失调现象也较为严重.这些原因不同程度地降低了施肥效益.最近,国内对这一问题开展了多方面研究,主要有以养分平衡法为理论基础的作物需肥量的研究;建立氮磷钾配合施用的施肥效应函数式的田间试验;研究 In recent years, China’s chemical fertilizer application rate increased rapidly, but at the same time there are some high-yielding areas blindly increasing the amount of fertilizer trends, while the low-yielding areas and the amount of fertilizer is insufficient; the proportion of nitrogen, phosphorus and potassium fertilizer imbalances are more serious. To reduce the benefits of fertilizers.Recently, the domestic carried out a multifaceted research on this issue, mainly based on nutrient balance method for the study of the amount of fertilizer required to establish the application of nitrogen, phosphorus and potassium fertilization effect of field experiments ;the study