采用叶分析技术进行果树营养诊断指导施肥,在生产上已得到广泛应用。但是,叶分析结果是否准确,能否指导施肥,将取决于两个关键因素,即所用诊断指标和采样技术是否合理。本文综述了国内外果树营养诊断的理论与实践,并深入探讨了叶分析技术在果树营养诊断中存在问题等一系列重要 The use of leaf analysis of fruit tree nutrition diagnosis and guidance of fertilization, has been widely used in production. However, whether leaf analysis is accurate or not will depend on two key factors, namely, whether the diagnostic indicators used and sampling techniques are reasonable. This review summarizes the theories and practices of fruit tree nutrition diagnosis at home and abroad, and discusses in depth a series of important issues in the fruit tree nutrition diagnosis such as leaf analysis