根据国内外有关报导和作者的研究就钾素对果树的作用机理、施后对果树的影响、适宜用量、时期、方法以及与磷、氮配施比和钾肥品种选择等方面，作了较为详细的介绍和讨论。并就我国当前围绕提高果实品质对策中，确认采取以增施钾肥为中心的平衡施肥重要性以及钾肥在我国果树生产中应用前景作了详述。 According to the domestic and foreign reports and authors’ research, the mechanism of action of potassium on fruit trees, the effect of post-application on fruit trees, the suitable amount, period and method, and the selection of phosphorus and nitrogen fertilizers and the choice of potash fertilizer were detailed Introduction and discussion. In the current round of measures to improve the quality of fruits in our country, to confirm the importance of balanced fertilization by increasing potassium fertilizer as the center, and potash fertilizer application prospects in our country made a detailed description.