研究了梅州沙田柚 (Citrusgrandisvar shatinyuHout )叶片、果实在各时期的矿质元素含量变化。结果表明 ,沙田柚在年周期中 ,树体的营养元素含量随着物候期表现出明显的季节性变化 ,说明沙田柚的栽培必须按各物候期、迎合沙田柚对营养要求 ,适时地、适量地供给各种养料 ;根据成熟果实中N、P的吸收量可推算出其全年所需的施氮、磷施肥量。 The contents of mineral elements in leaves and fruits of Citrus grandis var shatinyu Hout in different periods were studied. The results showed that in the annual cycle of Shatian pomelo, the nutrient elements content of the tree showed obvious seasonal changes with the phenophase, which indicated that the cultivation of Shatian pomelo must meet the nutrition requirements of Shatian pomelo at various phenophases, timely, moderately To provide a variety of nutrients; based on the absorption of N, P in mature fruits can calculate the amount of nitrogen and phosphorus fertilizer needed for the whole year.