为了掌握不同树龄库尔勒香梨树体的养分平衡特征，从而为库尔勒香梨园的科学施肥提供技术指导，选择新疆特色果树库尔勒香梨作为研究对象，测定了不同树龄段库尔勒香梨叶片的养分含量，并统计分析了其叶片养分含量的变化特征。结果表明：库尔勒香梨叶片中的氮含量随着树龄的增加而减小，钾含量随着树龄的增加而增大，磷、镁含量均随着树龄的增加先减小后增大，钙含量随着树龄的增加先增大后减小，铁、锰、铜、锌的含量均随着树龄的增加而表现出增加—减小—增加的变化趋势；不同树龄段之间，随着库尔勒香梨树龄的增加叶片氮、磷、钾、铁、锰、铜含量间的差异均逐渐减小，而其钙含量间的差异却显著，镁、锌含量间的差异不显著；不同树龄段库尔勒香梨叶片养分含量的变化表现基本一致，叶片氮、磷、镁、铜、锌的含量均处于梨叶片营养元素适宜含量范围内，钾、铁含量均高于梨叶片营养元素适宜含量的上限值，锰含量低于梨叶片营养元素适宜含量的下限值，钙含量处于梨叶片营养元素缺乏状态。%In order to grasp the nutrient balance characteristics of Korla fragrant pear tree body at different tree ages, and guide scientifically fertilization of Korla fragrant pear orchard, using Korla fragrant pear of special fruit trees in Xinjiang as research subject, nutrient contents in Korla fragrant pear leaves at different tree ages were determined, and the variation characteristics of nutrient contents in leaves were analyzed. The results showed that with increasing tree ages, the nitrogen content in Korla fragrant pear leaves was gradually reduced, the potassium content was gradually increased, the phosphorus and magnesium contents were firstly decreased and then increased, the calcium content were firstly increased and then decreased, and the iron, manganese, copper and zinc contents showed the trends of increased-decreased-increased. With increasing tree age of Korla fragrant pear, the differences of nitrogen, phosphorus, potassium, iron, manganese and copper contents were gradually reduced between different tree ages, the differences of calcium contents were significant, and the differences of magnesium and zinc contents were not significant. The nutrient contents in leaves were basically identical between different tree ages, the nitrogen, phosphorus, manganese, copper and zinc contents in leaves were at the suitable range, the potassium and iron contents were higher than the upper limit value of the suitable range, manganese contents in leaves were lower than the lower limit value of the suitable range, and calcium contents were at deficiency state.
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