Abstract: [Objective] The purpose of this experiment is to measure trace mineral concentrations in the leaves of high, medium, and low yielding'Korla fragrant pear'trees at different times during the growing season.The results can be used as a reference for fertilizing pear orchards.[Method]Trace mineral concentrations were measured at different times during the growing season.Leaves were collected from Korla fragrant pear trees every two weeks from April 28 until September 23.The'Korla fragrant pear'trees were 20 to 25 years old.[Result]Leaf Fe, Cu, Zn, and B concentrations decreased during the growing season, whereas Mn and Na concentrations increased.Averaged across the growing season, leaf Fe, B, and Na concentrations were greater in high-yielding orchards than in medium-and low-yielding orchards.Leaf Cu concentrations were greatest in medium-yielding orchards.Leaf Zn and Mn concentrations were greater in the low-yielding orchards than in the medium-and high-yielding orchards.Correlation analysis showed that leaf Zn concentrations were significantly positively correlated with leaf Fe and Cu concentrations.Leaf Mn concentrations were significantly negatively correlated with leaf Cu, B, and Na concentrations.Correlation analysis also indicated that high yield was significantly positively correlated with leaf Fe concentrations on July 13, September 23, and July 28.High yield was significantly negatively correlated with leaf Cu concentrations on September 10 and with leaf Na concentrations on August 10.[Conclusion]The trees should be supplied with Cu during the early growing season.Iron should be supplied during the mid-growing season.Zinc should be supplied during the mid and late growing season.Boron should be supplied during the entire production period.Supplementation with Mn and Na is not recommended.In conclusion, the yield and quality of'Korla fragrant pear'can be increased by understanding the correlation between yield and leaf trace mineral concentrations at different times during the annual production period.

摘要： [目的]研究库尔勒香梨叶片中微量矿质元素含量的变化规律,为梨园施肥提供参考.[方法]以20~25 a生库尔勒香梨为试材,检测不同产量园库尔勒香梨一年中不同时期叶片中微量矿质元素的含量.[结果]在库尔勒香梨年生长期内,叶片中的Fe、Cu、Zn、B含量总体呈下降趋势,Mn和N总体呈上升趋势;高产园Fe、B和Na含量的年平均值较高;中产园Cu含量的年平均值较高;低产园叶片中Zn、Mn含量的年平均值较高.相关性分析表明,Zn分别与Fe、Cu含量间呈极显著正相关,Mn分别与Cu、B、Na含量间呈极显著负相关,Mn与Zn含量间呈显著负相关性;叶片中的矿质元素含量与高产的相关性分析表明,Fe分别在7月13日和9月23日、7月28日与高产存在显著正相关和极显著正相关,Cu在9月10日与高产存在极显著负相关,Na在8月27日与高产存在极显著负相关.[结论]库尔勒香梨年生产周期中,前期适当补充Cu元素,中期补充Fe元素,中后期及时补充Zn元素,长期适当补充B元素,Mn与Na元素不额外补充.根据库尔勒香梨生长发育期矿质元素动态需求的变化趋势合理施肥,达到丰产优质栽培的目的.