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以3、5、7年种植年限枣园土壤为研究对象,按照枣树冠幅内、外一周取0~20cm和20~40cm各4个土样混合,分析土壤微量元素含量,并对不同年限土壤微量元素含量变化特征进行研究。结果表明:3、5、7年果园中土壤微量元素中有效硼、铜、铁、锰、锌随着种植年限而降低,但随着枣树的生长,深层土壤微量元素下降反而能更为迅速;冠幅外土壤微量元素均高于冠幅内,随着枣树的生长,尤其是5年生长期后的枣树,更应加强对微肥的实施。
Taking jujube orchard soil with 3, 5, 7 years of planting as the research object, four soil samples of 0 ~ 20cm and 20 ~ 40cm were collected according to the inside and outside of the crown of the jujube, and the contents of trace elements in the soil were analyzed. Trace elements content characteristics of the study. The results showed that available boron, copper, iron, manganese and zinc in soil trace elements in orchard decreased in 3-5 years and 7 years, but with the growth of jujube trees, the trace elements in deeper soil could be more rapidly decreased . The contents of trace elements in crown soil were higher than those in crown. With the growth of jujube tree, especially the jujube tree after 5 years of growth, the application of micro-fertilizer should be strengthened.