目的探讨山东乐陵产金丝小枣和大枣中微量元素的含量。
Objective: To discuss the contents of trace elements of in zizyphus jujube and big jujube Laoling Shandong.
在成土过程中，土壤微量元素的含量分布具有一定的规律性。
The contents and distribution of soil microelement follow certain regularity in the process of soil-forming.
研究表明，传统的水果和蔬菜种植方法会使微量元素的含量下降。
Research shows a decline in the trace mineral content of fruits and vegetables grown in the conventional method.
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