Results: The contents of Cu, Fe, Zn, Sr, se, Mn, As, Cd in stems were all higher than those in leaves and flowers of buckwheat.

结果：荞麦茎中铜、铁、锌、锶、硒、锰、砷、镉均高于叶和花；荞麦叶中钙、铅、汞明显高于茎和花。

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Pot experiments were conducted with maize and soybean as test crops to study the effects of application of Se, Zn, fe on crop yields and nutritional quality.

采用黄土高原低硒区典型土壤，以玉米、大豆为供试作物，研究施用硒锌铁对作物产量和营养品质的影响。

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Objective To study the content of Zn, Cu, Fe, Se in maternal blood, hair, cord blood, amniotic fluid and the relationship between each sample, the trace elements and the growth of their infants.

目的探讨分娩孕妇血液、头发、脐血、羊水中微量元素锌、铜、铁、硒的含量及其间的关系与新生几营养状况生长发育关系。

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