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方法：试验分为三组：单纯补锌组（Ｚ），同时补锌＋微量营养素组（Ｚ＋Ｍ），补微量营养素组（Ｍ）。结果：试验前发锌平均含量为２．２８±０．７４μｍｏｌ／ｇ，低于正常值下限共２４人，占受试总人数的２２．２２％。发锌含量与智商呈显著正相关（ｒ＝０．２２９，Ｐ＜０．０５，ｎ＝１０８）。补充试验后三个组发锌变化无显著性差别。Ｚ＋Ｍ组和Ｍ组智商，认知功能的改善好于Ｚ组，Ｚ＋Ｍ组和Ｍ组的差别无统计学意义。膝高的增长值Ｚ＋Ｍ组高于Ｍ组和Ｚ组，Ｍ组高于Ｚ组。结论：受试儿童中锌缺乏并不占主要地位，其他微量营养素的缺乏更应受到重视。同时补充锌和微量营养素可以改善儿童的智能发育，并能促进体格发育。
Methods: The experiment was divided into three groups: simple zinc supplementation group (Z), zinc supplementation + micronutrient group (Z + M), supplemental micronutrient group (M). Results: The average content of zinc before experiment was 2.28 ± 0.74μmol / g, which was lower than the lower limit of normal, a total of 24 people, accounting for 22.22% of the total number of subjects. Hair zinc content was positively correlated with IQ (r = 0.229, P <0.05, n = 108). There was no significant difference between the three groups after zinc supplementation. Z + M group and M group IQ, cognitive function improved better than Z group, Z + M group and M group, the difference was not statistically significant. The knee height growth value of Z + M group was higher than that of M group and Z group, M group was higher than Z group. Conclusion: The deficiency of zinc in the tested children does not occupy the main position. The deficiency of other micronutrients should be paid more attention. At the same time zinc supplementation and micronutrients can improve children’s intellectual development, and can promote physical development.