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６～７岁的儿童１２０人，男、女各半，随机分为３组：（１）补锌（Ｚｎ）组；（２）补锌加复合微量营养素（Ｚｎ＋Ｍ）组；（３）补复合微量营养素（Ｍ）组。试验期１０周，观察儿童血清锌、膝高和身高的变化。结果显示：试验各组血清锌均显著升高，血清锌增加值依次是Ｚｎ＋Ｍ、Ｍ组、Ｚｎ组，两两组间均有显著性差异；膝高和身高增长值与血清锌变化趋势一致，膝高增长值两两组间均有显著性差异，而身高增长值Ｚｎ＋Ｍ组与Ｍ组间无显著性差异。其余两两间有显著性差异：膝高和身高呈极显著正相关。提示，对儿童血清锌、膝高和身高影响最为明显的是Ｚｎ＋Ｍ组，这对今后合理选择儿童补锌方法有一定的指导意义，同时膝高作为一项反映儿童线性生长变化的新指标比传统的身高指标要优越，值得推广运用。
120 children aged 6-7 years old, half male and half female, were randomly divided into three groups: (1) zinc supplementation group; (2) zinc supplementation combined with micronutrients (Zn + M) group; Micronutrient (M) group. During the experimental period of 10 weeks, the changes of serum zinc, knee height and height in children were observed. The results showed that the levels of serum zinc were significantly increased in each experimental group, and the added value of serum zinc was Zn + M, M group and Zn group in turn. There was a significant difference between the two groups. The growth of knee height and height were consistent with that of serum zinc, Knee height growth value between the two groups were significantly different, while height growth value Zn + M group and M group no significant difference. The remaining two two significant differences: knee height and height were extremely significant positive correlation. These results suggest that Zn + M group has the most significant effect on serum zinc, knee height and height of children, which is helpful for the rational selection of children’s zinc supplementation method in the future. At the same time, Knee height is a new indicator reflecting the change of children’s linear growth, The height index should be superior, it is worth to promote the use of.