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采用锌代谢平衡法，测定１１名锌营养正常的学龄前儿童在平衡膳食干预前后锌营养有关指标及锌代谢。结果提示，经过三周平衡膳食干预，粪锌、尿锌及体表锌排出量与膳食锌摄入量呈显著正相关，粪锌、尿锌排出量随膳食锌摄入量的显著增加而增加，差异显著（Ｐ＜０．０５），锌代谢确实达到一稳定水平，其锌吸收量即为他们的锌需要量，平均为１．８４±０．４７ｍｇ／ｄ。如果锌吸收率以２０％计，则锌膳食供给量为９．２３±２．３５ｍｇ／ｄ。在锌代谢研究中首次测定在自然状态下儿童体表及头发排锌量，平衡膳食条件下分别为０．２７±０．０９ｍｇ／ｄ、５．２６±２．４９μｇ／ｄ。体表排锌量占锌总排出量的５％，仅次于粪锌排出量，占第二位，提示在锌需要量及膳食锌供给量研究中不可忽视这部分锌的损失。
Using zinc metabolism balance method, 11 zinc nutrition normal preschool children were measured before and after dietary intervention of zinc nutrition related indicators and zinc metabolism. The results showed that after three weeks of balanced dietary intervention, excretion of zinc, urine zinc and body surface zinc had a significant positive correlation with dietary zinc intake. Excretion of excrement zinc and urine zinc increased with dietary zinc intake significantly increased , The difference was significant (P <0.05). The zinc metabolism did reach a steady level, and the zinc absorption amount was their zinc requirement, with an average of 1.84 ± 0.47mg / d. If the zinc absorption rate is 20%, then the zinc diet supply is 9.23 ± 2.35 mg / d. In the study of zinc metabolism, it was the first time to determine the amount of zinc released from the body surface and the hair of the children in the natural state, which were respectively 0.27 ± 0.09mg / d and 5.26 ± 2.49μg / d under the balanced dietary conditions. The amount of surface zinc excretion accounted for 5% of the total zinc excretion, second only to excretion of zinc and zinc, accounting for the second place, suggesting that the zinc demand and dietary zinc supply can not be ignored in this part of the loss of zinc.