5～6岁儿童锌需要量的探讨

A Study on Zinc Requirement in Childhood Aged 5～6 Years Old

将膳食因素与锌摄入量作多元线性回归分析 ,得出多元回归方程 :锌摄入 (mg) =- 0 42 6 + 0 0 5 3×蛋白质摄入 (g)+ 0 0 0 3×磷摄入 (mg) + 0 2 34×锌贮留 (mg) + 0 0 78×粗纤维摄入 (g) (n =2 7,P <0 0 0 1,R2 =0 92 7)。初步认为 5～ 6岁儿童每日摄入 5～ 6mg锌就能保证发育 ,这个锌摄入水平可能是目前膳食条件下锌的需要量。从多元回归方程可以看出 ,锌的需要量受膳食因素影响。各国各地区居民膳食因素不同 ,所以锌需要量也不完全一致。

Based on present Chinese dietary composition、nutritional condition and zinc metabolic balance,we suggest that 5-6mg dietary zinc intake is enough for children 5-6 years old.5-6mg zinc intake could be the zinc requirement for them at present.We gave a multiple regression formula to estimate zinc intake:Zinc intake=-0.426+0.053×protein intake(g)+0.003×phosphorus intake(mg)+0.234×zinc retention(mg)+0.078×fiber intake(g).Dietary factors influencing zinc requirements have been identified.Zinc requirements will change with the different levels of dietary factors.