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本文报道了北京城区、近郊、远郊及江西某农村91名分娩后1～6个月乳母乳汁中蛋白质及氯基酸含量。结果表明:(1)江西农村乳母每日摄入的蛋白质量远低于北京地区乳母,其乳汁中含氮量亦较北京地区母乳的为低,但氨基酸总量(18种氨基酸之和)则无显著差异。(2)据氨基酸总量得到的每100g母乳中真正蛋白质含量在四个调查点分别为0.98,1.04,1.01和0.96g。(3)母乳蛋白质中多数氨基酸含量在四个调查点无显著差异。江西乳母乳汁中酪、赖及异亮氨酸含量较低。(4)婴儿自出生三个月后,每日从母乳中获得的必需氨基酸量,除组与色氨酸外,均达不到我国暂用的婴儿氨基酸需要量标准,但婴儿体重正常。因此,该标准是否过高值得考虑。
This paper reports the contents of protein and chloride in breast milk of 91 lactating women aged 1-6 months after delivery in Beijing urban area, suburbs, outer suburbs and a rural area in Jiangxi province. The results showed that: (1) The amount of protein in daily intake of rural nursery in Jiangxi was much lower than that of lactation in Beijing. The nitrogen content in milk was also lower than that in Beijing, but the total amount of amino acids (the sum of 18 kinds of amino acids) No significant difference. (2) The true protein content per 100 g of breast milk, based on the total amount of amino acids, was 0.98, 1.04, 1.01 and 0.96 g at the four survey points, respectively. (3) There was no significant difference in most amino acids in breast milk protein among the four survey points. Jiangxi lactating milk in cheese, Lai and isoleucine content is low. (4) After three months of birth, the amount of essential amino acids obtained from breast milk daily, except the group and tryptophan, did not reach the standard of infant’s amino acid requirement in China temporarily, but the weight of the baby was normal. Therefore, whether the standard is too high is worth considering.