营养环境与人群营养素摄入水平的相关性

完善了营养环境的概念及指标，提出可以用线性规划建立的数学模型计算营养环境的指标，即由该模型得出的营养素的理论达标率和营养素的边际成本。用天津１９８９年的营养素的理论达标率和１９８８年天津人群的营养素实际达标率进行线性回归分析，得出回归方程：实际达标率（％）Ｙ＝１５．１５（％）＋０．７８８Ｘ（Ｘ为理论达标率，％），其相关性显著（Ｒ＝０．９８６，Ｐ＜０．００１）；还发现天津营养环境中脂肪、动物性蛋白质的边际成本大于零。讨论了上述方程的意义，营养环境与营养干预的关系。认为，改善食物的营养素含量、降低价格、增加营养素含量丰富的食物品种的营养干预措施，效果较好。

RESEARCH ON RELATIVITY BETWEEN TIANJIN NUTRITION ENVIRONMENT AND POPULATIONS INTAKE LEVEL OF NUTRIENTS

The　paper　perfected　the　concept　and　indicators　of　nutrition　environment,　raising　that　these　indicatiors　could　be　worked　out　by　the　presented　linear　programming　mathematical　model.　They　included　the　theoretical　standard reaching　rate　of　nutrients　in　the　optimum　food　pattern　and　the　fringe　cost　of　nutrients　in　a　certain　area.　A　regression　analysis　was　conducted　between　the　theoretical　standard reaching　rates　of　nutrients　and　those　rates　gained　from　a　survey　in　Tianjin　in　1988.　The　regression　equation　was:　Y=15.15(%)+0.788X(Y　was　the　actual　standard raching　rate　and　X　was　the　theoretical　standard reaching　rate　of　nutrients).　The　realtivity　was　significant　(R=0.986,P<0.001).　In　the　meantime,　it　was　also　found　that　the　fringe　coats　of　fat　and　animal　protein　were　larger　than　zero.　The　meaning　of　the　equation　was　discussed　in　detail.　Results　indicated　that　the　nutrition　environment　in　Tianjin　in　the　late　1980s,　at　least,　accounted　for　83.87　percent　of　the　populations　total　intake　of　nutrients.　The　paper　gave　a　reasonable　explanation　to　the　fact　that　the　fringe　cost　of　nutrients　could　be　used　to　assess　and　predicted　the　situation　of　populations　intake　of　nutrients,　and　pointed　out　that　Tianjin　population　would　increase　the　intake　of　fat　and　animal　protein　according　to　the　conditions　of　the　fringe　costs　of　these　two　nutrients.　The　relationship　between　nutrition　environment　and　nutriton　intervention　was　also　discussed　and　the　effect　of　the　nutrition　intervention　influencing　the　environment　was　considered　better　than　that　having　little　influence　on　it.