摘要
测定了苹果、麦麸、卷心菜、胡萝卜和梨5种食物的中性洗涤剂纤维(NDF),酸性洗涤剂纤维(ADF)、纤维素、半纤维素和木质素含量,研究其增加大鼠粪干重的作用及消化率。结果表明:2.5％的NDF水平时大鼠粪干重比对照组平均增加1.27倍。个体分析发现粪干重受NDF和纤维素摄入量的影响,回归方程为(?)=-1.9040+3.5644X_1(NDF)+1.2450X_2(纤维素)。5种食物中胡萝卜的膳食纤维(DF)成分消化率较高。实验食物的半纤维素消化率平均为纤维素的1.3倍。木质素对DF降解有不同程度的影响,半纤维素可能对纤维素消化有抑制作用。不同食物DF消化率的变化还要考虑食物和DF的物理和生物学特性。
The 5 foods, apple, bran, cabbage, carrot and pear, were fed to rats as part of 5 diets each containing 2.5% neutral detergent fiber (NDF) and the effect on increasing dry stool weight (DSW) and the digestibility of dietary fiber (DF) components of the foods were studied. The results showed that DSW increased with increased NDF intake, cabbage being the most effective. The mean DSW of the test food groups was 2.27 times compared with non-fiberous controls. The SDW was correlated with intake of NDF and cellulose from analysis of individual variation. The regression equation was y =- 1.9040 + 3.5644X1 (NDF) + 3.5644X2 (cellulose).The digestion of DF components from carrot was the most complete, while hemice-llulose was 1.3 times as digestible as cellulose. Lignin was found to have an influence on DF breakdown. Increasing hemicellulose level might decrease the digestibility of cellulose. The variation of DF digestibility of di- fferent food may also be ascribed to the physical and biological properties of the food.
出处
《营养学报》
CAS
CSCD
北大核心
1990年第4期390-397,共8页
Acta Nutrimenta Sinica
关键词
膳食纤维
消化率
粪便重量
dietary fiber digestibility stool weight
