The present studies were carried out to observe the nutritional effects of three kinds of locally produced dried infantile formula milk (DFM) and one fermented milk (FM).
A feeding trial with 60 male growing albino rats weighing 60^70 grams was conducted. during 6 weeks to compare the nutritive values and protein qualities of three DFM and a FM. The diet treatments consisted of 10036 control diet, 70% control diet plus 30% DFM-A, 70% control diet plus 30% DFM-B, 70% control diet plus 30% DFM-C, 100% control diet with FM and 70% control diet plus 3010´ DFM-B with FM.
The items investigated were body weight gain, feed intake, feed efficiency ratio (FER), various organ weights, protein efficiency ratio (PER), digestibility of nutrients, biological value, utilizability of protein and intestinal microbial changes of albino rats.
The results obtained are summarized as follows;
1. Although there was no statistical significance, rats fed diets containing DFMs and F`1 gained faster than the rats fed control diet. The best growth rate was obtained with the DFM-A and DFM-C groups.
In spite of the lower protein contents of the three DFM diets than the control diet, the growth rate of albino rats fed the DFM diets was somewhat improved than rats fed control diet.
2. No statistical significance was found in feed consumption but the trend was that the feed intake of control group was higher than those of the DFM diet group.
3. Feed efficiency was inproved significantly (p<0.01) by feeding DFMs as compared with control diet. DFM-A group showed the best FER, although no statistical significance was found.
4. Rats f the DFM diets showed significantly (p<0..01) higher, PER as compared with those of the control group. But no difference, was found among DFM groups. The significant improvement (p<0.01) of PER due also to the feeding of FM was seemed to be brought about by the beneficial effect of FM.
5. The present data revealed that feeding DFM and FM didn´t affect the weights of ´ various organs of rats.
6. The protein digestibility of experimental diets was similar to each other. Although no statistical significance was found among treatments, the DFMs and FM surely tended to improve the biological value and utilizability of protein.
7. Microbial study indicated that among intestinal flora FM fed group, there were more Lactic acid bacteria than E. coli.
From the experimental results described above, it may be concluded that the nutritive
g effects of three kinds of locally produced DFMs are much alike and the growth rate of growing albino rats can be improved by feeding either DF YI or FM due to their beneficial effects on the feed efficiency and protein utilization.
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