Recently, Russian scholar Sudavoff reported that the application of vitamin A, E and C combination preparations to the experimental test of the most suitable proportion and dosage of vitamin A, E, and C compound diets is quite practical. I will introduce: 2) 1250 strains of chicks were divided into 5 groups, 250 in each group. The first group was a control group. Each 1 kg of basal diet contained 10,000 IU of retinol, 20 mg of a tocopherol, and 25 mg of ascorbic acid. The second group added 0.5 million IU of vitamin A, 15 mg of vitamin E, and 50 mg of vitamin C per 1 kg of basal diet. The third group added vitamin AI to every 1 kg of basal diet. 50,000 IU, Vitamin E 15 mg and Vitamin C 50 mg. The fourth group added vitamin A 250,000 iU and vitamin E to every 1 kg of basal diet. sMg and Vitamin C 50 mg. The fifth group added 50,000 IU of vitamin A, 50 mg of vitamin E, and 50 mg of vitamin C per 1 kg of basal diet. 2 Test results At the beginning of the experiment, there was no essential difference in the phagocytic activity of bacteria within the chicks of each group. The phagocytic activity of white blood cells in serum of all chicks tested at 30 days of age was higher than that of chicks in the control group. The increase in this indicator was significant at 140 days of age. The chicks in the second group increased by 17.1% compared to the control chicks ( P<O.01), the chicks in group 3 increased by 8.60% (P<0.05) compared to the chicks in the control group. During the whole experimental period, the phagocytic index and phagocytic activity were not different in the other groups except that the second group chicks were different from the control chicks (P<0.05). The results of the study on body fluid factor protection showed that chicken serum bactericidal activity had no credibility difference among chicks in each group. However, with the increase of age, this indicator will change. For example, at the age of 140 days, the chicks of the second group and the third group were increased by 18.1% and 113.8% from the control group chicks, respectively (P< 0.01), while chicks in groups 4 and 5 increased by 4.7% and 3.8%, respectively. The serum lysozyme content of the test chicks also changed correspondingly. By the age of 140 days, the chicks of the 2nd and 3rd groups increased by 18.3% and 10.4% respectively compared with the chicks of the control group. The concentration of sialic acid increased when chicks of all levels were measured at 30 days of age, but there was no difference in plausibility, and by the end of the experiment, this indicator had declined again. The total serum protein levels of chicks in each group were at the same level at the beginning of the experiment, but the chicks were higher than the control chicks at 30 days of age, and still showed an increasing trend. Serum albumin levels were higher in chicks than in control chicks of the same age. The levels of transferrin, bound globulin, and a2-macroglobulin in the blood were higher in the test chicks than in the control chicks, but there was no plausibility difference. For immunoglobulin content, the chicks tested were higher than the control chicks throughout the study period. Among them, the second group of chicks was 14.6% higher (PX<0.01) than the control chicks, and the third group of chicks was 8.9% higher than the control group (P<0.03). 3 Conclusions Vitamin AO is added to the basal diet for every five kilogram chicks. The best ratio of 50,000V, vitamin E15mg and vitamin C50mg was markedly effective.
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