Application of tannin micro-capsule in preparation of pig feed additive
A feed additive and tannin technology, which is applied in the application field of tannin microcapsules in the preparation of pig feed additives, can solve the problems of limited types of tannic acid products, no dosage form specifications, limited use methods, etc., and can change the palatability. Problems, few side effects, effect of promoting growth of pigs
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Embodiment 1 5
[0027] The preparation of embodiment 1 gallnut tannin gelatin microcapsule
[0028] At a temperature of 25°C, dissolve 10 g gallic tannin in a gelatin solution with a mass fraction of 4%, add 10% acetic acid solution to adjust the pH to 3.5-3.8, add 60% Na 2 SO 4 An appropriate amount of aqueous solution precipitates gelatin. Cool the reaction solution to 15°C, add an appropriate amount of 37% formaldehyde solution under stirring, then add 20% NaOH solution to adjust the pH to 7 to obtain Galla tannin gelatin solidified capsules, suction filter, and wash with water until formaldehyde-free to obtain Galla tannin gelatin Microcapsules. The content of Galla tannin in microcapsules is 27.4% by mass fraction.
Embodiment 2 5
[0029] The stability study of embodiment 2 Galla gall tannin gelatin microcapsules
[0030] Galla tannin gelatin microcapsules (prepared in Example 1) and galla tannin were placed in weighing bottles respectively, placed at 60°C for 10 days, and samples were taken on the 0th day, the 5th day and the 10th day, according to Purity analysis conditions were used to test the purity, and the results showed that the purity of Gallic tannin changed greatly on the 5th and 10th day at a temperature of 60°C, while the purity of Gallic tannin gelatin microcapsules remained stable (Table 1).
[0031] Table 1 Purity analysis of Galla tannin and its microcapsules after high temperature treatment
[0032] testing sample
Embodiment 3 5
[0033] Embodiment 3 Galla tannin gelatin microcapsules influence on pig feed palatability
[0034] 70 105-day-old healthy meat pigs with similar body weights were divided into 7 test groups as shown in Table 2, with 10 pigs in each group. Each group added Galla tannin in different forms and doses as shown in Table 2 to the basal feed, wherein the microcapsules represent Galla tannin gelatin microcapsules prepared in Example 1. All test pigs were fasted synchronously for 12 hours before the test. After 12 hours, the test pigs in each group were free to eat feed containing different doses of test samples, and observed for 30-60 minutes. When the test pigs no longer eat, the statistics of different test groups To evaluate the effect of adding different forms of gallic tannins to the feed on the feed intake of pigs. The simple feed without any form of Gallic tannin was used as the control group. The results showed that after adding different forms of gallic tannin in the feed, t...
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