Application of calcium tannate in preparation of feed additive for animals
A feed additive, calcium tannin technology, applied in the direction of animal feed, application, additional food elements, etc., can solve the problems of animal feed intake, decreased feed utilization, poor palatability, etc., to achieve health care production performance, improve Effect, good palatability effect
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Embodiment 1
[0042] The preparation of embodiment 1 calcium tannate
[0043] A. the preparation of quinate gallotannate calcium:
[0044] Dissolve 50 g of pentagonal tannic acid in 500 mL of 75% ethanol aqueous solution by volume fraction, slowly add 20 mL of an aqueous solution containing 8.0 g of calcium chloride dropwise under stirring at room temperature, and stir to obtain a turbid reaction solution after completion of the dropping. Add 9.0 g of sodium carbonate to the obtained reaction solution, continue to stir and react uniformly for 5 hours, and the reaction solution gradually precipitates solids. The reaction solution was suction-filtered, the filter cake was washed with 75% ethanol aqueous solution (50mL×3), and vacuum-dried at 40° C. to obtain 28.5 g of calcium gallate tannate, which was named calcium gallate tannate A.
[0045] B. Preparation of chestnut calcium tannate:
[0046] Dissolve 50 g of chestnut tannic acid in 450 mL of 75% aqueous ethanol by volume fraction, and s...
Embodiment 2
[0053] The stability study of embodiment 2 calcium tannate
[0054] The experimental samples were the calcium tannate prepared in Example 1 and the corresponding tannic acid.
[0055] The calcium tannate prepared in Example 1 and the corresponding tannic acid were respectively placed in weighing bottles, placed at 60°C for 10 days, and samples were taken on the 0th day, the 5th day and the 10th day, according to the purity Analytical conditions were used to test the purity, and the results showed that the purity of various tannins changed greatly on the 5th day and the 10th day at a temperature of 60°C, while the purity of each calcium tannin remained stable (Table 1).
[0056] The high temperature stability research result of table 1 calcium tannate
[0057]
[0058]
Embodiment 3
[0059] Example 3: The application effect of calcium tannate in feed for weaned piglets.
[0060] The experimental sample used in this embodiment is the calcium tannate prepared in Example 1.
[0061] 140 28-day-old weaned pigs with an average body weight of 7.61kg and Du long-term hybrid lean piglets with similar body weight were divided into 7 groups as shown in Table 2, with 20 pigs in each group. Each group added the same dose of different calcium tannins to the conventional creep feed (without any drug feed additive, zinc oxide and high copper preparations), and then fed and drank freely. The diarrhea of the test pigs in each test group within 10 days was counted. rate, average daily gain (ADG), average daily feed intake (ADFI) and feed remuneration, and the control group is the test without any drug feed additives, zinc oxide, high copper preparations and calcium tannate in the conventional teaching materials Group. The results are shown in Table 2. As can be seen fro...
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