几种常用饲料添加剂对育成猪生长性能、血液生化指标及经济效益的影响
[Abstract]:The effects of sodium butyrate, zinc oxide, Bacillus subtilis and Clostridium butyrate on the growth, digestibility and blood composition of pigs were studied. In order to reduce the feed cost and reduce the production cost of pig farm, the effect of immune function and economic benefit were analyzed, and some feed additives were correctly recognized and used. 80 three-way crossbred pigs ([Yorkshire 脳 Landrace] 脳 Duroc) with initial weight 37.50 卤1.477kg were selected and randomly divided into five treatment groups (control (CON) group, encapsulated sodium butyrate (CSB) group) with random complete block design according to their body weight and sex. Zinc oxide coated (ZnO) group, Bacillus subtilis (H10) group, Bacillus subtilis and Clostridium butyrate (F10) group were fed for 6 weeks according to the standard of NRC (1998). The indexes of production performance, digestibility, blood biochemistry and economic benefit were measured during the trial period. The results are as follows: (1) growth performance: the daily gain of (ZnO), Bacillus subtilis and Clostridium butyrate mixed preparation group (F10) in sodium butyrate group was 9.47% and 8.71% higher than that in control group, respectively. The difference was not significant (P0.05). In the control group (P0.05), CSB group and F10 group, (2) the digestibility of N intake in group F10 was 7.433.63% higher than that of control group and CSB group, and the nitrogen deposition and digestibility were 16.19% higher than that of control group. (2) the ratio of feed to weight of Bacillus subtilis group (H10) to F10 group (0.05P0.10). F10 group had the best promoting effect on growth performance. (2) the digestibility of N uptake in group F10 was 7.433.63% higher than that of control group and CSB group respectively. And 17.45% lower than CSB group 5.28% and 13.04%; Nitrogen deposition and digestibility in CSB group were 10.06% and 2.16% higher than those in control group, and there was no significant difference between each test group and control group and between test group and control group (P0.05). There was significant difference in serum cortisol content between control group and control group (P0.05). Serum cortisol in group F 10 was significantly higher than that in group CSB (P 0.05). The levels of serum urea nitrogen in each group were significantly lower than those in control group and control group (0.05P0.10). The serum glucose content in the control group was significantly lower than that in the ZnO group (P0.05), the serum glucose content in the F10 group was significantly lower than that in the ZnO group (P0.05), and the level of serum IGF-1 in the F10 group was significantly lower than that in the H10 group (P0.01). There was a significant trend (0.05P0.10) in the serum IGF-1 content between the CZnO group and the control group. Although the content of IGF-1 in other groups was higher than that of the control group, there was no significant difference between the other groups and the control group and each test group (P0.05). (4). The content of serum IgG in the H10 group was significantly higher than that in the control group (P0.05) and the difference between the two groups was significant (P0.05). There was no significant difference in serum IgA content among groups (P0.05). Four kinds of additives had significant promoting effect on immune performance of adult pigs. (5) Economic benefit: the feed cost of CSB group was significantly higher than that of H10 group (P0.05), and the feed cost per unit weight gain was significantly higher in CSB group than in H10 group (P0.05), and F10 group had the best immune effect. (5) Economic benefit: the feed cost of CSB group was significantly higher than that of H10 group (P0.05). The cost of weight gain in the control group and CSB group was significantly higher than that in the H10 group (P0.05). The unit weight gain cost of control group and CSB group were significantly higher than that of F10 group (P0.01), CZnO group was significantly higher than F10 group (P0.05). The results showed that adding Bacillus subtilis and Clostridium butyrate to the diet of adult pigs could improve their growth performance, improve their immune performance, reduce the feed cost, and effectively reduce the production cost of pig farms. The other three additives have no significant effect on breeding pigs and can not be added in the diets of adult pigs in order to reduce the feed cost and thus reduce the production cost of pig farms.
【学位授予单位】:延边大学
【学位级别】:硕士
【学位授予年份】:2016
【分类号】:S828.5
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