The Effect Of Probiotics And Enzyme Preparation On The Force-feeding Of Fatty Liver Geese

In order to reduce the cost of feed, increase the yield of goose liver and bring greater profits for the industry of goose live, we study the applicable effects of amylase, xylanase, probiotics on the production of goose liver, and their effects on improving the goose'absorption and utilization of maize. In this study, after pre-feeding 68 landes were force-fed feeds added with amylase, xylanase and probiotics, the 68 landes were divided into 9 groups (free choice feeding group as the control group 1, force-feeding groups as the control group 2, experimental group 3,4, 5,6,7,8 and 9). The experimental diets were composed of basic diet (corn and goose oil) and three kinds of additives and their different combinations,2%o xylanase (experimental group 3),4%o probiotics (experimental group 4),2%o amylase (experimental group 5),2%o amylase+4%o probiotics (experimental group 6),2%o amylase+2%o xylanase (experimental group 7),2%o xylanase+4%o probiotics (experimental group 8),2%o xylanase+2%o amylase+4%o probiotics (experimental group 9). Our study explored different combinations of the three kinds of additives and their effects on the production performance of the landes, liver production performance, body fat deposition, visceral organs and blood biochemical indexes. The results showed that:1. Growth performance:After force-feeding, the body weight and body weight gain of, landes have been greatly improved, the differences among the force-feeding groups were significant (p<0.05). In all the groups, the body weight gain of landes in group 7(added with 2%o amylase and 2%o xylanase) were the highest and the ratio of weight gain and consuming-feed was the lowest. There were no significant differences among the force-feeding groups in body weight gain, but the difference between free choice feeding group and force-feeding groups was extremely significant(p<0.001). During the period of force-feeding, the body weight gain of free choice feeding group was only 0.146kg, but those of the force feeding groups reached to 2.825-3.333 kg.2. Fatty liver performance:The livers'weight of experimental group 3,4,5,6, 7,8 and 9 were higher than that of control group 2, and the fatty liver of group 7 was the highest, the fatty liver of group 4 was a little lighter than group 7. The weight of fatty liver and the ratio of fatty liver and carcass among the force feeding groups had no significant differences.3. Body fat deposition:Between the force feeding groups arid free choice feeding group, there were significant differences in the thickness of subcutaneous fat, the weight of abdominal fat, the weight of intestinal fat, the sum of intestinal fat and abdominal fat, abdominal fat ratio, and intestinal fat ratio (p<0.05). The differences among the force feeding groups in the thickness of subcutaneous fat, the weight of intestinal fat, the sum of intestinal fat were not significant, but in the weight of abdominal fat, the sum of intestinal fat and abdominal fat, there were significantly different (p<0.05), group 6 was the highest and group 2 was the lowest.4. Internal organs:There were no significant differences in the length of cecum, the weight of spleen among the experimental groups. However, the landes'intestinal diameter, the total intestinal length and the weight of pancreas were significantly higher than the control group, however weight of bursa were markedly lower than free choice feeding group.5. Blood biochemical parameters:in addition to total protein, the blood biochemical parameters (high-density lipoprotein, low-density lipoprotein cholesterol, aspartate, alanine, total cholesterol,triglycerides, glucose) of force feeding groups had significant difference with those of free choice feeding group (p<0.05), some of which had reached a very significant level (p<0.001). In addition, the blood biochemical parameters among the 8 force feeding groups had some differences:the landes'blood AST level in groups 5 was significantly higher than that of group 4,6 groups,8 groups,9 group, and had an extreme significant difference with that of group 6 and group 8(p<0.001); the alanine content in landes'blood of group 4 had no significant differences with that of other force feeding groups, but it had an extreme significant difference with that of group 6 (p<0.001); the high-density lipoprotein content in landes'blood of group 4 had no significant differences with that of other force feeding groups, but it had significant differences with that of group 2 and group 4(p<0.05); there were no significant differences on the total protein, low-density lipoprotein, total cholesterol, triglyceride and glucose among the force feeding groups.To sum up, adding 2%oamylase,2%oxylanase,4%o probiotics into the feed and their compound can improve the weight of landes'fatty liver, and they also have effects on landes'growth performance, body fat deposition, internal organs and blood biochemical parameters. Overall, adding 2%oamylase+2%oxylanase into the feed had the best applicable effects, and adding 4%oprobiotics take the second place.