Effects of Moringa oleifera Leaf Extract Combined with Compound Probiotics on Performance, Egg Quality, Antioxidant Ability, Lipid Metabolism and Immune Function of Laying Ducks
RAO Tiyu1,2, WU Bomei1,2, XIAN Simei1,2, ZHANG You1,2, YANG Qian1,2, BAO Taotao1,2
1. College of Animal Science of Guizhou University, Guiyang 550025, China;
2. Institute of Animal Disease Research of Guizhou, Guiyang 550025, China
Abstract:The aim of this study was to investigate the effects of Moringa oleifera leaf extract combined with compound probiotics on performance, egg quality, antioxidant ability, lipid metabolism and immune function of laying ducks. A total of 500 twenty-five-week-old Jinding ducks were randomly divided into 5 groups with 5 replicates per group and 20 ducks per replicate. Ducks in the control group were fed a basal diet, and others in trial groups 1 to 4 were fed the basal diets supplemented with 1.5 g/kg complex probiotics, then supplemented with 0, 1.0, 1.5 and 2.0 g/kg Moringa oleifera leaf extract, respectively. The pre-experimental period lasted for 1 week, and the experimental period lasted for 8 weeks. The results showed as follows:1) compared with the control group, the average egg weight and feed to egg ratio of trial group 1 were significantly decreased (P<0.05). Compared with trial group 1, the laying rate of trial groups 3 and 4 were significantly decreased (P<0.05), the feed to egg ratio of trial groups 3 and 4 were significantly increased (P<0.05), and the average egg weight of trial group 4 was significantly increased (P<0.05). 2) Compared with the control group, the eggshell strength of trial groups 2, 3 and 4 was significantly increased (P<0.05), the yolk color of trial groups 2 and 3 was significantly increased (P<0.05), and the eggshell thickness of trial group 4 was significantly decreased (P<0.05). Compared with trial group 1, the eggshell strength of trial groups 2, 3 and 4 was significantly increased (P<0.05), and the yolk color of trial group 2 was significantly increased (P<0.05). 3) Compared with the control group, the serum and yolk malondialdehyde (MDA) content of all trial groups was significantly decreased (P<0.05), and the serum and yolk superoxide dismutase (SOD) activity was significantly increased (P<0.05); the serum glutathione peroxidase (GSH-Px) activity of all trial groups and yolk GSH-Px activity of trial groups 2, 3 and 4 was significantly increased (P<0.05). Compared with trial group 1, the serum and yolk SOD activity was significantly increased (P<0.05), the serum GSH-Px activity of trial group 3 was significantly increased (P<0.05), and the yolk GSH-Px activity of trial groups 2, 3 and 4 was significantly increased (P<0.05). 4) Compared with the control group, the contents of triglyceride (TG), total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) in serum and yolk of all trial groups were significantly decreased (P<0.05), and the high density lipoprotein cholesterol (HDL-C) was significantly increased (P<0.05). Compared with trial group 1, the serum TC content of trial group 3 was significantly decreased (P<0.05), the yolk TC content of trial groups 2, 3 and 4 was significantly decreased (P<0.05), the serum and yolk LDL-C content of trial group 3 was significantly decreased (P<0.05), and the serum HDL-C content of trial groups 2 the serum immunoglobulin G (IgG), immunoglobulin A (IgA), immunoglobulin M (IgM) contents and duodenal secretory immunoglobulin A (sIgA) content of all trial groups were significantly increased (P<0.05). Compared with trial group 1, the serum IgG content of trial group 2 was significantly increased (P<0.05), and the serum IgM content of trial group 3 was significantly increased (P<0.05). and 3 was significantly increased (P<0.05). 5) Compared with the control group, the serum immunoglobulin G (IgG), immunoglobulin A (IgA), immunoglobulin M (IgM) contents and duodenal secretory immunoglobulin A (sIgA) content of all trial groups were significantly increased (P<0.05). Compared with trial group 1, the serum IgG content of trial group 2 was significantly increased (P<0.05), and the serum IgM content of trial group 3 was significantly increased (P<0.05). In conclusion, use compound probiotics alone can significantly reduce the egg to egg ratio, enhance the antioxidant ability of laying ducks, improve lipid metabolism and increase the secretion of immunoglobulin; the combination of Moringa oleifera leaf extract and compound probiotics can significantly enhance eggshell strength, and the overall effect of enhancing the duck's antioxidant ability, improving lipid metabolism and increasing immunoglobulin secretion is better than using compound probiotics alone, the trial group 3 (1.5 g/kg compound probiotics and 1.5 g/kg Moringa oleifera leaf extract) has the better effects.
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