This experiment was to investigate ginger extract on production performance, antioxidant ability and immunity of laying hens. A total of 600 Hy-Line brown laying hens aged at 25 wk old were randomly divided into 2 treatments, 4 replicates per treatment, 75 layers each replicate. The control group hens were fed a basal diet; the experimental group hens were fed basal diets with 0.1% ginger extract. The results were shown as follows: 1) ginger extract significantly enhanced laying rates (P < 0.05) and daily egg weight (P < 0.05), substantially reduced the ratio of feed to egg (P < 0.05) of the hens; 2) ginger extract did not change the activities of glutathione peroxidase (GSH-PX) and total antioxidant capacity (TAOC) but significantly improved plasma superoxide dismutase (SOD) activity (P < 0.05), reduced malondialdehyde (MDA) content (P < 0.05) of the birds; 3) ginger extract did not affect the contents of serum total protein (TP), albumin (ALB), globulin (GLB), but significantly increased lysozyme (LZM) activity (P < 0.05); 4) ginger extract also significantly reduced plasma prostaglandin E2 (PGE2) content (P < 0.05). This study shows that ginger extract not only can improve the birds' antioxidant capacity, enhance immune function, but also has a potential of reducing inflammatory response.
The aim of this study was to investigate the influence of mineral sources on broiler breeders and their offsprings. Broiler breeding hens were fed with diets containing either organic or inorganic trace minerals at equal levels, i.e., (1) control group was fed with basal diet supplemented with inorganic trace minerals; (2) OZ group was fed with organic Zn instead of sulfate; and (3) OTM group was fed with organic Cu, Mn, Zn, and Se instead of inorganic sources. Results indicated that OTM supplementation decreased plasma cholesterol and triglyceride and increased yolk triglyceride via increasing high-density lipid protein cholesterol and decreasing low-density lipid protein cholesterol and very low-density lipid protein (VLDL) in plasma. OZ diets decreased plasma cholesterol and triglyceride mainly by reducing VLDL concentration. For control group, increased lipid concentrations resulted in increased lipid peroxidation in serum and malondialdehyde retention in yolk. Zn retention was not affected. Otherwise, OZ diet was observed to decrease Cu in yolk and albumen. While for OTM group, albumen Cu, albumen Se, and hepatic Se of hatched chicks were increased, but yolk Cu was decreased. Moreover, organic mineral supplementations improved broilers' growth performance. In conclusion, organic mineral supplementation in breeders' diets protected breeders from lipid peroxidation, increased egg nutrition retention, and benefit for growth of broilers.
Two-factor experiment was designed to examine from lipid metabolism, proinflammatory eicosanoids, and lipid peroxidation for investigating the effects of dietary oils and zinc levels of cardiovascular system of broilers. One hundred sixty 1-d-old male broilers were divided into 4 groups with 8 replicates of 5 birds fed one of the diets containing either corn oil or fish oil with one of 2 levels (75 mg/kg, 150 mg/kg) of zinc. Fish oil significantly decreased the levels of serum total cholesterol, triglyceride, high density lipoprotein-cholesterol, low density lipoproteincholesterol of broilers, decreased the contents of plasma prostaglandin E 2 , thromboxane B 2 , and phospholipase A 2 in broilers when compared with corn oil. Zn level did not alter lipid metabolism, but significantly affected eicosanoid synthesis and lipid peroxidation of broilers. Zinc at 150 mg/kg significantly decreased the contents of plasma prostaglandin E 2 , malondialdehyde, and phospholipase A 2 in broilers when compared to zinc at 75 mg/Kg. There were significant interactions between oil sources and zinc levels on production of serum triglyceride, high density lipoprotein-cholesterol, plasma 6-keto-prostaglandin F 1α , phospholipase A 2 and malondialdehyde. In conclusion, fish oil improved lipid profiles, reduced proinflammatory eicosanoid contents by inhibiting phospholipase A 2 production in broilers; while zinc reduced the contents of plasma malondialdehyde, phospholipase A 2 , and then decreased the concentration of prostaglandin E 2 of broilers.
Effects of maternal and posthatch dietary oils and vitamin E (VE) on antioxidant capability and muscle quality of the progeny broilers were studied. Two-factor experiment was designed, there were two main effects, one was oil source, the other was VE level, diets were as follows: corn oil (CO) +20 mg/Kg VE, fish oil (FO) +20 mg/Kg VE, CO+ 100 mg/Kg VE and FO+ 100 mg/Kg VE. The results showed that: (1) Higher level of VE in maternal and posthatch diets also significantly reduced drip loss of breast meat of the progeny broilers, but increased meat MDA significantly, decreased meat SOD activity significantly, besides, there was an interaction trend (P=0.06) between oil source and VE level on meat MDA, FO group with higher VE appeared the highest MDA content in breast meast. These findings suggest that diet with FO need more antioxidant to protect from oxidation, but FO oil with higher VE in maternal and posthatch diets may bring about meat deterioration to the progeny broilers.
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