动物营养学报2016，Vol.28Issue(8)：2367-2377,11.DOI:10.3969/j.issn.1006-267x.2016.08.007
微量元素添加模式对肉鸡生长性能、微量元素代谢和血浆抗氧化性能的影响
Effects of Supplemental Patterns of Trace Minerals on Growth Performance, Trace Mineral Metabolism and Plasma Antioxidant Ability in Broilers
摘要
Abstract
This experiment was conducted to determine the effects of different supplemental patterns of trace minerals on growth performance, trace mineral metabolism and plasma antioxidant ability in broilers. A total of 720 one⁃day⁃old Cobb 500 broilers were randomly assigned to 4 groups, each group contained 10 replicates with 18 broilers per replicate. Industrial standard group: dietary copper ( Cu) , ferrum ( Fe) , zinc ( Zn) and manganese ( Mn) were added according to agriculture industrial standards NY/T 33—2004. NRC standard group: dietary Cu, Fe, Zn and Mn were added following NRC ( 1994 ) recommendation. NRC proportion group: after measurement of mineral content in basal diet, the highest multiple of Cu in basal diet to NRC rec⁃ommendation was found, and then the rest of minerals were supplemented to reach same multiple. Relative bio⁃availability group: bioavailability of minerals in feed ingredients was assumed 30% relative to sulfates, and then practical contents were transformed into valid content of equivalent sulfate. Finally, adding sulfates as NRC proportion group. Trace minerals were provided as inorganic sulfates. The experiment lasted for 42 days. The results showed as follows: 1 ) different supplemental patterns of trace minerals did not cause significant differences on growth performance and mortality rate of broilers ( P>0.05) . 2) At 21 days of age, the relative mRNA expression of copper transporter 1 ( Ctr1) in duodenum of broilers in NRC proportion group was signif⁃icantly higher than that in other groups ( P<0.05); the relative mRNA expression of divalent metal ion trans⁃porter 1 ( DMT1) in duodenum of broilers in NRC proportion group and relative bioavailability group was sig⁃nificantly higher than that in other groups (P<0.05). At 42 days of age, the relative mRNA expression of DMT1 in duodenum of broilers in NRC standard group and relative bioavailability group was significantly high⁃er than that in other groups ( P<0.05) . There were no significant differences on the relative mRNA expression of zinc transporter 1 ( ZnT1) and zinc transporter 5 ( ZnT5) among all groups at 21 and 42 days of age ( P>0.05) . 3) The plasma total antioxidant capacity ( T⁃AOC) of broilers in NRC proportion group and relative bioavailability group was significantly higher than that in other groups at 21 day of age (P<0.05), while the plasma catalase ( CAT) activity of broiler in NRC proportion was significantly lower than that in telative bio⁃availability group at 42 day of age ( P<0.05) . 4) Positive correlation between fecal trace minerals concentra⁃tion and dietary supplemental concentration of trace minerals was observed ( P<0.05) . In conclusion, from the perspective of absorption efficiency and plasma antioxidant ability, programme considering relative bioavail⁃ability of trace minerals in basal diet is optimum, meanwhile, it reduce mineral excretion.关键词
微量元素/生长性能/抗氧化/微量元素代谢/肉鸡Key words
trace mineral/growth performance/antioxidant/mineral metabolism/broilers分类
农业科技引用本文复制引用
濮振宇,辛洪亮,余超,王砀砀,雷新宇,姚军虎,杨小军..微量元素添加模式对肉鸡生长性能、微量元素代谢和血浆抗氧化性能的影响[J].动物营养学报,2016,28(8):2367-2377,11.基金项目
陕西省科技统筹创新工程计划项目 （）
