本研究旨在比较不同的日粮硒(Se)来源(0.5mg/kg)对生产性能的影响。肉质,肉仔鸡的抗氧化能力以及血液和组织中必需的微量元素浓度。将360只1日龄雄性黄羽鸡(37.00±0.17g)随机分为5种饮食处理:基础饮食(CON)和4种补充亚硒酸钠(SS)的饮食,硒代蛋氨酸(SM),富硒酵母(SY),和纳米硒(NS)56d,分别,每个处理6个重复和每个重复12只鸡。饲粮添加硒对肉鸡生长性能和胴体性状无影响(P>0.05)。与CON和NS相比,补充SM增强了胸肌的发红(P<0.05)。补充SY和NS提高了硒的浓度,铜,锰,血清中锌(P<0.05)。补充SS也提高了血清中的锌含量(P<0.05)。饲喂SY日粮的肉鸡与饲喂CON的肉鸡相比,肝脏和胸肌中的硒含量增加,SM,和NS日粮(P<0.05)。此外,与SS相比,SY提高了胸肌Se浓度(P<0.05)。此外,日粮添加硒可显著提高大腿肌肉中硒的含量(P<0.05),SY显示最高的Se沉积。饮食补充SS,SM,和NS提高了血清中总超氧化物歧化酶活性和总抗氧化能力(T-AOC)(P<0.05)。补充SY也升高了血清中的T-AOC(P<0.05)。此外,SS和SM可增强肝脏T-AOC(P<0.05)。总之,补充SM影响肉的颜色。添加各种硒源的日粮可提高肉仔鸡大腿肌肉的抗氧化能力和硒含量,SY显示出更明显的沉积效率。此外,添加不同硒源的日粮对肉鸡血清和组织中必需微量元素的浓度有不同的影响。
This study aimed to compare the effects of various dietary selenium (Se) sources (0.5 mg/kg) on performance, meat quality, and antioxidant capacity in broilers as well as essential trace elements concentrations in their blood and tissues. A total of 360 one-day-old male yellow-feathered chickens (37.00 ± 0.17 g) were randomly allocated to 5 diet treatments: the basal diet (CON) and 4 diets supplemented with sodium selenite (SS),
selenomethionine (SM), selenium-enriched yeast (SY), and nano-selenium (NS) for 56 d, respectively, with 6 replicates per treatment and 12 chickens per replicate. Dietary Se supplementation did not affect growth performance and carcass characteristics in broilers (P > 0.05). Supplemental SM enhanced the redness in the pectoral muscle compared to CON and NS (P < 0.05). Supplementation of SY and NS improved the concentrations of Se, copper, manganese, and zinc in the serum (P < 0.05). Supplemental SS also elevated the zinc content in the serum (P < 0.05). Broilers fed the SY diet showed increased Se content in the liver and pectoral muscle compared to those fed CON, SM, and NS diets (P < 0.05). Also, SY improved the pectoral muscle Se concentration compared to SS (P < 0.05). Besides, dietary Se supplementation increased the Se content in the thigh muscle (P < 0.05), with SY showing highest Se deposition. Dietary supplementation with SS, SM, and NS improved the activities of total superoxide dismutase and total antioxidant capacity (T-AOC) in the serum (P < 0.05). Supplemental SY also elevated the T-AOC in the serum (P < 0.05). Additionally, SS and SM enhanced the T-AOC in the liver (P < 0.05). In conclusion, supplemental SM affected meat color. Supplementing diets with various Se sources increased antioxidant capacity and Se content in the thigh muscle of broilers, with SY showing a more pronounced deposition efficiency. Besides, diets supplemented with different Se sources had variable effects on the concentrations of essential trace elements in the serum and tissues of broilers.