Kyoung Hyunjin, Kang Yonggu, Ahn Jinmu, Cho Jin Ho, Seo Dongoh, Nam Jinuk, Shin Ikcheol, Kim Hyeun Bum, Song Minho
Department of Animal Sicence and Biotechnology, Chungnam National University, Daejeon 34134, Korea.
Department of Animal Science, Chungbuk National University, Cheongju 28644, Korea.
J Anim Sci Technol. 2025 May;67(3):607-618. doi: 10.5187/jast.2024.e53. Epub 2025 May 31.
Selenium (Se) is an essential trace mineral that plays an important role in physiological and biochemical responses by regulating the antioxidant system. Dietary Se is provided as a nutritional supplement to livestock diets in inorganic (ISe) or organic (OSe) form and has different bioavailability to animals. However, the comparison of the effects of dietary Se in different forms and levels of bioavailability are still limited. Therefore, this study was conducted to evaluate the effects of dietary Se sources and levels on growth performance, carcass characteristics, proximate composition of pork loin, Se concentrations, and blood biochemistry of growing-finishing pigs. In a randomized complete block design (block = initial body weight and sex), 160 pigs (28.17 ± 3.03 kg of body weight) were allotted to five dietary treatments (4 pigs/pen; 8 replicates/treatment) and fed for 14 weeks. Dietary treatments were 1) a non-Se-fortified diet based on corn and soybean meal provided as control (CON), 2) CON + 0.3 ppm ISe (ISe3), 3) CON + 0.5 ppm ISe (ISe5), 4) CON + 0.3 ppm OSe (OSe3), and 5) CON + 0.5 ppm OSe (OSe5). Data and sample collections were conducted at the specific time points during the study. Pigs fed dietary OSe tended to have an increased (p < 0.10) gain to feed ratio in the grower phase compared with those fed dietary ISe. In addition, dietary OSe increased (p < 0.05) hot carcass weight compared with dietary ISe. In contrast, dietary ISe increased (p < 0.05) crude protein content of pork loin compared with dietary OSe. Se concentrations in the kidney and pork loin were higher when the dietary Se source was OSe (p < 0.05) and increased with increasing dietary Se level (p < 0.05). In the finisher phase, serum total protein, calcium, inorganic phosphorus, magnesium, and creatinine concentrations increased with increasing dietary Se level (p < 0.05). In conclusion, our study verified that dietary ISe and OSe each affected crude protein content of pork loin and tissue Se concentrations, respectively. Furthermore, blood biochemistry was modulated by prolonged intake with increased levels of dietary Se, regardless of the Se source.
硒（Se）是一种必需的微量矿物质，通过调节抗氧化系统在生理和生化反应中发挥重要作用。日粮中的硒以无机（ISe）或有机（OSe）形式作为营养补充剂提供给家畜日粮，对动物具有不同的生物利用率。然而，不同形式和生物利用率水平的日粮硒的效果比较仍然有限。因此，本研究旨在评估日粮硒来源和水平对生长育肥猪生长性能、胴体特性、猪里脊肉的近似成分、硒浓度和血液生化指标的影响。采用随机完全区组设计（区组=初始体重和性别），将160头猪（体重28.17±3.03 kg）分配到五种日粮处理中（每栏4头猪；每个处理8个重复），并饲养14周。日粮处理分别为：1）以玉米和豆粕为基础的无硒强化日粮作为对照（CON），2）CON+0.3 ppm无机硒（ISe3），3）CON+0.5 ppm无机硒（ISe5），4）CON+0.3 ppm有机硒（OSe3），5）CON+0.5 ppm有机硒（OSe5）。在研究期间的特定时间点进行数据和样本采集。与饲喂无机硒日粮的猪相比，饲喂有机硒日粮的猪在生长育肥前期的料重比有增加趋势（p<0.10）。此外，与无机硒日粮相比，有机硒日粮增加了（p<0.05）热胴体重。相反，与有机硒日粮相比，无机硒日粮增加了（p<0.05）猪里脊肉的粗蛋白含量。当日粮硒来源为有机硒时，肾脏和猪里脊肉中的硒浓度较高（p<0.05），且随日粮硒水平的增加而增加（p<0.05）。在育肥后期，血清总蛋白、钙、无机磷、镁和肌酐浓度随日粮硒水平的增加而增加（p<0.05）。总之，我们的研究证实，日粮中的无机硒和有机硒分别影响猪里脊肉的粗蛋白含量和组织硒浓度。此外，无论硒来源如何，长期摄入增加水平的日粮硒都会调节血液生化指标。
