摘要
This experiment was conducted to evaluate the effects of different selenium (Se) products (inorganic, organic A, organic B) added at two supplemental dietary Se levels (0.1 and 0.3 mg/kg) on growth performance, nutrient digestibility and Se retention in growing-finishing pigs. A factorial arrangement of treatments was used in a RCB design, with a non-Se-fortified basal diet serving as the negative control. A total of 56 crossbred pigs (28 male and 28 female pigs) initially weighing an average BW were allotted to each treatment with four pigs per pen on the basis of sex and weight. Two pigs per pen were selected and bled from the anterior vena cava at 3- weekly intervals to analyze Se concentration. In the growing phase (0-6 weeks), increased ADFI was observed when pigs were fed organic Se compared to those fed the control diet or inorganic Se treatment (p<0.05). Pigs fed inorganic Se had a great ADFI than pigs fed organic Se (p<0.05) in the late finishing phase (7-12 weeks), although there were no differences in whole period ADFI between organic or inorganic Se products. During 12 weeks of the whole experimental period, serum Se concentration increased linearly when dietary Se level increased regardless of Se products (p<0.05). Both dietary Se source (p<0.05) and Se level (p<0.01) influenced the Se concentration of various pig tissues at end of this experiment and Se content was the highest in the kidney. For the determination of nutrient digestibility, a metabolic trial was conducted in 3 replicates in randomized complete block (RCB) design. A total of 21 barrows ( of average BW) were used in the metabolic study. Selenium supplementation had no effect on nutrient digestibility except for crude protein. Crude protein digestibility increased with dietary supplementation of organic Se (A) compared with other forms of Se products or control diet (p<0.05). Consequently, this experiment indicated that dietary Se products and levels had no effect on growth performance of pigs. Se concentration in tissues and serum was increased in proportion to dietary Se level, especially when organic Se was provided. Although pigs were fed organic forms of Se, bioavailability of organic forms varied among products, consequently bioactivity of organic products to the animals should be evaluated before practical application in animal feed.
摘要译文
进行该实验以评估在两种补充膳食Se水平（0.1和0）下添加的不同硒（Se）产物（无机，有机A，有机B）的效果。3 mg / kg）对生长肥育猪的生长性能，营养物质消化率和硒含量的影响。在RCB设计中使用因子排列处理，用非Se强化的基础饮食作为阴性对照。根据性别和体重，每只处理分配共56只杂交猪（28头雄性和28头雌性猪）最初称重平均体重，每只处理4只猪。选择每只猪两只猪，每隔3周从前腔静脉放血以分析Se浓度。在成长阶段（0-6周），与饲喂对照饮食或无机Se处理的猪相比，当饲喂有机硒时，观察到ADFI增加（p 0.05）。饲喂无机硒的猪在饲养后期（7-12周）饲喂有机硒的猪的ADFI很高（p 0.05），虽然有机或无机硒产品之间的整个期间ADFI没有差异。在整个实验期间的12周内，无论Se产品如何，当饮食中Se含量增加时，血清Se浓度呈线性增加（p 0.05）。饮食中的Se源（p 0.05）和Se水平（p 0。01）在本实验结束时影响各种猪组织的Se浓度，并且Se含量在肾中最高。用于测定营养物质的消化率，在随机完全区组（RCB）设计中以3个重复进行代谢试验。在代谢研究中使用总共21个阉猪（平均BW）。除粗蛋白外，补充硒对营养物质的消化率没有影响。与其他形式的硒产品或对照饮食相比，膳食补充有机硒（A）后粗蛋白消化率增加（p 0.05）。所以，该实验表明，日粮中的硒产品和水平对猪的生长性能没有影响。组织和血清中的硒浓度与膳食硒水平成比例增加，特别是当提供有机硒时。尽管猪饲喂有机形式的硒，但有机形式的生物利用度因产品而异，因此，在动物饲料中实际应用之前，应评估有机产品对动物的生物活性。
Tian, J.Z.; Yun, M.S.; Kong, C.S.; Piao, L.G.; Long, H.F.; Kim, J.H.; Lee, J.H.; Lim, J.S.; Kim, C.H.; Kim, Y.Y.; Han, In K.;. Effects of Different Products and Levels of Selenium on Growth, Nutrient Digestibility and Selenium Retention of Growing-finishing Pigs[J]. Asian-Australasian Journal of Animal Sciences, 2006,19(1): 61-66