动物营养学报2017，Vol.29Issue(8)：2769-2776,8.DOI:10.3969/j.issn.1006-267x.2017.08.020
低聚木糖对仔猪生长性能、肌肉组织营养成分 含量及肌纤维类型组成的影响
Effects of Xylooligosaccharide on Growth Performance, Muscle Nutrient Content and Muscle Fiber Type Composition of Piglets
摘要
Abstract
This experiment was conducted to study the effects of different xylooligosaccharide ( XOS) supple-mental levels on growth performance, longissimus dorsi muscle nutrient content and muscle fiber type composi-tion of piglets, in order to determine the optimal dose of XOS supplemental level and the possible regulatory mechanisms of XOS for muscle nutrient and muscle fiber type composition. A total of 120 healthy weaned Du-roc×Large White×Landrace piglets with 21 days of age were randomly assigned into 4 groups with 6 replicates per group and 5 piglets per replicate. Pigs in the control group were fed a basal diet and the others in the experi-mental groups ( groups Ⅰ, Ⅱ and Ⅲ) were fed the basal diets supplemented with 100, 250 and 500 mg/kg XOS, respectively. The experiment lasted for 56 days. When the experiment was over, one pig per replicate close to the average weight was chosen to slaughter sampling. The results showed as follows: 1 ) compared with the control group, average daily gain and average daily feed intake ( ADFI) of pigs in groupⅠwere sig-nificantly increased ( P<0.05) , and ADFI of pigs in groupsⅡ andⅢ was significantly increased ( P<0.05) , too. But there were no significant differences in the final weight and the ratio of feed to gain among all groups ( P>0.05) . 2) There were no significant differences in the contents of crude protein, ether extract, free amino acids such as leucine, glycine and aspartic acid among all groups (P>0.05), while the other amino acids in experimental groups rose or fell with different levels compared with the control group. 3) The myosin heavy chain ( MyHC) Ⅱa and MyHCⅡx mRNA relative expression levels in groupⅠwere significantly higher than those in the control group ( P<0.05) , and MyHC Ⅰ mRNA relative expression level in group Ⅱ was signifi-cantly increased compared with groupⅢ( P<0.05) . Compared with the control group, the mRNA relative ex-pression levels of AMP-activated protein kinase alpha, silent mating type information regulation 2 homolog 1 and uncoupling protein 3 were significantly increased (P<0.05), and there were no significant differences in the mRNA relative expression level of peroxisome proliferator-activated receptor-γ coactivator-1α among all groups ( P>0.05) . In conclusion, the suitable XOS supplementation in piglet diet can improve the growth per-formance and promote the mRNA relative expression levels of genes related to slow-twitch muscle fiber, and the recommend supplemental level is 100 to 250 mg/kg under the present experiment.关键词
低聚木糖/仔猪/生长性能/肌肉营养成分/肌纤维类型Key words
xylooligosaccharide/piglet/growth performance/muscle nutrient/muscle fiber type分类
农业科技引用本文复制引用
郭秋平,文超越,王文龙,段叶辉,李颖慧,孔祥峰,李凤娜..低聚木糖对仔猪生长性能、肌肉组织营养成分 含量及肌纤维类型组成的影响[J].动物营养学报,2017,29(8):2769-2776,8.基金项目
山东龙力企业合作项目 （）
湖南省自然科学基金面上项目(S2014J504I) （S2014J504I）
中国科学院青年创新促进会项目(2016326) （2016326）
