低聚木糖对生长肥育猪血浆生化参数和肌肉脂肪酸组成的影响

发布时间：2018-11-20 04:50

【摘要】：本试验旨在研究低聚木糖(XOS)对生长肥育猪血浆生化参数和肌肉脂肪酸组成的影响。选取70日龄、平均体重约为30kg的杜×长×大三元杂交猪110头,随机分为11组,每组10头(公母各占1/2),单栏饲养。试验设对照组(饲喂基础饲粮),抗生素组(饲喂在基础饲粮中添加0.04kg/t速大肥、0.2kg/t抗敌素的饲粮),30~65kg阶段100、250和500g/t XOS添加组(在30~65kg阶段分别饲喂在基础饲粮中添加100、250和500g/t XOS的饲粮,在66~100kg阶段均饲喂基础饲粮),66~100kg阶段100、250和500g/t XOS添加组(在30~65kg阶段均饲喂基础饲粮,在66~100kg阶段分别饲喂在基础饲粮中添加100、250和500g/t XOS的饲粮)以及30~100kg阶段100、250和500g/t XOS添加组(分别饲喂在基础饲粮中添加100、250和500g/t XOS的饲粮)。于试猪平均体重达100kg(约170日龄)时,前腔静脉采血,离心分离血浆,测定生化参数;屠宰后取背最长肌和股二头肌样品,测定其脂肪酸组成。结果表明:与对照组相比,30~65kg阶段,饲粮添加100或500g/t XOS可显著降低股二头肌中十七烷酸(C17∶0)含量(P0.05);66~100kg阶段,饲粮添加250g/t XOS可显著增加股二头肌中饱和脂肪酸(SFA)+单不饱和脂肪酸(MUFA)含量(P0.05),添加100或500g/t XOS可显著增加股二头肌中花生烯酸(C20∶1)含量(P0.05);30~100kg阶段,饲粮添加100g/t XOS可显著增加背最长肌中油酸/亚油酸以及股二头肌中C20∶1、MUFA和SFA+MUFA含量(P0.05),添加100或250g/t XOS可显著降低血浆总胆固醇浓度(P0.05),添加500g/t XOS可显著增加血浆高密度脂蛋白-胆固醇浓度(P0.05)。综上所述,饲粮添加一定剂量的XOS可通过调控与脂代谢相关的血浆生化参数、增加肌肉中MUFA和SFA+MUFA含量而改善猪肉的风味和营养价值,且以30~100kg阶段添加100g/t XOS为最佳。
[Abstract]:The aim of this study was to study the effects of xylose oligosaccharide (XOS) on plasma biochemical parameters and muscle fatty acid composition in growing and finishing pigs. A total of 110 DU 脳 Chang 脳 Da three-way crossbred pigs (70 days old with an average weight of about 30kg) were randomly divided into 11 groups, 10 in each group (male and female accounted for 1 / 2), and raised in a single farm. The experiment was divided into two groups: control group (fed with basic diet) and antibiotic group (fed diet fed with 0.04kg/t fast fertilizer and 0.2kg/t antitrichlorfon). 30~65kg stage 100250 and 500g/t XOS supplementation group (100250 and 500g/t XOS were fed in 30~65kg stage, and basic diet were fed in 66~100kg stage), 66~100kg 100250 and 500g/t XOS supplementation group (all fed basic diet in 30~65kg stage). The diets supplemented with 100250 and 500g/t XOS in the 66~100kg stage and 100250 and 500g/t XOS in the 30~100kg stage were fed with 100250 and 500g/t XOS in the basal diet, respectively. When the average weight of pig was about 170d, blood was collected from anterior vena cava, plasma was separated by centrifugation, biochemical parameters were measured, and fatty acid composition of longissimus dorsi and biceps femoris were taken after slaughtering. The results showed that in 30~65kg stage, dietary supplementation of 100 or 500g/t XOS significantly decreased the content of octadecanoic acid (C17: 0) in biceps femoris (P0.05). At the stage of 66~100kg, the content of (SFA) monounsaturated fatty acid (MUFA) in biceps femoris muscle was significantly increased by adding 250g/t XOS to diet (P0.05). Addition of 100 or 500g/t XOS significantly increased the content of arachidonic acid (C20: 1) in biceps femoris (P0.05). In the 30~100kg stage, the contents of oleic acid / linoleic acid in the longissimus dorsi muscle and the contents of C20: 1MFA and SFA MUFA in the biceps femoris muscle were significantly increased by adding 100g/t XOS to the diet (P0.05). Addition of 100 or 250g/t XOS significantly decreased plasma total cholesterol concentration (P0.05), and added 500g/t XOS significantly increased plasma HDL-cholesterol concentration (P0.05). In conclusion, a certain dose of XOS in diet could improve the flavor and nutritional value of pork by regulating plasma biochemical parameters related to lipid metabolism and increasing the content of MUFA and SFA MUFA in muscle, and 100g/t XOS was the best in 30~100kg stage.
【作者单位】：中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室;湖南农业大学动物科学技术学院;山东龙力生物科技股份有限公司;
【基金】：国家973计划课题(2012CB124704) 山东龙力生物科技股份有限公司合作项目中央驻湘科研机构技术创新发展专项(2013TF3006)
【分类号】：S828.5

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