| 摘要: |
| 【目的】研究低蛋白饲粮下添加氨基酸对生长育肥猪生产性能、肉品质和抗氧化活性的影响。【方法】选取平均体质量（24.6±0.95） kg/头杜洛克×长白×大白杂交猪（杜长大杂交猪）63头，随机分3组，即对照组（基础饲粮）、低蛋白Ⅰ组(粗蛋白水平较对照低1%)和低蛋白Ⅱ组(粗蛋白水平较对照低2%)，每组3个重复，每个重复7头猪，试验期105 d，分为3个饲养阶段，第1阶段猪体质量为25~50 kg/头，第2阶段为50~75 kg/头，第3阶段为75~110 kg/头，研究低蛋白饲粮对保育-生长-育肥全期杜长大猪生长性能、肉品质、抗氧化能力和血液生化指标的影响。【结果】与对照组相比，2个低蛋白处理组的平均日采食量、平均日增质量、料重比均无显著差异（P>0.05）。各组间的肉质红度a*、黄度b*、亮度L和蒸煮损失无显著差异（P>0.05）；而低蛋白Ⅱ组滴水损失较对照组显著增加（P<0.05）。与对照组相比，低蛋白处理组超氧化物歧化酶（SOD）活性显著提高（P<0.05）。低蛋白Ⅱ组总抗氧化能力（T-AOC）较对照组显著提高，总胆固醇含量与低蛋白Ⅰ组相比显著升高（P<0.05），其他血液生化指标总蛋白、白蛋白、甘油三酯、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇和尿素氮含量与对照组和低蛋白Ⅰ组间均差异不显著（P>0.05）。【结论】在补充氨基酸的基础下饲喂低蛋白饲粮，对生长育肥猪的生长性能、肉品质、血液生化指标无显著负面影响，且可在一定程度上提高肌肉抗氧化能力。 |
| 关键词: 低蛋白饲粮 生猪饲养 生长性能 肉品质 血液生化指标 |
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| 基金项目:国家重点研发计划项目“地方猪精准营养与特色饲料资源开发与应用示范”(2018YFD0501202) |
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| Effects of low protein diets on growth performance,meat quality and antioxidant capacity of pigs |
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ZHANG Junjie,ZHU Jialiang,REN Liquan,et al
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| Abstract: |
| 【Objective】This study investigated the effects of low protein diet supplemented with amino acids on growth performance,meat quality and antioxidant capacity of pigs.【Method】A total of 63 Duroc×Landrace×Large White hybrid pigs with an average body weight of (24.6±0.95) kg were randomly divided into three groups of control (basic diet),low-protein group Ⅰ (crude protein level 1% lower than the control) and low-protein group Ⅱ (crude protein level 2% lower than the control).There were three replicates in each group,with 7 pigs in each replicate.The experimental period of 105 days were divided into three stages according to weight.The first stage was 25-50 kg/head,the second stage was 50-75 kg/head,and the third stage was 75-110 kg/head.The effects of low-protein diet on growth performance,meat quality,antioxidant capacity and blood biochemical indexes in hybrid pigs in the conservation growth fattening period was then investigated.【Result】There were no significant differences in average daily gain,average daily feed intake and F/G among the three groups (P>0.05).No significant differences in minolta color a*,color b*,color L* and cooking loss were observed among the three diets (P>0.05),while the drip loss was markedly increased in low protein diet Ⅱ compared with control group (P<0.05).The superoxide dismutase (SOD) activity in muscle of low protein Ⅰ and Ⅱ groups was significantly increased (P<0.05).Compared with control group,low protein diet Ⅱ increased the total antioxidant capacity (T AOC).Total cholesterol content in low protein group Ⅱ was significantly higher than that in low protein Ⅰ group (P<0.05),while there were no significant differences in other blood indexes TP,ALB,TG,HDL-C,LDL-C,BUN between three groups(P>0.05).【Conclusion】Low protein diets enhanced antioxidant capacity of pork without having negative effects on growth performance,meat quality and blood biochemical indexes in growing finishing pigs. |
| Key words: low-protein diet pig farming growth performance meat quality blood biochemical index |
