饲粮中高铜停用的时间及停用后添加VE对猪生长性能和猪肉品质的影响

试验采用 2× 3因子设计 ,研究在 2 0～ 10 0kg生长肥育猪饲粮中停用高铜的 3种不同时间 (分别于试猪体重达到 2 0kg、6 0kg和 80kg时停止饲喂 2 5 0mg/kg的高剂量铜 )及停用高铜后添加VE(2 0 0mg/kg)对猪生长性能和猪肉品质的影响。试验共 6个处理 ,每个处理 3次重复 ,每次重复 3头试猪。 5 4头体重为 2 0kg左右的约克猪按体重大小被随机分配到各处理组。结果表明 ,饲粮处理对试猪全期生长性能和屠宰性能无明显影响 (P >0 0 5 ) ,但停铜后添加VE有改进饲料利用率的趋势 ,明显提高肌肉铁和VE含量。停用高铜对肉质无明显影响 (P >0 0 5 ) ,但停铜后添加VE可明显降低 4℃贮存猪肉的TBA值 (P <0 0 1) ,趋于降低滴水损失 (P >0 0 5 ) ,显著提高肉色评分(P <0 0 5 )。添加VE越早 ,上述改进的幅度就越大。由此结论 ,高铜的使用时间对猪肉品质无明显不良影响 ,提早添加VE可改进肉质

Growth Performance and Meat Quality of Pigs Fed Diets Supplemented with or without 250 mg/kg Copper and 200 mg/kg Vitamin E at different times

A 2×3 factorial trial was used in the experiment to study the effects of the removal time of high level copper (250?mg/kg) from diets, together with or without VE supplementation on the performance and meat quality. High level copper was removed from the beginning of the trial ( i.g.20?kg of body weight) or not removed until pigs reached 60?kg or 80?kg. After copper removal, either 0 or 200?mg/kg VE was added in the diet. Fifty four Yorkshine pigs with average body weight of 20?kg were allotted into the 6 treatments of 3 replicates with 3 pigs per replicate. The results showed that growth performance and carcass characteristics were not significantly influenced by the dietary treatments (P>0 05). VE supplementation after copper removal improved feed efficiency (P>0 05) and increased the content of iron and VE in the meat. Either supplementation or removal of 250?mg/kg copper didn't influence meat quality. The supplementation of 200?mg/kg VE after copper removal reduced TBA value (P<0 01) and drip loss(P>0 05), improved color scores (P<0 01) of the pork chops stored at 4?℃ up to 9 days. The earlier the VE supplementation, the higher the improvement. It is concluded that supplementation of 250?mg copper /kg diet has no obvious negative influence on meat quality and VE supplementation at early stage improves meat quality.