育肥猪出栏前去掉预混料对猪胴体与肉品质的影响

Effect of Removing Premix from Diet on Carcass Traits and Meat Quality in Late-stage Finishing Pigs

为探讨育肥猪出栏前不同时间去掉预混料对胴体和肉品质的影响,选用180头体重为80 kg左右的杜长大三元杂交育肥猪,随机分成3组(对照组、试验1组、试验2组),每组3个重复(圈),每重复(圈)20头。对照组饲喂含有4%商业预混料的日粮,试验1组宰前2周饲粮中去掉预混料(用沸石粉代替预混料),试验2组宰前4周饲粮中去掉预混料(用沸石粉代替预混料)。屠宰后测定并比较各组猪只的胴体品质和肉品质指标。结果表明:宰前不同时间去掉预混料对猪胴体品质、肉品质均无显著影响(P>0.05)。研究结果为减少生猪养殖过程中的粪污排放对环境的污染以及降低生产成本提供了有益参考。

The present study was designed to evaluate the influence of removing premix from diet on carcass traits and meat quality in finishing pigs during late fattening period.A total of 180 Duroc×Landrace×Yorkshire(DLY)hydride pigs with body weight of approximate 80 kg were randomly assigned to one of three groups such that control group(n=60)fed the basal diet containing 4%of commercial premix,experimental group 1(n=60)whose premix was removed(replacing with zeolite powder)from the basal diet two weeks prior to slaughtering,experimental group 2(n=60)whose premix was removed(replacing with zeolite powder)from the basal diet four weeks prior to slaughtering.The parameters associated carcass traits and meat quality of the slaughtered finishing pig were determined and statistically assessed.The results showed that removing premix from diet during late fattening period(two and four weeks prior to slaughtering)had no significant effect on carcass traits and meat quality in finishing pigs(P>0.05).Our study provides references for reducing the environmental contamination caused by excrements emission from swine production and decreasing the feeding cost of finishing pigs.