不同蛋能比日粮对二元杂种猪的肥育与屠宰性能及肉品质的影响

Effect of diets on finishing and slaughter performances and meat quality trait of“L×L”crossbred pig

探讨不同日粮对大(约克)×长(白)二元杂种猪的肥育与屠宰性能以及肉品质的影响。结果表明:试期第2个月饲喂降低了日粮蛋能比的B组平均日采食量显著低于饲喂常规日粮的对照A组和饲用玉米酒糟代替常规日粮中部分玉米和豆粕的C组,3个组的平均日增重和料重比均无明显差异;3个组间的胴体斜长、背膘厚、眼肌面积和屠宰率均无显著差异;3个组间的剪切力、肉色、pH45min、pH24h和蒸煮损失也无明显差异,但C组眼肌的系水力显著低于A组。虽然B组的谷氨酸和胱氨酸含量显著低于A、C组,但3个组间的其他氨基酸含量没有明显差异,且3个组间的总氨基酸和总鲜味氨基酸也无显著差异;C组的肌苷酸含量明显低于A组和B组。3个组试猪眼肌的干物质和粗蛋白质含量均无显著差异,但B组和C组的肌内脂肪含量分别比A组显著提高45.6%和46.58%。

The purpose of this trial was to investigate the effect of different diets on finishing and slaughter performances and meat quality traits of “L （Large Yorkshire）×L（Landrace）” crossbred pig .Results showed that ：during the 2 months ,CP/ME ratio of group B was reduced ,the average daily feed intake （ADFI） of group B was significantly lower than those of group A （control group） and group C（DDGS instead of part of corn and soybean meal） ,but no difference was found in average daily gain （ADG） and gain feed ratio ;also no differences occurred in the carcass length ,back fat thickness ,longissisum muscle （LM ） area and dressing percentage;in addition ,no differences was found in the meat quality traits of shear force ,meat color , pH45 min ,pH24 h and cooking loss ,however ,the water‐holding capacity of meat from group C was significantly lower than that of group A .Although the contents of glutamic acid and cystine of group B was significantly lower than those of group A and group C ,no difference occurred in the contents of other amino acids ,the total amino acid and total flavor amino acid among the three groups .However ,the inosine monophosphate content of group C was lower than those of group A and B .Even though no difference was found in the contents of DM and CP in LM among the three groups of pigs ,the content of intramuscular fat （IMF） of group B and group C were increased by 45 .6% and 46 .58% ,respectirely .