N-甲基D,L-天冬氨酸对肥育猪生长性能和胴体品质的影响

Effect of N-methyl-D,L-aspartate on Growth Performance and Carcass Characteristics in Finishing Swine

本试验以杜长大肥育猪为试验对象 ,研究了N 甲基D ,L 天冬氨酸对其生长性能和胴体品质的影响。结果表明 ,在日粮中添加 50mg/kgN 甲基D ,L 天冬氨酸使肥育猪 ( 1 )日增重提高 9.31 % (P <0 .0 1 ) ,饲料转化率提高 7.1 6 % (P <0 .0 2 ) ;( 2 )胴体瘦肉率提高 6 .53% (P <0 .0 1 ) ,脂肪比率降低 1 1 .76 %(P <0 .0 1 ) ,背膘厚降低 1 9.72 % (P <0 .0 1 ) ,眼肌面积提高 2 1 .0 1 % (P <0 .0 4 ) ;( 3)背最长肌、股二头肌和半膜肌重量分别增加 1 1 .3% (P <0 .0 1 )、1 0 .0 9% (P <0 .0 1 )和 1 4 .4 4% (P <0 .0 1 )。

Eighty four finishing pigs(Duroc*Landrace*Yorkshire)were used to study the effect of NMA on growth performance and carcass characteristics for a period of 44 days. The pigs were allotted to two groups by weight and sex, which received the same corn soybean based diet but supplemented with 0 (control group) and 50mg/kg NMA (test group).The results of feeding trial showed that adding NMA improved average daily gain by 9.31%(P<0.01) and feed efficiency by 7.16%(P<0.01). The carcass characteristics was apparently improved by adding 50mg/kg NMA. Percentage of dissected lean of carcass was increased by 6.53%(P<0.01),percentage of dissected fat of carcass decreased by 11.7%(P<0.01);the thickness of backfat decreased by 19.72%(P<0.01).Weight of biceps femoris,semimembranosus and longissiums dorsi muscle were increased by 10.09%(P<0.01),14.44%(P<0.01)and 11.39%(P<0.04) respectively.