不同有机铬源对生长肥育猪生产性能和胴体品质的影响

Effects of Dietary Chromium Supplementation on Performance,Carcass Characteristics of Growing-finishing Swine

为研究不同有机铬源对生长肥育猪后期生产性能的影响，选用健康的杜×长×大三元杂交猪64头（体重约70奴），随机分入16个栏内，每栏4头，公母各半，4个处理分别为空白基础料组（不添加铬）、吡啶羧酸铬组（添加铬200μg·kg^-1）、蛋氨酸铬组（添加铬200μg·kg^-1）、甘氨酸铬组（添加铬200μg·kg^-1），试验期40d。试验结果表明，在生长肥育猪后期（70kg体重～屠宰），添加蛋氨酸铬使猪的平均日增重提高5．25％，猪胴体长增加1．75cm，眼肌面积增加4．2cm^2，添加有机铬能使猪胴体长和眼肌面积增加，血液中胰岛素含量略有增加，但差异不显著（P〉0．05）。

To assess the effects of dietary organic chromium picolinate in finishing pigs, sixty-four crossbred （Duroc x Landrace x Yorkshire, 70± 1 kg） finishing pigs were randomly and equally separated into four treatments based on their weight, hereditv basis and gender. Pigs in each treatment were respectively fed diets： a control diet with no added Cr, or 200 μg. k^g-1 of Cr from Cr picolinate（CrTP）. Cr glycine（CrGly）, Cr methionine（CrMet）. Four pigs were housed individually in pairs. Average duration of teeding before slaughter was 40 d. For the total experiment, comparing to pigs fed the unsupplemented Cr diet, the average daily gain of pigs fed CrMet had increased 5.25%; length of carcass increased 1.75 era; the area of longissimus dorsi increased 4.2 cm2 pigs fed the supplemented of organic Cr diet had increased the length of carcass and area of logissimus dorsi. The serum insulin concentrations were slightly increased by supplemented of organic Cr diet（P〉0.05）.