饲料中加镉对猪生长性能及内脏器官的影响

Effects of Dietary Cadmium on Growth Performance and Relative Weight of Organs in Growing Pigs

体重27kg左右杜长大生长猪96头,随机分为2组,每组设3个重复,分别饲喂添加0、10. 0mg/kg镉的玉米豆粕型饲粮,在体重约90kg时结束饲养试验,并对猪的生长性能、内脏器官的相对重量、血清相关激素指标进行分析。结果显示,添加10. 0mg/kg镉可显著影响猪的生长性能及内分泌水平,试验猪日增重降低18. 6% (P<0. 05),料重比升高15. 1% (P<0. 05);血清生长激素水平降低36. 5% (P<0. 05),而对T3、T4 水平无显著影响(P>0. 05);使肝重率、脾重率、胸腺重率、肠系膜淋巴结重率分别提高15. 1% (P<0. 05)、19.7% (P<0. 05)、30. 7% (P<0. 05)、33. 3% (P<0. 05),而对肾、心、胰、胆囊的相对重量无显著影响(P>0.05)。提示较低剂量镉(10. 0mg/kg)能影响猪的生长性能并可能由镉致生长激素水平降低所致。

Ninety-six pigs (Duroc×Landrace×Yorkshine) were fed a corn-soybean basal diet (control) or a diet containing 10mg/kg cadmium (Cadmium-treated). Pigs (initially 27kg) were randomLy allocated to one of two dietary treatments with three replicates to determine the effect of cadmium on growth performance, relative endocrine system and relative weight of organs until the pigs reach 90kg weight. The study result show that 10.0mg/kg cadmium decreases porcine growth and affects growth hormone in serum. Average daily gain is decreased by 18.6% (P<0.05) and feed gain ratio is decreased by 15.1%(P<0.05); serum growth hormone level is depressed by 36.5%(P<0.05); T 3 and T 4 contents are not affected by cadmium (P>0.05); relative weights of liver, spleen, lymphaden and thymus are increased by 15.1%(P<0.05), 19.7%(P<0.05), 30.7%(P<0.05), and 33.3%(P<0.05) respectively. There is no significant effect to the relative weights for other organs (P>0.05).