【摘要】 试验用72头三种类型的断奶仔猪研究荣昌猪及其杂交猪生长期饲粮锌的适宜添加量。试验结果表明饲喂基础饲粮(含30ppm锌)的长×汉荣和长×荣杂交猪及荣昌猪都出现缺锌症状,以长×荣杂交猪最敏感,荣昌猪最次。在该饲粮中加30ppm锌可防止猪的皮肤不全角化症的产生,但为获得理想的成绩和保证锌的生物学功能,建议20—35公斤阶段的三元和二元杂交猪饲粮中添加90ppm锌,荣昌猪加60ppm锌为宜。35—60公斤阶段,三元和二元杂交猪加60ppm锌,荣昌猪加30ppm锌为宜。生长速度较快,瘦肉率较高的杂交猪的锌添加量似有比荣昌猪高的趋势。更多还原

【Abstract】 This experiment was conducted to study adequate supplemental levels of zinc in diets for the growing Rong Chang and crossbred barrow. Zinc-deficient basal diet (30ppm zn) resulted in deficiency symptoms in Landrace X Hampshire Rong Chang (L×HR), Landrace X Rong Chang (L×R) and Rong Chang(R). The severity of dificiency was in the order of L XR, L X HR and R. Parakeratosis could be prevented by a supplement of 30ppm zinc in the diets. Itseeros that zinc requirement of the two crossbreds which grow faster is higher than that of Rong Chang barrows. The Changes of serum alkaline phosphatase activity, serum zinc concentration and the percent of unsaturated serum-zinc binding capacity were determined. The results showed that the percent of unsaturated serum-zinc binding capacity seemed to be a sensitive indicotor of zinc nutrient status of pigs.更多还原