Pinion J L, Bilgili S F, Hess J B
Poultry Science Department, Auburn University, Alabama 36849-5416, USA.
Poult Sci. 1995 Feb;74(2):383-90. doi: 10.3382/ps.0740383.
Live performance and carcass quality of female broilers were evaluated under four coccidiostat programs (CP) and two feed treatments. The CP consisted of halofuginone (H) and salinomycin (S), fed either continuously (HH and SS) or in rotational programs (HS and SH), during the starter (1 to 21 d) and grower (22 to 35 d) periods, respectively. All groups received an unmedicated withdrawal feed from 36 to 42 d. Feed treatments consisted of a control and a fortified diet high in proline and supplemented with additional ascorbic acid and zinc (50 birds per pen; 4 pens per feed; 8 pens per CP). In addition to live performance and skin puncture strength, carcass quality attributes following processing (at 43 d of age) were assessed. No CP by feed interactions were detected for any of the variables measured. The CP treatments did not differ for live performance. Birds on fortified feed were heavier at 21 d (P < .001) and had an improved feed conversion at 42 d (P < .05). Skin puncture strength was significantly reduced for the birds fed H, either in continuous (HH) or rotational programs (HS and SH). Skin sores-scratches and tears were lowest for the SS and SH groups. The HH treatment resulted in fewer grade A carcasses (P < .001). Halofuginone, when fed continuously or in the starter feed, affected carcass quality of broilers. Higher dietary proline or supplementation with ascorbic acid and zinc did not appear to alleviate the effects of halofuginone on skin quality.
在四种抗球虫药方案（CP）和两种饲料处理条件下，对雌性肉鸡的生长性能和胴体品质进行了评估。CP由常山酮（H）和盐霉素（S）组成，分别在雏鸡期（1至21日龄）和生长期（22至35日龄）连续投喂（HH和SS）或交替投喂（HS和SH）。所有组在36至42日龄期间均接受无药的停药期饲料。饲料处理包括对照饲料和富含脯氨酸并额外添加抗坏血酸和锌的强化日粮（每栏50只鸡；每种饲料4栏；每种CP 8栏）。除了生长性能和皮肤穿刺强度外，还评估了屠宰后（43日龄时）的胴体品质属性。在所测量的任何变量中均未检测到CP与饲料的交互作用。CP处理在生长性能方面没有差异。饲喂强化饲料的鸡在21日龄时体重更重（P <.001），在42日龄时饲料转化率有所提高（P <.05）。无论是连续投喂（HH）还是交替投喂（HS和SH），饲喂H的鸡的皮肤穿刺强度均显著降低。SS和SH组的皮肤溃疡、划痕和撕裂最少。HH处理导致A级胴体数量减少（P <.001）。连续或在雏鸡期饲料中添加常山酮会影响肉鸡的胴体品质。较高的日粮脯氨酸水平或添加抗坏血酸和锌似乎并不能减轻常山酮对皮肤品质的影响。
