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首页> 外文期刊>Poultry Science >Effect of different levels of dietary zinc, manganese, and copper from organic or inorganic sources on performance, bacterial chondronecrosis, intramuscular collagen characteristics, and occurrence of meat quality defects of broiler chickens
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Effect of different levels of dietary zinc, manganese, and copper from organic or inorganic sources on performance, bacterial chondronecrosis, intramuscular collagen characteristics, and occurrence of meat quality defects of broiler chickens

机译：来自有机或无机来源的不同日粮锌，锰和铜水平对肉仔鸡生产性能，细菌软骨坏死，肌内胶原特性和肉质缺陷发生的影响

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摘要

The aim of the experiment was to assess the effects of 2 dietary levels of trace minerals (TM) zinc, manganese, and copper either from organic (OTM) or inorganic (ITM) sources on broiler performance, carcass traits, intramuscular collagen (IMC) properties, occurrence of hock burns (HB), foot pad dermatitis (FPD), femoral and tibia head necrosis, and breast muscle abnormalities (white striping, WS; wooden breast, WB; poor cohesion, PC). A total of 3,600 one-day-old male chicks were randomly assigned to one of 4 dietary treatments in a 2 x 2 factorial arrangement (9 replicates of 100 birds/dietary treatment). Birds were slaughtered at 31 (thinning) and 51 d of age. Body weight, daily weight gain (DWG), feed intake, feed conversion rate (FCR), and mortality were determined. A significant effect of the source of TM supplementation was found only in 51-day-old chickens. Birds of the OTM groups were heavier (P 0.05), with a higher (P 0.05) DWG and a better FCR (P 0.05) compared with those of the ITM groups. OTM significantly reduced the lesion scores of femoral head (P = 0.004) and total leg (femur + tibia, P = 0.02) compared to ITM, which is mainly caused by the reduction of the percentages of femoral head transitional degeneration (FHT, P = 0.04) and femoral head necrosis (FHN, P = 0.07). Carcass traits were similar among the experimental groups. No alleviating effect of TM administration on the incidence of FPD and HB in 31- and 51-day-old chickens was found. Similarly, the occurrence and the degrees of WS and WB in 51-day-old chickens was affected neither by the doses nor by the source of TM supplied. IMC characteristics of broiler pectoral muscle were not affected (P > 0.05) by the different sources and doses of TM administrated.
机译：该实验的目的是评估两种饮食水平的有机（OTM）或无机（ITM）来源的微量矿物质（TM）锌，锰和铜对肉鸡生产性能，car体性状，肌内胶原（IMC）的影响特性，发生的飞节烧伤（HB），足垫皮炎（FPD），股骨和胫骨头坏死和乳腺肌肉异常（白色条纹，WS;木乳，WB;内聚力差，PC）。总共将3600只1天大的雄性小鸡以2 x 2因子分配方式随机分配到4种饮食处理中的一种（每只饮食处理9重复）。在31岁（稀疏）和51天龄时宰杀了鸟类。确定体重，日增重（DWG），采食量，饲料转化率（FCR）和死亡率。仅在51日龄的鸡中发现TM补充源的显着效果。与ITM组相比，OTM组的鸟更重（P <0.05），DWG更高（P <0.05），FCR更好（P <0.05）。与ITM相比，OTM显着降低了股骨头（P = 0.004）和总腿（股骨+胫骨，P = 0.02）的病变评分，这主要是由于降低了股骨头过渡变性的百分比（FHT，P = 0.04）和股骨头坏死（FHN，P = 0.07）。实验组之间的体特征相似。没有发现TM给药对31日龄和51日龄鸡FPD和HB发生率有缓解作用。同样，在51日龄鸡中WS和WB的发生和程度也不受剂量和所供应TM的来源的影响。肉鸡胸肌的IMC特征不受TM来源和剂量的影响（P> 0.05）。

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