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首页> 外文期刊>Revista Brasileira de Ciência Avícola >Effect of Different Dietary Threonine Levels on Optimal Growth Performance and Intestinal Morphology in 1-14 Days Old Ross 308 Broilers
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Effect of Different Dietary Threonine Levels on Optimal Growth Performance and Intestinal Morphology in 1-14 Days Old Ross 308 Broilers

机译：不同膳食苏氨酸水平对1-14天罗斯308肉鸡最佳生长性能和肠形态的影响

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SUMMARY This experiment was carried out to evaluate the effects of four levels of dietary threonine (Thr) supplementations on growth performance, gut size and histomorphometric alterations of small intestines in broiler chicks in 1-14 days. Two hundred eighty-eight Ross 308 one-day-old male broiler chicks were randomly assigned to four treatments with six replicates (12 birds per replication) received a common diet based on corn, wheat and soybean meal that met nutrients requirement of Ross 308. Birds were fed dietary treatments consisting of four levels of standardized digestible (SD) Thr: control diets (Basal diets) containing 0.65% SD Thr, 0.89% SD Thr (nutrients requirement of Ross 308), 0.93% and 0.97% SD Thr. Body weight gain (BWG), feed intake (FI) and feed conversion ratio (FCR) were measured at 1, 7 and 14 days old. Morphometric analysis of small intestine was carried out to investigate the effect of Thr levels on development of small intestines in starter period of broiler chicks. Results indicated that Thr levels improved FCR (quadratic effect, p=0.044) and BWG (quadratic effect, p=0.0009) for broilers given the diets containing 0.89% SD Thr in the starter period compared to other treatments (p<0.05). Furthermore, villus height and muscular thickness in duodenumand muscular thickness in jejunum were increased by this treatment (p<0.05). Villus width was increased by Thr treatments comparing to control group, as well. In conclusion, broiler performance and intestinal morphometry were improved by Thr supplementation which were efficiently obtained by 0.89% SD Thr in the first two weeks of the broiler???′s diet.
机译：发明内容进行了本实验，以评估四种饮食苏氨酸（Thr）补充对肉鸡雏鸡中小肠的生长性能，肠尺寸和组织形势形状的影响的影响。两百八十八罗斯308单日雄性肉鸡小鸡被随机分配到四种治疗方法，六次重复（每复制12只鸟）基于玉米，小麦和大豆餐的常见饮食，以满足罗斯308的营养需求。鸟类喂养由四个水平的标准化消化（SD）THR组成的饮食治疗：控制饮食（基础饮食）含有0.65％SD THR的0.89％SD THR（罗斯308的营养需求），0.93％和0.97％SD THR。体重增加（BWG），进料摄入（FI）和饲料转化率（FCR）在1,7和14天内测量。进行了对小肠的形态学分析，探讨了THR水平对肉鸡雏鸡起动时期小肠发育的影响。结果表明，在与其他处理相比，在起动时期含有0.89％SD THR的饮食，THR水平改善了FCR（二次效果，P = 0.044）和BWG（二次效果，P = 0.0009），与其他处理相比，含有0.89％SD Thr的饮食（P <0.05）。此外，通过这种处理增加了Jejunumand肌肉厚度的绒毛高度和肌肉厚度（P <0.05）。与对照组相比，THR治疗的别墅宽度也增加了。总之，Thr补充提高了肉鸡性能和肠形态学，其在肉鸡的前两周内有效地获得0.89％SD Thr。

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