不同来源高粱替代玉米对黄羽肉鸡生长性能、肠道黏膜形态结构和血清指标的影响

本试验旨在研究不同来源高粱替代玉米对黄羽肉鸡生长性能、屠宰性能、肠道黏膜形态结构及血清生化和抗氧化指标的影响。试验选取350羽1日龄体重相近的健康黄羽公鸡,随机分为7个组,每组5个重复,每个重复(栏)10只鸡。各组分别饲喂7种不同饲粮:基础饲粮(对照),分别以美国高粱、湖南高粱、内蒙古高粱替代基础饲粮中30%玉米,分别以美国高粱、湖南高粱、内蒙古高粱替代基础饲粮中50%玉米。试验全期56 d,分为前期(1~28日龄)、后期(29~56日龄)2阶段进行。结果表明:1)与对照组相比,3种不同来源高粱以30%、50%比例替代玉米对黄羽肉鸡生长性能无不良影响。2)湖南高粱替代50%玉米腹脂率较对照组显著提高(P0.05),其他各屠宰性能指标各组间均无显著差异(P0.05)。3)前期各组十二指肠的绒毛高度、隐窝深度和绒毛高度/隐窝深度(V/C)值,空肠的绒毛高度、V/C值,回肠的肠绒毛高度、隐窝深度均无显著差异(P0.05);与对照组相比,美国高粱替代50%玉米显著提高了回肠V/C值(P0.05)。4)前期,随着内蒙古高粱和湖南高粱替代玉米的比例升高,血清中谷胱甘肽过氧化物酶(GSH-Px)活性略有下降趋势(P0.05);后期,随着内蒙古高粱和湖南高粱替代玉米的比例升高,血清总抗氧化能力(T-AOC)提高,50%替代时极显著提高(P0.01)。综上所述,在本试验中不同类型高粱替代玉米对黄羽肉鸡生长性能无不利影响,综合肠道黏膜形态结构及血清抗氧化指标认为以内蒙古高粱替代基础饲粮中50%玉米效果最佳。

Effects of Different Sources of Sorghum to Replace Corn on Growth Performance,Intestinal Mucosal Morphological Structure and Serum Indices of Yellow-Feathered Broilers

This study was conducted to investigate the effects of different sources of sorghum to replace corn on growth performance, slaughter performance, intestinal morphological structure and serum biochemical and antioxidant indices of yellow-feathered broilers.A total of 350 healthy 1-day-old yellow-feathered broilers with similar body weight were randomly selected and allocated to 7 groups with 5 replicates per group and 10 broilers per replicate.Each group was fed one of seven diets: basal diet (control), America sorghum, Hunan sorghum and Inner Mongolia sorghum replacing 30% corn, respectively, America sorghum, Hunan sorghum, Inner Mongolia replacing 50% corn, respectively.The feeding period lasted for 56 days, and was divided into early stage (1 to 28 days of age) and later stage (29 to 56 days of age).The results showed as follows: 1) compared with control group, three different sources of sorghum replacing corn by 30% and 50% had no adverse effects on growth performance.2) Compared with control group, the percentage of abdominal fat of broilers feeding Hunan sorghum to replace 50% corn was significantly higher (P<0.05), while other slaughter performance indices were not significantly different among groups (P>0.05).3) At early stage, compared with control group, there were no significant differences in villus height, crypt depth and villus height/crypt depth (V/C) value in duodenum, villus height and V/C value in jejunum, and villus height and crypt depth in ileum (P>0.05);compared with control group, America sorghum replacing 50% corn significantly increased ileum V/C value (P<0.05).4) At early stage, with the increase of the replacing proportion of Inner Mongolia sorghum and Hunan sorghum, serum glutathione peroxidase (GSH-Px) activity decreased slightly (P>0.05);at later stage, with the increase of the replacing proportion of Inner Mongolia sorghum and Hunan sorghum, serum total antioxidant capacity (T-AOC) was increase, and it was significantly increased when the replacing proportion was 50% (P<0.01).In conclusion, there is no adverse effect on growth performance of yellow-feathed broilers feeding different sorghum instead of corn.The yellow-feather broilers feeding Inner Mongolia sorghum to replace 50% corn achieve the best effect according to intestinal mucosa morphological and serum antioxidant indices.