罗斯鸡与快大型黄羽肉鸡消化生理比较研究

发布时间：2018-03-24 07:40

本文选题：消化生理　切入点：食糜排空速率　出处：《中国家禽》2017年18期

【摘要】：选用罗斯308公鸡和快大型黄羽肉公鸡进行饲养对比试验,探讨罗斯鸡和黄羽肉鸡胃肠道消化生理的差异。1日龄罗斯308公鸡和快大型黄羽肉公鸡各240只,设为罗斯鸡组和快大型黄羽肉鸡组,每个组12个重复,每个重复20只鸡。分别于1、7、14、21、28、35、42、49、56、63日龄屠宰,测定体重,采集肌胃、腺胃、各个小肠段对比两个鸡种消化器官重量、长度和pH值的差异,同时检测4、8、14、16、24、36、48 h食糜在鸡消化道的排空速率。黄羽肉鸡和罗斯鸡消化道内的pH值无显著差异(P0.05);黄羽肉鸡的消化器官(腺胃、肌胃)的相对重量和相对长度(十二指肠、空肠、回肠)高于罗斯鸡;黄羽肉鸡食糜排空速率(排空时间4~24 h)比罗斯鸡快,表明罗斯鸡具有更长的养分吸收时间。黄羽肉鸡和罗斯鸡随禁食时间的延长,消化道内容物减少,食糜排空规律基本一致。
[Abstract]:The difference of gastrointestinal digestive physiology between Roth 308 rooster and fast large yellow feather cock was studied. The difference of gastrointestinal digestive physiology between Roth 308 rooster and yellow feather broiler was studied. There were 240 ros308 rooster and 240 fast yellow feather meat rooster each. Roth group and fast large yellow feather broiler group were divided into two groups, 12 replicates in each group, 20 chickens in each group, slaughtered at the age of 1: 7, 1414, 21, 2828, 35, 42, 49, 49, 56, 63 days old, to measure their body weight, collect muscle stomach, glandular stomach, and compare the weight of the digestive organs of the two breeds with each small intestinal segment. The difference in length and pH value was also used to detect the emptying rate of chyme in digestive tract for 48 h. There was no significant difference in pH value between yellow broiler and Ross chicken (P 0.05), and the digestive organ (glandular stomach) of yellow feather broiler. The relative weight and length of muscle stomach (duodenum, jejunum, ileum) were higher than that of Roth chicken, and the rate of chyme emptying (emptying time 4 ~ 24 h) of yellow feather broiler was faster than that of Buraas chicken. The results showed that Roth chicken had longer nutrient absorption time. With the increase of fasting time, the contents of digestive tract decreased and the excretion regularity of chyme was basically the same between yellow broiler and Roth chicken.
【作者单位】：广东省农业科学院动物科学研究所畜禽育种国家重点实验室农业部华南动物营养与饲料重点实验室广东省动物育种与营养公共实验室广东省畜禽育种与营养研究重点实验室;
【基金】：现代农业产业技术体系建设专项资金(CARS-41) 广东省畜禽育种与营养研究重点实验室运行经费(2014B030301054) 国家“十二五”科技支撑计划项目子课题(2014BAD13B02) 广东省科技攻关项目(2017B020202003)
【分类号】：S831.1

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