摘要
以三元杂种猪为对照,研究了东北民猪在3种NDF水平(0、10、20％)下消化道形态及后肠内容物鲜重的变化。试验从活重30千克开始,80千克结束时,每组在最后一次给食后的2、4、8、12或16小时随机屠宰2头。电击晕死后立即开膛取出内脏,分为胃、小肠、盲肠和结肠4段进行测量。结果表明猪对饲粮纤维含量的增加从胃肠道形态上发生明显的适应性变化,消化道长度、鲜重增加,尤其结肠长度增加明显,胃、小肠和结肠的鲜重显著地高于基础饲粮组。民猪胃重和结肠鲜重及长度的增加比对照杂种猪明显,消化道总鲜重及其占空体重的比例显著地高于对照杂种猪。随NDF水平的提高,大肠内容物鲜重明显增加,其中民猪更为突出,后肠是吸收水分的主要场所。
The morphological changes of alimentary tract of the Northeast Min pig fed the diets containing 0 , 10 or 20% NDF were measured in the experiment, compared with the three-way crossbred as the control.Two barrows of each pen were slaughted at 2 , 4 , 8 , 12 or 16 hour after the last meal. Viscera were removed from the abdominal cavity and separated immediately by ligature into four segments : stomach, small intestine, caecum and colon plus rectum. It was indicated that the wet weights of all gastrointestinal tract segments and lengths of small intestine and large intestine,particularly the wet weight and length of colon and the weight of stomach, were significantly higher in pigs fed fibrous feed. Higher wet weights of stomach and colon of the Min pig indicated that the breed was more adaptable to fibrous materials than the control. Increased amount of NDF in diets was accompanied by high undigested residue in the large intestine. The wet weight of digesta in hindgut of Min pig was more than that of the control. The distal colon was the primary site where water was absorbted.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
1992年第1期34-38,共5页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家自然科学基金资助项目
关键词
纤维饲料
消化道形态
结肠
猪
Indigenous breed of pig, Byproduct, Alimentary tract, Colon
