开食料中性洗涤纤维与淀粉不同比例对羔羊消化道发育的影响  

Effects of different ratios of neutral detergent fiber to starch in starters on the development of digestive tract of lambs

作　　者：刘国华[1] 赵海碧 汪晓娟[1] 庞鑫 吕凤 LIU Guohua;ZHAO Haibi;WANG Xiaojuan;PANG Xin;LYU Feng(College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃农业大学动物科学技术学院,甘肃兰州730070

出　　处：《草业科学》2022年第3期571-578,共8页Pratacultural Science

基　　金：国家自然科学基金项目(31760682)。

摘　　要：选择60只初生重[(3.14±0.05) kg]相近的湖羊公羔,随机分为3组,每组20只,10日龄开始补饲中性洗涤纤维(neutral detergent fiber, NDF)与淀粉比例分别为0.50 (Ⅰ组)、0.70 (Ⅱ组)和1.00 (Ⅲ组)的开食料,35日龄断奶,至56日龄屠宰,研究开食料NDF与淀粉不同比例对羔羊消化道发育的影响。结果表明:1)Ⅱ组的瘤胃乳头高度、网胃初级皱裂高度、皱裂宽度以及肌层厚度显著高于Ⅰ组和Ⅲ组(P <0.05),Ⅲ组的瘤胃乳头高度极显著高于Ⅰ组(P <0.01)。2)Ⅱ组的十二指肠和回肠隐窝深度显著低于Ⅰ组和Ⅲ组(P <0.05),肌层厚度显著高于Ⅰ组和Ⅲ组(P <0.05),Ⅲ组的十二指肠隐窝深度极显著低于Ⅰ组(P <0.01)。由此可见,NDF与淀粉比例为0.70的开食料有利于羔羊消化道发育,该结果为羔羊开食料的配置提供了参考。In this study, we investigated the effects of neutral detergent fiber(NDF) to starch ratios on the development of the digestive tract of lambs. Sixty male Hu lambs with similar birth weights [(3.14 ± 0.05) kg] were randomly divided into three groups with 20 lambs in each group. At 10 days of age, the lambs were supplemented with NDF to starch ratios of 0.50(group Ⅰ), 0.70(group Ⅱ) and 1.00(group Ⅲ). They were weaned at 35 days of age and slaughtered at 56 days of age.Following results were obtained: 1) The height of the rumen papilla, the height and width of the primary crease of the reticulum, and the thickness of the muscular layer in group Ⅱ were significantly higher than those in groups Ⅰ and Ⅲ(P < 0.05),while the height of the rumen papilla in group Ⅲ was significantly higher than that in group Ⅰ(P < 0.01). 2) The crypt depth of the duodenum and ileum in group Ⅱ was significantly lower whereas the thickness of the muscular layer was significantly higher than that observed in groups Ⅰ and Ⅲ(P < 0.05). The crypt depth of the duodenum in group Ⅲ was significantly lower than that in group Ⅰ(P < 0.01). In conclusion, starting diets with an NDF to starch ratio of 0.70 is beneficial for the digestive tract development of lambs. The results of this study can provide a reference for the preparation of starter diets for lambs.

关 键 词：开食料 中性洗涤纤维 淀粉 羔羊 瘤胃 肠道 组织形态 

分 类 号：S826.5[农业科学—畜牧学]