早期断奶羔羊饲粮的可消化性及对消化道发育的影响

畜牧兽医学报 ›› 2008, Vol. 39 ›› Issue (8): 1069-1074.

早期断奶羔羊饲粮的可消化性及对消化道发育的影响

郭江鹏^1，3，4，王宏博^1，2，李发弟^1，3，郝正里¹*

1. 甘肃农业大学动物科技学院，兰州 730070；2.中国农业科学院兰州畜牧与兽药研究所，兰州 730050；3.甘肃省饲料工程技术研究中心，兰州 730070；4.兰州博亚饲料有限公司，兰州 730000

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-08-24 发布日期:2008-08-24
通讯作者: 郝正里

Digestion of Diets for Early Weaning Lambs and Their Effects on Development of Lamb Alimentary Tract

GUO Jiang-peng^1,3,4，WANG Hong-bo^1,2，LI Fa-di^1,3，HAO Zheng-li¹

1. Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070,China; 2. Institute of Animal Husbandry and Veterinary Medicine, Chinese Academy of Agricultural Sciences, Lanzhou 730050,China; 3. Gansu Provincial Research Centre of Feeds Engineering & Techniques, Lanzhou 730070,China;4. Lanzhou Boya Feeds Company Ltd, Lanzhou 730000,China

Received:1900-01-01 Revised:1900-01-01 Online:2008-08-24 Published:2008-08-24
Contact: HAO Zheng-li

摘要/Abstract

摘要： 将平均355日龄的24只无角陶赛特羊(♂)与小尾寒羊×滩羊(♀)的三元杂交一代断奶羔羊分为3组，每组♂1、♀7，单栏饲养；经15 d预试后，正试期50 d中分别饲喂不同消化能（DE）与粗蛋白质（CP）水平的强度育肥饲粮，Ⅰ组为0.9倍NRC，Ⅱ组为1.0倍NRC，Ⅲ组为1.1倍NRC水平；正试期第21~26天，从每组选5只母羔进行消化试验收集，测定各组饲粮的可消化性；正试期结束后，每组屠宰4只接近组体重均值的母羔，测定消化道发育状况。结果表明，经分析饲粮的DM、OM、CP和ADF表观消化率（DMD、OMD、CPD、ADFD）均随其营养水平提高而线性上升。饲粮Ⅲ的DMD与OMD显著高于Ⅰ（P＜0.01）和Ⅱ（P＜0.05）；Ⅲ的CPD显著高于Ⅰ、Ⅱ（P＜0.01），Ⅱ也显著高于Ⅰ（P＜0.05）；饲粮Ⅰ的ADFD极显著低于Ⅲ（P＜0.01）。钙与磷的表观消化率（CaD、PD）的变化与饲粮营养水平间规律性不强。饲粮营养水平对羔羊全消化道相对重（%宰前活重）和各胃室相对重(%全胃重)的影响不显著（P＞0.05）；各组羔羊的瘤网胃相对重均达到成年羊的水平。

关键词: 羔羊, 早期断奶, 强度育肥, 营养水平, 可消化性, 消化道

Abstract: The trial was combined with a feeding experiment, in which twentyfour three-way cross-bred lambs(Poll Dorset♂×Small Tailed Han×Tan♀, averaged at 35.5 days old) were divided into three groups and each with eight lambs(♂1,♀7)，pen-fed singly. The experiment lasted sixty-five days including 15 days for the preliminary period. Lambs were fed with three diets at different levels of digestible energy(DE) and crude protein (CP),i.e.I- 0.9NRC,II- 1.0NRC and Ⅲ-1.1NRC， respectively, during the recording period of 50 days.Sampling of the digestion trial using five female lambs for each group were made from the days 21 to 26 during the recording period, and four lambs(♀) in each group were slaughtered at the end of the feeding experiment to study the digestion of these diets and the development of alimentary tract for lambs. The results showed that the apparent digestibility of dry matter, organic matter, crude protein and acid detergent fiber（DMD, OMD, CPD,ADFD） increased with the raising of nutrition level in diets. DMD and OMD were higher for diet Ⅲ than that for Ⅰ（P＜0.01）and Ⅱ（P＜0.05）; CPD from Ⅲ was higher than that from Ⅰ and Ⅱ（P＜0.01）, DMD of Ⅱ was higher than that of Ⅰ（P＜0.05）.The ADFD of Ⅰ was lower than that of Ⅲ（P＜0.01）. The changes of apparent digestibility of calcium and phosphorus (CaD ,PD) were not regular as nutrition levels. The weight of alimentary tract(% of lifeweight before slaughtering) and the weight of each compartment of stomach(% weight of whole stomach) were not affected by nutrition levels（P＞0.05）. The weight of rumenreticulum(% weight of whole stomach) for the lambs of all groups had reached the levels of adult sheep.

Key words: lambs, early weaning, intensive fattening, nutrition level, digestion, alimentary tract

郭江鹏;;王宏博;李发弟;郝正里. 早期断奶羔羊饲粮的可消化性及对消化道发育的影响[J]. 畜牧兽医学报, 2008, 39(8): 1069-1074.

GUO Jiang-peng;;WANG Hong-bo;LI Fa-di;HAO Zheng-li. Digestion of Diets for Early Weaning Lambs and Their Effects on Development of Lamb Alimentary Tract [J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2008, 39(8): 1069-1074.

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