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| 采食高营养水平饲粮早期断奶羔羊禁饲状态下消化道pH及消化酶活性的研究 | |
| 引用本文： | 年芳,杨子江,郭江鹏,马友记,张军成,王宏博,王彩莲,郝正里,李发弟.采食高营养水平饲粮早期断奶羔羊禁饲状态下消化道pH及消化酶活性的研究[J].甘肃农业大学学报,2007,42(5):28-33. |
| 作者姓名： | 年芳 杨子江 郭江鹏 马友记 张军成 王宏博 王彩莲 郝正里 李发弟 |
| 作者单位： | 1. 甘肃农业大学动物科学技术学院,甘肃,兰州,730070 2. 甘肃农业大学动物科学技术学院,甘肃,兰州,730070;甘肃省饲料工程技术研究中心,甘肃,兰州,730000 3. 甘肃农业大学动物科学技术学院,甘肃,兰州,730070;中国农业科学院兰州畜牧与兽药研究所,甘肃,兰州,730000 |
| 基金项目： | 甘肃省自然科学基金(3ZS061-A25-077)，甘肃省教育厅高等学校研究生导师科研项目(0702-07) |
| 摘 要： | 研究了采食高营养水平饲粮早期断奶羔羊禁饲状态下其皱胃、胰腺和小肠pH及消化酶活性.按同质原则将24只1月龄断奶杂交羔羊(无角陶塞特♂×寒滩♀)分为3组,接受3种高营养饲粮,3种饲粮精粗比分别为97.64∶2.36、91.88∶8.12、86.14∶13.86,能量水平分别为14.54、13.97、13.36 MJ/kg,粗蛋白水平分别为25.30%、23.03%2、0.73%.饲喂65 d后,禁食24 h屠宰,测定羔羊皱胃、胰腺和小肠pH及消化酶活性.结果表明:高营养水平饲粮对羔羊胰腺、皱胃和小肠各段黏膜和内容物pH影响不大,对消化道各段分泌的主要消化酶活性无显著影响(P>0.05).十二指肠、空肠各段、回肠黏膜pH在6.55~6.86,十二指肠、空肠前段和空肠中段内容物pH为6.30~6.69,空肠后段、回肠内容物pH在7.22~7.73.胰蛋白酶活性在回肠最高,糜蛋白酶活性在各肠段无显著差异,α-淀粉酶活性在空肠中段和回肠最高,脂肪酶活性在空肠中段最高. |
| 关 键 词： | 禁饲 营养水平 育肥羔羊 pH 消化酶 |
| 文章编号： | 1003-4315（2007）05-0028-06 |
| 修稿时间： | 2006-09-25 |
The alimentary tract pH and digestive enzymes activity of early weaned fattening lambs in fasting with high nutritional level feed |
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| NIAN Fang,YANG Zi-jiang,GUO Jiang-peng,MA You-ji,ZHANG Jun-cheng,WANG Hong-bo,WANG Cai-lian,HAO Zheng-li,LI Fa-di.The alimentary tract pH and digestive enzymes activity of early weaned fattening lambs in fasting with high nutritional level feed[J].Journal of Gansu Agricultural University,2007,42(5):28-33. | |
| Authors: | NIAN Fang YANG Zi-jiang GUO Jiang-peng MA You-ji ZHANG Jun-cheng WANG Hong-bo WANG Cai-lian HAO Zheng-li LI Fa-di |
| Institution: | 1. College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China; 2. Gansu Feed Engineering and Technology Research Centre,Lanzhou 730000,China; 3. Lanzhou Institute of Animal Husbandry and Animal Medicine,Chinese Academy of Agricultural Science,Lanzhou 730000,China |
| Abstract: | The alimentary tract pH and digestive enzymes activity of early weaned fattening lambs with high nutritional feed when fasting 24 hours were studied.Twenty-four individuals of crossbreed lambs(Poll Dorest ♂×Small-tail Han×Tan ♀,50 days age) were divided into three groups at three high nutritional levels.The ratios of concentrate to roughage of three nutritional levels were 97.64∶2.36(A),91.88∶8.12(B),and 86.14∶13.86(C);crude protein rate were 25.30 %,23.03 % and 20.73 %,energy levels were 14.54,13.97 MJ/kg and 13.36 MJ/kg respectively.The results showed that different high nutritional levels had no significant effect on pH of pancreas,abomasums and intestine mucous and content(P>0.05).And different nutritional levels had no significant effect on activity of digestive enzymes of the fatte ning lambs(P>0.05).The pH of mucosa was 6.55～6.86 in duodenum,jejunum and ileum.The pH of content was 6.30～6.69 in duodenum,anterior segment and middle piece of jejunum.The pH content was 7.22～7.73 in posterior segment of jejunum and ileum.Activity of trypsin was the highest in ileum,while there was no significant difference on activity of chymotrypsin intestine,Activity of α-amylase was the highest in middle piece of jejunum and ileum,while activity of lipase was the highest in middle piece of jejunum. |
| Keywords: | fasting nutritional level fattening lamb pH digestive enzyme |
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