中国畜牧杂志2017，Vol.53Issue(7)：113-118,6.DOI:10.19556/j.0258-7033.2017-07-113
断奶日龄对仔兔胃肠道pH和消化酶活性的影响
Effects of Weaning Age on Gastrointestinal pH and Activity of Digestive Enzymes in Meat Rabbits
摘要
Abstract
This experiment was conducted to evaluate the effects of weaning age on digesta pH and enzyme activity of digestive tract in meat rabbits.A total of 90 nests of newborn meat rabbits were randomly selected and divided into 3 groups equally,which were arranged to be weaned in 21,28 and 35 days after their birth.At 21,28,35,42 and 49 days of age,digesta of digestive tract were collected after slaughter.The pH of the stomach and the intestine segments and the related enzyme activity were measured.The results showed that one week after weaning,the pH of the stomach and the duodenal content of rabbits weaned at 21 days significantly improved(P＜0.05).With the increase of age,the pH decreased significantly (P＜0.05).Additionally,the pH of the stomach and the duodenal contents presented declining trend with the weaning days kept longer.After 42 days,the difference could not be distinguished from three groups (P＞0.05).The activity of pepsase of the 21,28 and 35 days old weaned groups and the activity of the duodenal trypsin of the 21 days old weaned group significantly reduced in the first week after weaning(P＜0.05),while it did not showed strong effect on duodenum,jejunum and the activity of trypsin and amylase of the ileum(P＞0.05).But the activity of the enzyme mentioned above showed a raise tendency with the weaning days added.35 days later,no significant difference happened in each group (P＞0.05).In addition,the activity of these enzymes gradually became stronger and stronger with the increase of age.According to this,the different weaning age will affect young meat rabbits' digesta pH and the activity of digestive enzyme distinctly.Choosing their weaning days appropriately is vital to the development of gastrointestinal digestive function of young rabbits.关键词
断奶日龄/胃肠道pH/酶活性/仔兔Key words
Weaning age/Digesta pH/Enzyme activity/Meat rabbits分类
农业科技引用本文复制引用
卢垚,宋代军,郭志强,谢晓红,雷岷,李丛艳..断奶日龄对仔兔胃肠道pH和消化酶活性的影响[J].中国畜牧杂志,2017,53(7):113-118,6.基金项目
公益性行业(农业)科研专项(201303143) （农业）
国家兔产业技术体(CARS-44-B-4) （CARS-44-B-4）
家兔现代产业链关键技术集成研究与产业化示范(2016NZ0002) （2016NZ0002）
