In this study,40 weaning rex rabbits were used to investigate the effect of compound organic acid in drinking water on intestinal mucosal morphology and visceral organ development. The weight of visceral organ and villous height (VH), crypt depth (CD), intestinal wall thickness ( IWT) and villous height/crypt depth (VH/CD) were measured at the 35th day after weaning. 20 male and 20 female rabbits with similar weight, 35 days old, were randomly divided into four groups;group A , group B, group C and group D. Each rabbit was treated as one repeat, group A was the control group, drinking ordinary tap water. The pH of drinking water in group B, C and D was 5. 0, 4. 3 and 3. 6, respectively. To get the required pH, compound acid was added to the ordinary tap water in group B,C and D by 0. 55%, 0. 85% and 3.3%. The results showed that drinking acidification water can significantly improve the spleen weight, spleen index and duodenum VH (P<0. 05), and significantly reduce jejunum IWT, and for group Cthe best result was reached with pH 4. 3 in waters for group D water with pH3. 6 reduced ileum IWT significantly (P<0. 05). Drinking acidification water improved the weight of visceral organs and the organs index in other experimental groups, but there is no significant difference compared with the control group (P >0. 05). Drinking acidification water also improved jejunum and ileum morphology to some extent, and the group with pH 4. 3 showed more improvement, but there was no significant difference (P>0. 05). It showed that acidification drinking water improved the development of the visceral organs and intestinal morphology to some extent, and the one with pH 4. 3 showed the best performance.%通过在饮水中添加不同量的复合酸,研究不同pH饮水对断奶獭兔肠道形态及内脏器官发育的影响.40只体重相近的35日龄美系白色断奶獭兔按公母各半随机分为4组,每组10只,A组为对照组,饮用自来水；B组饮水中添加0.55％复合酸,pH 5.0;C组饮水中添加0.85％复合酸,pH 4.3；D组饮水中添加3.3％复合酸,饮水pH3.6.结果表明,与对照组相比,pH4.3饮水能显著增加脾脏重和脾脏指数(P＜0.05)；酸化饮水能提高断奶獭兔其他内脏器官重,改善内脏器官指数,但和对照组相比差异不显著(P＞0.05).酸化饮水可以改善断奶獭兔肠道形态,增加绒毛高度、降低隐窝深度,饮水酸度pH4.3时可显著增加十二指肠绒毛高度(P＜0.05),并降低空肠肠壁厚度(P＜0.05)；饮水酸度pH 3.6时可显著降低回肠肠壁厚度(P＜0.05)；酸化饮水对空肠、回肠绒毛高度、绒毛高度/隐窝深度和肠壁厚度也有一定改善,以pH 4.3饮水酸度改善最好,但差异不显著(P＞0.05).结果显示,酸化饮水可以在一定程度上改善断奶獭兔内脏器官发育和肠道形态,其中以pH4.3改善效果最好.
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