摘要
选用 4 8头始重为 1 0 kg左右的杜长加断奶仔猪 ,随机分成对照和试验 2组 ,饲以基础饲粮。试验组中添加 80 0 mg/kg甜菜碱 ,试验期 3 6d,每天记录腹泻头数。结束前 1周进行消化试验 ,结束时进行屠宰试验 ,取十二指肠内容物及其电镜切片样品。结果表明 ,添加甜菜碱组饲粮中干物质和粗蛋白的消化率较对照组分别提高 4 .2 4 %( P <0 .0 5)和 6.4 5%( P <0 .0 5) ;腹泻率较对照组降低 3 3 .80 %( P <0 .0 1 ) ;十二指肠内容物中总蛋白水解酶活力比对照组高 53 .3 2 %( P<0 .0 5) ;脂肪酶和淀粉酶活力与对照组差异不显著 ( P>0 .0 5) ;十二指肠电镜切片显示 ,甜菜碱组猪十二指肠微绒毛长度和密度均比对照组明显改善 ,其长度较对照组提高 1 6.1 9%( P <0 .0 5)。上述结果提示 ,饲粮中添加甜菜碱能明显改善断奶仔猪的消化机能 ,提高饲粮中养分的消化与利用 ,其主要原因在于甜菜碱改善了断奶仔猪消化系的生长发育状况 。
The experiment was conducted to study the effect of betaine on the digestive function of weaned piglets. Fourty eight weaned piglets(Duroc×Landrance×Jia) were allotted randomly to two groups, each of which included three replicates of eight pigs. The treatment groups received the same basal diet supplemented 0, 800 mg/kg betaine for 36 d, respectively. The results were as follows: Addition of betaine to diet improved apparent digestibilities of DM and CP in the diet, of which were increased by 4.24%(P<0.05) and 6.45%(P<0.05), respectively. Diarrhoea, morbidity reduced by 33 80%(P<0.01). The activity of proteolytic enzyme was promoted by 52.32%(P<0.05). Transmission electron microscopy showed that the microvilli of the duodenum were longer by 16.19% (P<0 05) and more uniform than that of control. It implicates that addition of betaine in the diet can significantly improve the digestive function of weaned piglets.
出处
《中国兽医学报》
CAS
CSCD
北大核心
2000年第2期201-204,共4页
Chinese Journal of Veterinary Science
基金
浙江省科委攻关项目! ( 95 2 0 2 3 A)
