复合酸化剂对黄羽肉鸡消化道酶活性的影响

Effects of Compound Acidifiers on Digestive Enzyme Activity in Digestive Tract of Yellow-feathered Broilers

为了研究饲料中添加复合酸化剂对黄羽肉鸡消化道酶活性的影响,选择160只1日龄黄羽肉鸡,按公母比例一致的原则,随机分成A、B、C、D 4个处理组。A组饲喂基础日粮,B、C、D组分别饲喂在基础日粮中添加0.2%、0.5%、0.8%由乳酸、柠檬酸、富马酸组成(50∶35∶15)的复合酸化剂的日粮,在14、28、42、56日龄时测定胃内容物蛋白酶活性,十二指肠和空肠内容物淀粉酶、二糖(麦芽糖)酶和脂肪酶活性。结果显示:与A组相比,B组14日龄的腺胃内容物蛋白酶活性显著提高72.61%;C组28日龄的肌胃内容物、14日龄的腺胃内容物蛋白酶活性分别显著提高38.64%、69.55%;D组28、56日龄的肌胃内容物及14日龄的腺胃内容物蛋白酶活性分别显著提高46.25%、49.65%、92.84%。复合酸化剂对十二指肠和空肠内容物淀粉酶、二糖(麦芽糖)酶和脂肪酶活性均无显著影响。可见,复合酸化剂可显著提高黄羽肉鸡胃内容物蛋白酶活性。

The effects of compound acidifiers on digestive enzyme activity in the digestive tract of yellow-feathered broilers were studided.One hundred and sixty selected yellow-feathered broilers of one-day old were randomly divided into four groups（A,B,C,D）.Group A as control group was fed the basal diet.Group B,C and D as three trial groups were fed basal diet supplemented with0.2%,0.5%,0.8% composite acidifying diets,including lactic acid,citric acid,fumaric acid composition（50∶35∶15）.Pepsin of gastric contents,amylase and disaccharide（maltose）enzyme and lipase activity of duodenum and jejunum contents were determined at 14,28,42 and 56days old.The results showed that：Compared with group A,pepsin activity in glandular stomach contents was significantly increased by 72.61% in group B at 14 days old;pepsin activity in muscular stomach contents at 28 days old and glandular stomach contents at 14 days old were significantly increased by 38.64%and by 69.55%in group C;pepsin activity in muscular stomach contents at 28 and 56days old and glandular stomach contents at 14 days old were significantly increased by 46.25%,49.65%and 92.84%in group D.Duodenum and jejunum contents amylase,disaccharide（maltose）enzyme and lipase activities were not significantly affected with adding compound acidifiers.This indicates that pepsin activity in stomach content in yellow-feathered broilers was improved with adding compound acidifiers.