不同断奶日龄仔猪消化道酸度和胃蛋白酶活性的动态变化  

EFFECT OF WEANING AGE ON pH AND GASTRIC PEPSIN ACTIVITY IN DIGESTIVE TRACT OF PIGLET

作　　者：杨琳[1] 张宏福[2] 李长忠[2] 顾宪红[2] 方路[2] 马永喜[2] 龚利敏[3] 冯广明 

机构地区：[1]华南农业大学动科院 [2]中国农科院畜牧所,北京100094 [3]中国农业大学动物科技学院,北京100094 [4]北京华都集团示范猪场,北京101407

出　　处：《畜牧兽医学报》2001年第4期299-305,共7页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家九五重点科技攻关项目 (96 0 0 9 0 1 0 6);国家自然科学基金资助项目 (39770 5 48)

摘　　要：将 12窝同日龄新生仔猪随机分成 4组 ,每组 3窝 ,每窝为一个重复组 ,分别采取 17、2 1、2 8和 3 5日龄断奶。在断奶后 12h、1周、2周和 3周从每个重复组中随机抽取 1头屠宰 ,共测定了 54头仔猪胃、十二指肠、空肠和回肠食糜 pH值及胃食糜中胃蛋白酶的活性。结果发现断奶后 12h胃食糜 pH值均高于同龄哺乳仔猪 ,并且达该组整个试验期间的最高值 ,随后逐渐降低。 4组仔猪在断奶后胃pH值回复到 3 5所需的时间分别为 3、2、1和 1周 ,这表明断奶日龄越早 ,胃中 pH值回复到 3 5所需要的时间越长。除十二指肠外 ,空肠和回肠食糜pH值基本上不受日龄和断奶的影响。哺乳仔猪从 18～ 3 6日龄胃蛋白酶相对活性 (U/ml胃液 )和比活 (U/mg蛋白质 )增加 10倍以上。不同断奶日龄仔猪各组在断奶后 12h胃蛋白酶的相对活性和比活均骤然升高 ,达到该日龄仔猪阶段正常值的 2倍左右 ,特别是小日龄断奶仔猪更为明显 ,随后在 3周内逐渐降低 ,至WT5BZ]This experiment studied the effect of weaning ages on pH and gastric pepsin activity in digestive tract.12 litters of new born piglets were divided randomly into four groups and was weaned at 17,21,28 and 35 days of age,respectively.3 piglets in each group was killed and samples of chyme and digesta from stomach,duodenum,jejunum and ileum were took at 12h,1week,2week,and 3week post weaning,respectively.The result showed that gastric chyme pH was higher at 12h post weaning than that of suckling piglets at the same days of age and was the highest during all the trial period.Then it decreased gradually.Restoring time of gastric pH to 3.5 were 3,2,1,1week(s) in group 1、2、3 and 4,respectively.Jejunum and ileum chyme pH had no change with days of age and weaning except that of duodenum.Relative and specific activity of pepsin increased more than 10 times from 18d to 36d in suckling piglets.Relative and specific activity of pepsin increased rapidly 12h post weaning and came to two times or so compared with suckling piglets at the same days of age.This change became significant with the earlier weaned piglets.It decreased gradually within 3 weeks and then remained low until 50d. [WT5HZ]

关 键 词：断奶日龄 食糜pH值 胃蛋白酶 仔猪 酶活性 

分 类 号：S828.5[农业科学—畜牧学]