GROWTH AND DEVELOPMENT OF THE DIGESTIVE ORGANS AND SOME ENZYMES IN BROILER CHICKS AFTER HATCHING
GROWTH AND DEVELOPMENT OF THE DIGESTIVE ORGANS AND SOME ENZYMES IN BROILER CHICKS AFTER HATCHING
复制标题
DOI：
10.1080/00071669108417376
复制
发表时间：
1991-07-01
影响因子：
2
通讯作者：
NIR, I
中科院分区：
文献类型：
--
作者：
NITSAN, Z;BENAVRAHAM, G;NIR, I
1.测定孵化至23天龄的体重、消化器官重量和部分消化酶活性。2．相对日生长率在11天龄时达到峰值（22%增益/天），之后逐渐下降。3．卵黄残留量从孵化时的4.6克快速下降到4天后可以忽略不计的值。4．胰腺和小肠的最大异速生长是机体的4倍，肝脏的最大异速生长是机体的2倍。5．胰腺和肠道内容物中测量的消化酶活性（单位/千克体重）随着年龄的增长而增加。在胰腺中，淀粉酶和脂肪酶在第8天达到最大值，胰蛋白酶和糜蛋白酶在第11天达到最大值。在小肠中，脂肪酶在第4天达到最大值，胰蛋白酶和胰凝乳蛋白酶在第11天达到最大值，淀粉酶在第17天达到最大值。6．孵化后的雏鸡消化酶分泌的发展可能是消化以及随后食物摄入和生长的限制因素。
1. Body weight and the weight of the digestive organs and activities of some digestive enzymes were determined from hatching to 23 d of age.2. Relative daily growth rate peaked at 11 d of age (22% gain/d) and then decreased gradually.3. The vitelline residue was decreased rapidly from 4.6 g at hatching to negligible values from 4 d of age.4. Maximal allometric growth of the pancreas and small intestine was 4-fold and that of liver 2-fold greater than that of the body.5. Activities (units/kg body weight) of the digestive enzymes measured in the pancreas and intestinal contents increased with age. In the pancreas maximal values were attained on day 8 for amylase and lipase and 11 for trypsin and chymotrypsin. In the small intestine maxima were attained on day 4 for lipase, 11 for trypsin and chymotrypsin and 17 for amylase.6. The development of secretion of digestive enzymes in the post-hatched chick could be a limiting factor in digestion and subsequently in food intake and growth.