Organ Growth and Digestive Enzyme Levels to Fifteen Days of Age in Lines of Chickens Differing in Body Weight

摘要: Abstract Weights of internal organs and levels digestive enzymes were obtained through the first 15 days posthatch for cockerels from three lines chickens known to differ greatly in body weight. On Day weights fastest growing line eight times greater than those slowest line. Differences among found at hatching growth patterns (both absolute relative weight) vitellinee residue, heart, lungs, liver, pancreas, crop, proventriculus, gizzard, segments small intestine. Line differences also evident trypsin, chymotrypsin, amylase pancreas contents Ranking these traits varied with age. In all intestine, increased relatively more did total weight during 1st wk posthatch, after which relationship reversed.