이년계 ( 二年鷄 )에 있어서 각종 Hormone 및 임부요 ( 姙婦尿 )의 처리가 산란 및 육생산에 미치는 영향에 관한 연구 = Effects of Treatment on the Various Hormone and Pregnant Women 's Urine upon the Egg Laying and Meat Production of Two - Year - Old Hens

다국어 초록 (Multilingual Abstract)

This experiment was conducted to investigate the effects of treatment of various hormonal substance upon the egg laying, meat production and meat quality of two-year-old hens. 1. Effect of various hormone substances treatment on egg laying. 1) The rate of laying was significantly changed by the administration of various hormone substances ( P$lt;0.05) The laying rate of pregnant women`s urine and PM S treated group, but that of progesterone, thyroxine and Tapazol treated-group was decreased compared to the control group. 2) No significant difference in the egg weight among each treated groups was recognized. 3) S tuck on ovary 1㎝ in diameter, changed propotionally with the rate of laying and a significant difference among treated groups was recognized. 2. Effect of various gormone substances treatment on meat production and quality. 1) A significant change of body weight according to dosing with various hormone substances amonagn comparison groups, is recognised from 10 weeks after treatment, but only troxine treated group lose weight and are inferior, whereas other groups are heavier, compared with the control group, but its variation is very little. 2) A significant difference (p$lt;0.05) in carcass weight among the treated groups was recognized and the carcass weight of 5 treated-groups except thyroxin and progesterone treated-group was significantly higher than that of the control group. 3) The carcass percentage of PMS and Tapazol treated-group was significantly higher than that of the control group and there are no significant differences between the other groups and control group. 4) There was little difference of water extractives and ash content in meat component of 8 treated-groups. The crude protein of meat. was decreased a little in thyroxine and Tapazol treated-group while that of meat in estrogen, PMS and progesterone treated-group was increased a little. The crude fat contant was particularly increased in Tapazol treated-group and in the other groups it was similar to that of the control group. 3. Effect of various hormone substances treatment on the each organs. 1) A significant difference (p (0.05) in the total weigh of internal organs treated-groups was recognized. The total weight of internal organs in Tapazol and PMS treated-groups was heavier than in the control group. It is remarkably light in thyroxine treated groups. 2) There were some differences among the weight of gizzard fat and small intestine in 8 treated groups, but the changes in various organs weights were comparatively similar to those in total weight of internal organs. 3) The weight of liver, heart, pancreas and gizzard appeared generally to be in proportion to the body weight. 4) The weight of content was increased remarkably in estrogen treated-group and decreased in progesterone groups. A significant difference (p$lt;0.0.5) among the treated-groups was recognized. 5) A significant difference (p$lt;0.05) in the weight of a reproductive duct among treated-groups was recognized. The weight decreases remarkably in progesterone and Tapazol treated-groups and in the other groups it is little different from in the control group and generally tends to vary as an laying rate.