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재조합 소 성장호르몬 투여가 젖소의 혈액성분 , 건강 및 안정성에 미치는 영향
신종서(J . S . Shin),심태수(T . S . Sim),김종복(J . B . Kim),장병선(B . S . Chang),홍병주(B . J . Hong) 한국축산학회 1996 한국축산학회지 Vol.38 No.4
The effects of newly developed sustained release recombinant bovine somatotropin(SR-rBST) on blood metabolites, concentration of blood BST, concentration of milk BST, health problems and reproductive characteristics of lactating dairy cows were examined. Forty eight holstein cows were randomly assigned to the four levels of non-treated control and SR-rBST treated groups(25㎎/d/head, 300㎎/14d/head, 500㎎/14d/head). The results obtained are summarized as follows: The SR-rBST treated cows showed increased levels of calcium, glucose, creatinine, urea in blood compared with control cows. Circular concentration of blood BST was significantly increased in the treated groups in comparison with control group. Circular concentration of milk BST was not different between the treated groups and the non-treated group. The health problems and reproductive characteristics were not affected by SR-rBST treatment. These results indicate that the newly developed SR-rBST administration to the dairy cow did not influence blood metabolites, concentration of milk BST, health probems and reproductive performances.
Ionophores 의 급여가 홀스타인 비거세우의 비육능력에 미치는 영향
신종서 ( J S Shin ),고용균 ( Y G Goh ),홍병주 ( B J Hong ) 한국축산학회 1995 한국축산학회지 Vol.37 No.6
This study was carried out to evaluate and compare the effect of feeding antibiotics on growth performance and rumen characteristics of Holstein bulls. The antibiotics used in this experiment were monensin and lasalocid as ionophores and bambermycin. The results obtained were summarized as follows: 1. The average daily gain of bulls fed antibiotics was increased by 2.4∼7.9% compared with control(P$lt;.05). Dry matter intake of bulls moderatery decreased with the addition of antibiotics except in C treatment (bambermycin group). 2. The feed efficiencies of bulls fed antibiotics were increased by 6.1∼6.7% compared with the control. 3. Digestible crude protein and total digestible nutrient requirements per ㎏ body weight gain decreased 6.07.8% by the addition of antibiotics. 4. Contents of total volatile fatty acid and propionate in the rumen were higher in bulls fed antiobiotics than in control. The acetate/propionate ratio of bulls fed antibiotics decreased compared with control. 5. Numbers of E. coil colony units in feces decreased with addition of antibiotics.
반추동물용 섬유질 배합사료(TMR)의 사료 제도, 품질 및 안전성에 대한 인식 및 실태 조사
신종서 ( J S Shin ),송영한 ( Y H Song ),최염순 ( Y S Choi ),안준상 ( J S An ),김희걸 ( X J Jin ),이종인 ( J I Lee ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2015 강원 농업생명환경연구 Vol.27 No.3
This study was performed to investigate the feed production policies and production status and perception. The survey was conducted by E-mail about 20 companies of total 138 TMR feed companies in Korea. Korean feed industry has maintained a significant level of production and quality through continuous development and advanced. And feed production facilities are also equipped with a certain level of technology. However, most of the material is dependent on imports. Therefore, in order to develop a sustainable feed industry, we should proceeding to secure reliable sources about fodder resources. In order to maintain the food quality, the role of the import feed inspector is more important. The government``s various efforts are necessary for the imported feed test agencies to improve the reliablity and satisfaction and forge a feed management system.
재조합 소 성장호르몬 투여수준이 한우 및 홀스타인 비육우의 육성성적에 미치는 영향
정준(J . Jeong),신종서(J . S . Shin),엄창국(C . G . Yan),장병선(B . S . Chang),홍병주(B . J . Hong) 한국축산학회 1996 한국축산학회지 Vol.38 No.4
This study was performed at the private Hanwoo farm, Hongcheon-gun in Kangwon-do with thirty two Hanwoo bulls and at the Samyang Taekwanryeong farm in Kangwon-do with forty Holstein bulls. They were assigned to completely randomized block design with alloting control and three doses of sustained release recombinant bovine somatotropin(SR-rBST), 0.03㎎/㎏ body weight (BWy14d(0.03mg group), 0.06㎎/㎏ BW/14d(0.06㎎ group) and 0.09㎎/㎏ BW/14d(0.09㎎ group). SR-rBST was administered biweekly and doses of SR-rBST were adjusted monthly according to BW increase. Initial average BWs of Hanwoo and Holstein bulls were 430㎏ and 334㎏, respectively. The purpose of experiment was to examine the effect of SR-rBST on growth and body conformation rate. The results are summarized as follows ; Average daily gains(ADG) of control, 0.03㎎, 0.06㎎ and 0.09㎎ groups were 1.02㎏, 1.18㎏, 1.11㎏ and 1.08㎏, respectively, for the experimental period in Hanwoo bulls. Administration of SR-rBST 0.03㎎/㎏ BW/14d, 0.06㎎/㎏ BW/14d and 0.09㎎/㎏ BW/14d moderately increased ADG by 15.7%, 8.1%o and 5.9%, to that of control group. Daily dry mater intakes were not different among treatments. These results indicate that SRrBST treatments tended to increase feed efficiency(FE). In ten items of body conformation measurements, SRrBST administration significantly increased withers height and chest width in comparison with control(P$lt;0.05) and 0.09㎎ group was more effective than other groups in Hanwoo. SR-rBSTs increased ADG in Hanwoo bulls by 4th month(average BW of 550㎏) after SR-rBST injection, however, ADGs at 5th and 6th month, at finishing period, were slightly decreased over control within monthes. In otherwise, ADGs of control, 0.03㎏, 0.06㎏ and 0.09㎏ groups in Holstein bulls were 1.20㎏, 1.28㎏, 1.16㎏ and 1.20㎏, and no statistical significances were found among treatments. However, ADG of 0.03㎏ group tended to be increased only 6.7%. SR-rBST treatments tended to increase body length, chest girth, chest width and ramp length in Holstein bulls. ADGs of 0.03㎏, 0.06㎏ and 0.09㎏ groups were decreased in comparison with control at lst and 2nd month after SR-rBST ingection, however, ADGs of those groups were increased at 3rd and 4th month(belong to fattening period) after SR-rBST injection. These results indicate that administration of 0.03㎎/㎏ BW/14d of SR-rBST increase meat productivity by increasing of ADG, FE and body conformation in fattening period.