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홍병주,이영철 ( B . J . Hong,Y . C . Rhee ) 한국축산학회 1974 한국축산학회지 Vol.16 No.1
Two experiments were carried out to determine the effect of supplementing chicken diets with various non-protein nitrogen compounds as a partial substitute for the protein, and to know the amount of nitrogen absorbed from various segments of the small intestine when the birds fed NPN supplemented diets. The results obtained are summarized as follows: 1. When the chicks were fed low protein diets containing various NPN sources, certain ammonium nitrogen such as urea, diammonium citrate and triammonium phosphate can be utilized well by growing chicks up to the level of 2% protein equivalent. 2. The effectiveness of a nitrogenous compound as a nitrogen source for the chick depends on its ability to supply NH₂ groups and may be varied according to its kind, palatability, solubility, pH and toxicity of the ammonia yielding compound. Some of the NPN (Monoammonium phosphate, ammonium oxalate and ammonium bicarbonate) brought out the growth depression on the chick. 3. Plasma ammonia and uric acid concentrations increased in general when the birds fed NPN supplemented diets. Especially, plasma ammonia and uric acid values increased markedly when birds were fed the diets containing diammonium citrate and diammonium phosphote. 4. In the 5-week-old chicks, when diammonium citrate and urea were fed to supply 2% protein equivalent in a high protein diets which met all the essential amino acid requirements, urea supplemented diets improved growth rate. On the other hand, diammonium citrate supplemented diets decreased growth rate compared to the same diet without NPN source. 5. Most of nitrogen ingested disappeared in the upper jejunum. Presumably, when the birds fed diets containing NPN supplements gave poor growth rate, the nitrogen absorption was depressed, too.
홍병주,이영철 ( B . J . Hong,Y . C . Rhee ) 한국축산학회 1973 한국축산학회지 Vol.15 No.3
This experiment was conducted to compare the effects of antibiotic additives(baciferm, aurofac, SMS and terramycin 3+3) on body weight gain and some lymphoid tissues of broiler chicks. The results obtained were summarized as follows: 1. All of the antibiotic additive treatments showed higher weight gain(1.5-8%) than that of control, but the growth rate was varied according to the kind of antibiotics. 2. When antibiotics were added, the weight of adrenal, bursa of fabricius, spleen, colon and pancreas were heavier than those of antibiotic free treatment.
Recombinant Bovine Somatotropin 장기간 투여가 젖소의 산유반응에 미치는 영향
홍병주(B . J . Hong),정준(J . Jeong),성경일(K . I . Sung),여인서(I . S . Yuh),김종복(J . B . Kim),장병선(B . S . Chang),송지용(J . Y . Song) 한국축산학회 1993 한국축산학회지 Vol.35 No.2
The effects of recombinant bovine somatotropin(rBST) on various responses of dairy cows were extensively investigated for a 270-day long experiment. Thirty two lactating Holstein cows were randomly assigned to the three levels of rBST treated groups (12.5㎎/h/d, 25.0㎎/h/d, and 500㎎/h/14d) and the non-treated control. Dairy properties investigated were: 1) the milk yield and composition; 2) blood metabolites; 3) levels of insulin like growth factor-1 (IGF-1) and BST in milk and serum; 4) health and reproductive characteristics; and 5) economical profitability. Milk yield and 4% fat corrected milk(4% FCM) yield were significantly increased in the rBST treated groups in comparison with control. The group treated with 25㎎/h/d showed an improvement in 4% FCM yield over the other two treated groups. The similar results were also obtained in the analyses for the milk components(protein, fat, lactose and SNF). The number of somatic cell count (SCC) was substantially decreased in the 25.0㎎ rBST treated group than the other groups. For each of early, middle, and late lactation stages, the influence of rBST treated groups were not noticable in the early lactation but were very remarkable in the middle and late lactation. rBST treated cows showed effects in increasing levels of glucose and triglyceride in blood, and moderatly increased IGF-1 and BST in serum, however, did not affect those in milk. Metabolic disorders, mastitis, and reproductive performance were not affected by rBST treatment. The differences of monetary return with and without treatment of rBST was of great significance.
Recombinant Bovine Somatotropin 투여가 한우의 성장 및 도체품질에 미치는 영향
홍병주(B . J . Hong),정지원(J . W . Jeong),성경일(K . I . Sung),여인서(I . S . Yuh),김종복(J . B . Kim),이병건(B . G . Rhee),장병선(B . S . Chang) 한국축산학회 1993 한국축산학회지 Vol.35 No.2
The effects of recombinant bovine somatotropin(rBST) on various characteristics of Korean native cattle were investigated to maximize increasing of meat productivity and economical profits. Twelve growing Korean native bulls were randomly assigned to rBST treatments of 0, 15㎎/d and 30㎎/d, per head for the period of 193-day long trial, and another 90-day long trial was followed by with four growing bulls to investigate the effect of rBST on carcass quality. The characteristics of interest were body gain, feed intake, body conformation measurements, carcass grades and economical traits. Average daily gain of rBST treated bull was increased by 11% compared with control. Feed intake did not affected by rBST administration, but feed effiency was improved by 7-14% to that of control due to daily body gain effect. rBST treated bulls were also increased body length, chest width, chest depth, chest girth and shank circumference. Back fat thickness and intermuscular fat content were decreased, and rib-eye area and meat production index value were increased when the bull was treated with rBST. Thus, the overall carcass quality was graded up in some extent and the economical profits were also elevated. The expected economic gain per bull by rBST treatment reaches 333,389 to 352,925 won.
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.
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.
한우도체의 부분육 수율에 영향을 미치는 성 , 도체중 및 도체평가 형질들의 효과
이재윤,김종복,신종서,양부근,홍병주 ( J . Y . Lee,J . B . Kim,J . S . Shin,B . K . Yang,B . J . Hong ) 한국축산학회 1997 한국축산학회지 Vol.39 No.2
The data of 550 beef tattles collected after grading in Seoul Whole Sale Market, NLCF from September, 1995 to March, 1996 were analyzed to estimate effects of sex, carcass weight and some carcass traits on retailed cut percentage. Correlation between lean and supreme meat percentages was 0.741 and correlation between lean and top grade meat percentages was 0.939. For steers, lean meat, bone, supreme meat, and top grade meat percentages were 65.31, 12.80, 15.15, and 37.74%, respectively, which were lower than those of bull which were 67.27, 13.09, 16.09 and 12.41%, respectively. However, fat percentage of 21.88% and rib percentage of 12.41% were higher than those of bulls which were 19.41 and 12.06%, respectively. In cow, bone percentage of 12.30% was low but ratio of muscle to bone of 1.84 was high. The grade 1 of meat quality obtained higher fat yield and ratio of fat to bone than the grade 2 and 3 of meat quality. The grade A of meat yield obtained higher lean meat percentage, top grade meat percentage, ratio of muscle to bone, and ratio of muscle to fat which were respectively 67.03, 39.09, 5.26 and 3.56% than the grade B and C of meat yield.