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홍병주,이해종,이영철 ( Byung J . Hong,Hae J . Rhee,Young C . Rhee ) 한국축산학회 1975 한국축산학회지 Vol.17 No.4
A series of experiments was carried out to determine the effects of supplementing acorn as a chicken feed ingredient on the chick growth, feed efficiency, nitrogen retention and metabolizable energy value. The results obtained were summarized as follows: 1. At a level of 1% supplementation to growing chick ration, tannins depressed the growth of chicks and their feed consumption, but the inclusion of methionine and choline partially alleviated the toxic effects. 2. Diet containing 2% tannin was toxic and caused depressed body weight, decrease in egg production, egg weight, Haugh units and feed consumption, but reduction in body weight and egg production were prevented to some extent by the addition of methionine and choline to the diet. 3. In the nutritionally balanced starter diets, the addition of raw acorn up to the level of 10% may replace equivalent amount of corn without adverse effect. 4. Raw acorn reduced the grow th rate of starter chicks remarkably and those treatments of water, heat and alkali improved the growth rate to some degree. Nitrogen retention were decreased when the birds fed acorn containing diets. The water soaked acorn gave the highest ME value among all the processing methods. 5. Tannin content of acorn was decreased markedly by water soaking.
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.
인삼 Saponin 이 닭이 성장 및 번식능력에 미치는 영향
홍병주,김정익,김우호,이영철 ( Beong Ju Hong,Chung Ik Kim,Uh Ho Kim,Young Chul Rhee ) 한국축산학회 1976 한국축산학회지 Vol.18 No.5
This experiment was carried out to determine the effect of feeding Ginseng Crude Saponin (GCS) on the body weight gain and reproductive performance of click under normal and stressed circumstance. The GCS was administered to chicks orally in the amount of 4㎎, 20㎎ and 100㎎ per ㎏ body weight contineously for seven weeks. In Pilch cockerel trial, GCS was fed in the amount of 25㎎ and 100㎎ per ㎏ body weight for four weeks (from 18th wks. of age to 22th wks.) under the restricted feeding condition. The results obtained were summarized as follows: 1. No significant differences were found in body weight gain, feed efficiency and retention of nutrients such as protein, fat and energy among the treatments. 2. No moticeable difference was observed in organ weight such as liver, adrenal, bursa of fabricius, spleen and pancreas. However, the weight of bursa of fabricius and spieen which is known to produce plasma cell were appeared to decreased in the group received stress by means of inoculating Salmonella pullorum. 3. Total cholesterol content of serum and liver tissue were found to decrease with the administration of GCS, the cholesterol. content showed apparent reduction in the group received the stress comparing the normal group. 4. Pilch cockeral group which was administered the GCS ire the amount of 50㎎ and 100㎎ were found to increase the width and length of testis and 100㎎ of GCS administration group was observed to increase the weight of testis comparing the control group, but there were no significant difference among the treatments. Diameter of seminiferous table value appeared the highest size in the group of 100㎎ GCS administration in comparison with other treatments(p$lt;0.01).
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.
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.
저질산야초의 (低質山野草) 사료가치 증진시험 Ⅰ. 재료의 수분함량과 암모니아 첨가수준이 일반성분 및 건물소화율에 미치는 영향
홍병주(Byung Ju Hong),고용균(Yong Gyun Goh),이영철(Yong Chull Rhee) 한국축산학회 1984 한국축산학회지 Vol.26 No.3
This study was conducted to evaluate the nutritive value of wild grass treated with ammonia and to determine the effects of ammonia application rate, grass moisture content, treatment duration and ammoniation source on the chemical composition and fiber digestibility. The results obtained were summarized as follows: 1. The concentration of total nitrogen of wild grass treated with ammonia was increased with increasing the NH₃ application rate and moisture content of wild grass (P$lt;0.01). But, the nitrogen of urea-treated grass was not affected by the moisture content proportionately. 2. The NDF and ADF content of wild grass treated NH₃ and urea were not affected by the moisture content and application rate 3. Although the urea-treated grass was not higher in the in vitro dry matter digestibility (IVDMD) than untreated. But, the ammoniation grass significantly improved the IVDMD at the level of 3.0% especially. Also, significant increases were obtained at the level of 5,7% (P $lt; 0.01). 4. In vitro dry matter digestibility (IVDMD) was greatly affected by the treatment duration. More than 3 weeks in treatment duration showed significantly (P$lt;0.01) higher in vitro dry matter digestibility (IVDMD) compared to one week duration. And no significant difference among more than 3 weeks duration were observed. 5. The 30% moisture content in NH₃ grass showed highest IVDMD.
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.