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사료급여방법이 제주재래마의 체성장 및 도체품질에 미치는 영향
오운용(W . Y . Oh),강태홍(T . H . Kang),김동철(D . C . Kim),진신흠(S . H . Jin),홍성귀(S . K . Hong),양승주(S . J . Yang),정재홍(J . H . Jung) 한국축산학회 1993 한국축산학회지 Vol.35 No.6
Nine Cheju Native Horses with an average weight of 169.2㎏ were used in a 238-d (34-wk) fattening trial designed to evaluate the effects of feeding method on growth performance and carcass characteristics. Horses were randomly alloted to three treatment groups: T₁ 6-wk (Former fattening period: FFP) + 28-wk (Latter fattening period: LFP), T₂, 9-wk (FFP) + 25-wk (LFP), T₃, 12-wk (FFP) + 22-wk (LFP). During the FFP, concentrate was restricted at approximately l.5% of their body weights but horses were allowed ad libitum access to concentrate during the subsequent LFP. The horses were individually penned in 2.5-m×3-m pipe stalls with front feeding gates. They were allowed 3 h of exercise in a pen (50-m×30-m) outside the barn monthly. Horses were weighed at 30-d intervals and feed consumption was measured daily. At the end of the 238-d fattening period, one horse in each treatment was selected randomly and slaughtered for meat quality evaluation. Results obtained from the present study were summarized as follows; during the overall fattening period, average daily gains (ADG) and nutrient intake (TDN) per ㎏ wt, gain were 0.59, 5.10(T₁), 0.51, 5.84(T₂) and 0.43, 6.37㎏(T₂), respectively. When horses were allowed ad libitum access to concentrate for 28 wk(T₁), ADG and feed efficiency(TDN) were improved by 37%(P$gt;.05) and20%(P$gt;.05)compared to those allowed concentrate free choice for 22 wk(T₃). Horse in T, group had an improved dressing percentage and carcass weight with good quality grades(intramuscular fat, meat color, fat color). Taste panelists(150 amateures) detected no difference from longissimus lumborum steaks between Cheju Native Horse and improved Cheju Native Cattle, but found juiciness and meat flavor were superior to those of beef.
볏짚 사일리지 제조시험 제1보 청예호맥 첨가에 의한 사일리지 제조
강태홍,차영호,장윤환 ( T . H . Kang,Y . H . Chah,Y . H . Chiang ) 한국축산학회 1980 한국축산학회지 Vol.22 No.6
This experiment was carried out to investigate the possibility of rice and rye silage (RSRS); Rice straw (Akkibare) was harvested last fall and filed-stagged last winter (5-6 months), and green chopped (4-5㎝) rye was used at full- stages and the mixing ratio of rice straw and greencut rye was 1:1, 1:3 and another 1:3 (rice straw was treated 4% NaOH sol.) by raw materials weight bases. 0.3% urea solution were added to each treatments for supplement of nitrogen. These silages were evaluated after 200 days storage and the results were as follows: 1. The quality of silages was $quot;very bad$quot;, evaluated by organic acids contents proposed by Flieg; Butyric acid was more than 60% of total acids and lactic acid was comparatively low. 2. But RSRS intake by sheep was comparatively high during the digestion trials, which might be considered as roughage feeds for animals. And also the color and acidic odor was not bad in appearance. 3. It was noticed that the 4% NaOH treatments of rice straw couldn`t be used to improve the nutritive value of RSRS, but the digestibility of nutrients, except crude protein, was slightly improved. 4. The mixing ratio of rice straw and green-cut rye could be recommended by 1:1, because the quality of RSRS was not different between two treatments (1:1, 1:3). In conclusion, RSRS can be used as roughage feeds for animals, whist, will be one of the methods for maximizing the utilizability of rice straw and it may be considerable to use earlier stale green-cut rye than full-heading stage for improving the quality of RSRS.
NaOh 처리 볏짚 급여시 축우의 성장능력 및 생리적 상태에 미치는 효과
강태홍,이상철,탁태영,김강식,황의경 ( T . H . Kang,S . C . Lee,T . Y . Thak,K . S . Kim,I . K . Hwang ) 한국축산학회 1985 한국축산학회지 Vol.27 No.7
This experiment was conducted to confirm the effect of sodium hydroxide spray treatment and to know whether the physiological changes occur, when spray treated rice straw was fed to cattle during long-term period. Fifteen male Holstein cattle weighing about 200 ㎏ were randomly assigned to three treatments (untreated, 5% NaOH and 10% NaOH treated), Daily weight gain was slightly but not significantly increased by the 5% sodium hydrorcide treatment, bur decreased by the 10% sodium hydroxide treatment. Feed utilizations were improved by the sodium hydroxide treatments and it would be explained by the reduced daily DM intake. Serum Na and K levels were not increased by either 5% or 10% sodium hydroxide treatments of rice straw, There were no consistent or significant changes in the serum concentrations of other minerals betwesn untreated and sodium hydroxide-treated rice straw fed groups. Although plasma bicarbonate concentrations were elevated by the sodium hydroxide treatment, metabolic alkalosis was unlikely to be generated. Total VFA concentrations in the rumens were slightly increased but not significantly different by the sodium hydroxide treatments.
강태홍,탁태영 ( T . H . Kang,T . Y . Thak ) 한국축산학회 1981 한국축산학회지 Vol.23 No.1
Twenty non-pregnant and over 8 years old Korean native cow were used in studying the effects of fattening performance with different fattening duration. Offered fattening duration were 40,60,90 and 120 day. The results obtained are summarized as follows; 1. A significant difference (P$lt;.05) was observed among the fattening lengths. The 40day duration resulted in the most effective fattening performance as 1.193 ㎏ daily body weight gain among treatments. 2. There appeared a significant difference (P$lt;.01) in feed efficiency among treatments except between 90 and 120 days of fattening duration. 3. Non significant difference (P$gt;.05) was observed in dressing percentage among fattening durations. The dressing percentage of 40, 60, 90 and 120 days period were 57.6, 59.4, 58.9 and 57.9, respectively. 4. Net income per head per day was higher in 40, and 60 days of short period fattening-compared with 90 and 120 days. In the total net income, however, resulted in higher at the 6o and 90 days. 5. Consequently, the 40 to 60 days short fattening period might be recommended in fattening duration for the old Korean Native cow.
부로일러 사료에 대한 항생물질제조 부산물 ( Ugifac ) 의 사료적가치에 관한 연구
강태홍,박용윤,최진호,정인걸 ( T . H . Kang,Y . Y . Park,J . H . Choi,I . K . Chung ) 한국축산학회 1980 한국축산학회지 Vol.22 No.4
This experiment was carried nut to investigate the nutritive value of antibiotic fermentation by-product (Ugifac) for broiler diets, 270 birds of Hybro male chicks were divided into 6 groups, which were the substitution level by Ugifac 0, 1, 2, 3, 4, 5% for 8 weeks. The results obtained were as follows; 1. Ugifac contains 68.60% C. Ash, 17.32% C. Protein, and 0.67㎎/g of kanamycin. 2. By increasing the levels of Ugifac, it was tended to increase body weight gain and the amounts of feed consumption. 4% levels of Ugifac was better than any other treatments in terms of feed efficiency and economics. 3. There was no evidence of antibiotics retention on muscle and liver of chicks although Ugifac was supplemented till 5%. In conclusion Ugifac can be used within the 4%. levels for broiler diets efficiently without antibiotics retention problems, although the chemical composition of Ugifac was relatively low in quality.
강태홍,최용규,차영호 ( T . H . Kang,Y . K . Choe,Y . H . Cha ) 한국축산학회 1985 한국축산학회지 Vol.27 No.1
The metabolic study using poultry were carried out to obtain the nitrogen corrected metabolizable energy (MEn) value of the feedstuffs $quot;the Composition of Korean Feedstuffs$quot; published in 1981. The results obtained are as follows; It was found that MEn of wheat bran and rice bran were higher than that of NRC (1977) and Japanese Feed Composition (1975), respectively. MEn of rapeseed meal imported from Canada was higher than that of Yeong San and Yudal, but lower than that of NRC (1977), MEn of sesame meal was inferior to that Composition of Korean Feedstuffs (1981) and Japanese Feed Composition (1975), respectively. It was also shown that MEn of corn gluten meal was slightly higher than that of the composition of the Korean Feedstuffs.
강태홍,안종남,차영호 ( T . H . Kang,J . N . An,Y . H . Cha ) 한국축산학회 1985 한국축산학회지 Vol.27 No.1
The digestible experiments using swine were carried out to make up $quot;the Composition of Korean Feedstuffs$quot; published in 1981. The results obtained are as follows; DCP and DE value of wheat shorts were slightly higher than those of the Composition of Korean Feedstuffs (1981). TDN value, however, was lower resulting from low crude fiber digestibility. DE value of naked milled barley and milled barley were superior to that of the Composition of Korean Feedstuffs (1981) and NRC (1979), respectively. Campared between species of rapeseed meal, DCP and TDN value of Yeong San were higher than those of Yudal. It was also found that nutrient digestibilities, DCP, and TDN of alfalfa pellet was lower than those of the Composition of Korean Feedstuffs (1981).
볏짚 싸이레지 제조시험 제2보 . 농산부산물 첨가에 의한 싸이레지 제조시험
강태홍,차영호,배동호,장윤환 ( T . H . Kang,Y . H . Chah,D . H . Bae,Y . H . Chiang ) 한국축산학회 1981 한국축산학회지 Vol.23 No.2
This study was carried cut to determine the quality and nutritive value of rice straw silage by supplementing urea, molasses, radish-top, sweet potatoes (SP), and SP pulp. Six different rice straw silages were made :(1) only rice straw, (2) 8% supplemented molasses, (3) 75% supplemented fresh radish top, (4) 90% supplemented fresh radish-top, (5) 50% supplemented SP, and (6) 50% supplemented SP pulp. All silages except only rice straw were added with urea at 0.3% of rice straw. A chemical analysis and digestion trials were conducted. The results obtained were as Follows 1. By supplementing wastes or by-products, in general, the neutral deterrent contents in silages decreased. 2. The quality of silages were also improved, of which evaluation score was between excellent and good. 3. It appeared that mold occurrence can be reduced by supplementing radishtop, SP, and SP pulp to the rice straw. 4. In digestion trial, the digestibility of crude protein, crude fiber and NFE were increased by supplementing those materials. 5. DCP and TDN contents in all supplemented silages were increased.