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거세우의 육성 비육시 조사료와 농후사료의 급여 비율이 비육 효율에 미치는 영향
김강식,김영길,배동호 ( Kang Shik Kim,Young Kil Kim,Dong Ho Bae ) 한국축산학회 1978 한국축산학회지 Vol.20 No.6
The experiment was conducted to study the effects of feeding different ratio of concentrate and roughage to growing-fattening Korean native steers with 1 S heads. The treatment were composed of 3 groups of T₁ (concentrate to roughage ratio, 80:20), T₂ (concentrate to roughage ratio, 70:30) and T₃ (concentrate to roughage ratio, 60:40). The results obtained were summarized as follows: 1. Average daily weight gain of T₁, T₂ and T₃ for period 1, period 2 and period 3 were 0.78, 0.84, 0.76; 0.92, 0.92, 0.93; and 0.83, 0.87, 0.78; respectively. The daily gain of T₂ group was significantly higher than that of T₃ group for total period. 2. The digestibility of crude protein and NFE of different groups showed little variation, however, and that of crude fiber decreased significantly as the ratio of concentrates increased for all 3 periods. 3. The daily TDN intake of T₁, T₂ and T₃ groups far total period were 5.15, 5.56 and 5.53 ㎏, respectively, indicating more consumption for T₂ group. 4. The TDN requirement of T₁, T₂ and T₃ groups for total period were 6.11, 6.35 and 6.48, respectively. 5. The dressing percentage and edible; parts percentage of T₁, T₂ and T₃ groups were 61.2, 51.0; 61.5, 50.0 and 58.9, 48.6, respectively, showing lower percentage for higher roughage group.
김강식,박용윤,차영호,정재혁,박홍석 ( K . S . Kim,Y . Y . Park,Y . H . Cha,J . H . Chung,H . S . Park ) 한국축산학회 1989 한국축산학회지 Vol.31 No.4
A digestion trial with four wether lambs and a feeding trial with sixteen Holstein cows of late lactation were conducted to evaluate nutritive value of soyhull and its feeding value to lactating cows. Digestibility of dry matter, crude protein and crude fiber were 78.0, 69.9 and 74.0%, respectively and total digestible nutrient content of soyhull was about 68.8%. When soyhull was included in dairy concentrates for replacement of the same amount of corn at the levels of 5.5, 11.0 and 16.5% of concentrates (fed about 7㎏ a day), milk production gradually decreased but milk fat content was increased. When milk production per unit concentrate or total feed consumed was calculated soyhull was as efficient as corn in providing energy for milk production but the energy content of soyhull was lower than that of corn, which caused slightly lower milk production in cows fed a limited amount of concentrates containing soyhull.
가축에 대한 볏짚 사료이용증진에 관한 연구 제3보 볏짚의 채식량과 소화율에 미치는 급여농후사료량과 질의 영향
김강식,이등임,구강훤일 ( Kang Shik Kim,Minoru Itoh,Kenichi Kameoka ) 한국축산학회 1976 한국축산학회지 Vol.18 No.3
In order to study the effects influencing the digestibility of crude fiber as an index for improving the consumption and availability of rice straw according to the quality and quantity of concentrate the feeding and digestion trial was carried out employing Japanese castrated goats at the grow ing stage. 1. Japanese native goats were fed 100g concentrate per day which contained 6.4, 11.7, 12.0 and 17.0% DCP in experiment 1. There were no significant difference in rice straw intakes of goats treated. However, the significant difference in digestibility of crude fiber (P$lt;0.05) was found. The digestibility of crude protein increased as the level of crude protein increased (P$lt;0.01). 2. The consumption of rice straw decreased according to increasing consumption of concentrate (P$lt;0.01) in experiment 2 designed for varying the supply of concentrate which contained 11.7 DCP in the levels of 500, 375, and 250g per day. The digestibility of nutrients except the crude fiber increased as the consumption of concentrate increased. However, the digestibility of crude fiber showed reverse effect compared to the nutrients (P$lt;0.01). 3. The multiple regression was studied between the dry matter digestibility and DCP intake, TDN intake, rice straw intake and DM intake: Y=40.1265+1.076TDN-0.472DCP-0.065RSIN* The multiple regression between the crude fiber digestibility and those above mentioned as follows: Y=26.7905-3.684TDN+38.316DCP**-0.138RSIN**+0.382DMIN. And that between digestibility of crude fiber and those were as follows: Y=38.886-4.356TDN**+26.545DCP**+0.0038RSIN-0.0297DMIN. 4. The linear regression between TDN consumption per ㎏ body weight and digestibility of crude fiber was established as follows: Y=68.33-1.142X The optimum TDN consumption per ㎏ body weight was estimated as 14g for digestion of crude fiber. 5. Between DCP consumption per ㎏ body weight and digestibility of crude fiber the following equation was found: Y=60.82-6.408N The optimum DCP consumption per ㎏ body weight eras found as 1.2g for digestion of crude fiber.
가축에 대한 볏짚사료이용 증진에 관한 연구 제4보 볏짚의 소화율을 지배하는 구조 탄수화물의 영향
김강식,아부량,굴정청,구강훤일 ( Kang Sik Kim,Akira Abe,Satoshi Horii,Kenichi Kameoka ) 한국축산학회 1976 한국축산학회지 Vol.18 No.3
In order to investigate the factors suppressing the digestibility of rice straw the study was carried out for searching the effects influencing the digestibility of structural carbohydrates in roughages. Employing Italian ryegrass, oat hay, rice straw and alkali treated rice straw as basic materials for neutral detergent fiber (NDF), in vivo digestion trial by goat, in vitro digestion study by unification of the nitrogen level, and the hydrolysis experiment with 5% sulfate solution were conducted. The experimental results obtained are as follows: 1. The crystalization rates of hexosan in experimental materials by dilute acid hydrolysis were very high, those in rice straw, Italian ryegrass and oat hays were similar each other and that is alkali-treated rice straw showed 6% more than those in the others. 2. The relationship between crystalization rate of hexosan (X) and L-cellulose content in structural carbohydrates (Y) showed the equation of X=1.365Y. 3. The crystalization rate by dilute acid hydrolysis, L-cellulose contents, and the other factors as the polymerization quality of structural carbohydrates did not affect the digestibility of roughages, however it was considered that those influenced the initial reaction rate. 4. The content of L-cellulose in rice straw was higher than those in the other hays. Especially the content of L-cellulose in alkali-treated rice straw was higher by nearly 7% than those in the others. 5. The high correlationship between in vivo NDF digestibility and NDF-lignin content in material and between the former and NDF-lignin+NDF-ash remained were recognized.
수확시기가 옥수수 Silage 의 품질 및 양분생산량에 미치는 영향
김강식,신정남,한흥전,권오홍 ( Kang Shik Kim,Chung Nam Shin,Heung Jeon Han,Oh Hong Kwon ) 한국축산학회 1976 한국축산학회지 Vol.18 No.3
To evaluate the digestible nutrients and feed quality of corn silage, corn plant was ensiled in small concrete silos at three stages of growth, viz milk-dough, dent-ripe, and ripe stage. Determining the digestibility, acidity and organic acids with the silages, obtained results as follows. 1. The yields of dry matter per 10a were 1,273㎏ at milk-dough stage, 1,854㎏ at dent-ripe stage, and 1,678㎏ at ripe stage, respectively. 2. the quality of all the silages were excellent and pH value of them were ideal. 3. The TDN contents on dry matter basis of the silages were 60.02, 61.87 and 59.80% at milk-dough, dent-ripe and ripe stage, respectively. 4. The yields of TDB per 10a were 742, 1,147 and 1,003㎏ at milk-dough, dent-ripe and ripe stage, respectively.