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윤주용,방극승,김영길 ( J . Y . Yoon,K . S . Bang,Y . K . Kim ) 한국축산학회 1997 한국축산학회지 Vol.39 No.2
One hundred eight Hanwoo cows were evaluated ultrsonically for longissimus muscle depth and muscle width over the 13th rib before slaughter. Carcass measurement of muscle area, muscle depth and muscle width were also obtained. The correlation coefficient between muscle area and muscle depth were 0.78 while correlation coefficient between muscle area and muscle width was 0.51. A linear regression model to predict muscle area(y) by ultrasonic measured muscle depth(x) was developed as follows: y=15.2 + 7.17 x, (R²=0.44).
Pepsin - Cellulase 에 의한 국내산 주요 조사료의 DMD 에 관한 연구 2 . 두과 야초의 세포벽 구성물질과 건물소화율
김대진(D . J . Kim),김영길(Y . K . Kim),맹원재(W . J . Maeng) 한국축산학회 1989 한국축산학회지 Vol.31 No.6
The change of the chemical components and dry matter digestibilities of wild legumes(Cassia minosoides, Vicia angustifolia, Robinia pseudo acacia, Lespedeza bicolor, Pureria thunbergiana) grown in the mountainous area, Kyungsangnam-do province was determined by the advanced stage of maturity. Samples were dried at 70℃ for 24hr. and ground to pass a l-mm screen. Samples were subjected to the determination of the crude protein (N×6.25), crude ash, neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), and dry matter digestibility (DMD) by pepsin-cellulase technique. The energy values (total digestible nutrients, TDN; digestible energy, DE; metabolizable energy, ME) were calculated by DMD of pepsin-cell ulase technique. The results obtained were as follows: 1. The crude protein of wild legumes were ranged 17.49%∼25.74% and the crude protein had a tendency to decrease by advanced stage of maturity. 2. The crude ash of wild legumes were ranged 5.24%∼l0.l8% and the crude ash was not differentiated by advanced stage of maturity. 3. The NDF of wild legumes were ranged 51.94%∼58-97% and the NDF was increased by advanced stage of maturity (p $lt;0.05). 4. The ADF of wild legumes were ranged 30.64%∼39.95% and the ADF was increased by advanced stage of maturity (p$lt;0.05). 5. The ADL of wild legumes were ranged 7.24%∼14.63% and the ADL was increased by advanced stage of maturity (p$lt;0.05). 6. The DMD of wild legumes were ranged 44.48%∼61.80% and the DMD was decreased by advanced stage of maturity (p$lt;0.05). 7. The calculated energy (TDN, DE, and ME) values of wild legumes were decreased by advanced stage of maturity. 8. Regression equation and correlation coefficient of wild legumes between ADL(Y) and crude protein(X) were Y=-0.271X+15.626, and r=-0.559(p$lt;0.01), and of wild legumes between DMD(Y) and ADL(X) were Y=-2.494X+77.912 and r=-0.618(p$lt;0.01), respectively.
Pepsin - Cellulase 에 의한 국내산 주요 조사료의 DMD 에 관한 연구 1 . 화본과 야초의 세포벽 구성물질과 건물소화율
김대진(D . J . Kim),김영길(Y . K . Kim),맹원재(W . J . Maeng) 한국축산학회 1989 한국축산학회지 Vol.31 No.5
The change of the chemical components and dry matter digestibilities of wild grasses(Agropyron tsukushicense, Digitaria sanguinalis, Arundinella hirta, Miscanthus sinensis, Spodiopogon sibiricus, Setaria viridis and arex humlis) grown in the mountainous area, Kyunsangnam-do province was determined by advanced stage of maturity. Samples were dried at 701C for 24hrs. and ground to pass a 1-mm screen. Samples were subjected to the determination of the crude protein (N 6.25), crude ash, neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), and dry matter digestibility (DMD) by pepsin-cellulase technique. The energy values (total digestible nutrients, TDN; digestible energy, DE; metabolizable energy, ME) were calculated by DMD of pepsin-cellulase technique. The results obtained were as follows: 1. The crude protein of wild grasses were below 10% with the exception of the Digitaria sanguinalis and the crude protein had a tendency to decrease by advanced stage of maturity. 2. The crude ash of wild grasses were ranged 5.20%∼12.13% and the crude ash was not significantly different by advanced stage of maturity. 3. The NDF of wild grasses were ranged 58.66%∼79.55% and the NDF was increased by advanced stage of maturity(p $lt;0.05). 4. The ADF of wild grasses were ranged 33.04%∼45.74% and the ADF was increased by advanced stage of maturity(p $lt;0.05). 5. The ADL of wild grasses were ranged 3.35%∼8.33% and the ADL was increased by advanced stage of maturity(p $lt;0.05). 6. The DMD of wild grasses were ranged 36.15%∼64.14% and the DMD was decreased by advanced stage of maturity(p $lt;0.05). 7. The calculated energy (TDN, DE, and ME) values of wild grasses were decreased by advanced stage of maturity. 8. Regression equation and correlation coefficients of wild grasses between DMD(Y) and crude protein content (X) were Y=1.703X 27.953 and r=0.614(p $lt;0.01), respectively.
야초류 및 볏짚류의 detergent system 에 의한 사료가치평가
김영길,한인규,P . J . Van,Soest ( Y . K . Kim,I . K . Han,P . J . Van Soest ) 한국축산학회 1975 한국축산학회지 Vol.17 No.1
A total of 12 native grasses and rice straw grown in Ullung Island were analyzed to evaluate the nutritive values. Analyses included are cell-well constituents, acid-detergent fiber, permanganate lignin, cellulose, silica, in vitro true dry matter digestibility and cell wall digestibilities. Dystaenia takesimana was identified as good roughage source considering its CWC of 19.8% and high in vitro digestibilities. Ratio of hemicellulose to cellulose and of lignin to cellulose of native grasses were very characteristic taxanomically. Of two rice straws, Chin-heung appears to be better in nutritive value than Tong-il due to the silica content.