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거세한우에 대한 제한급여 수준과 출하체중이 비육능력 및 육질에 미치는 효과
홍성구(S . K . Hong),백봉현(B . H . Baek),강희설(H . S . Kang),조원모(W . M . Cho) 한국축산학회 1996 한국축산학회지 Vol.38 No.3
A study was conducted with 63 Hanwoo steers weighing 120㎏ to investigate the effect of restricted feeding (Restricted feeding I, feeding concentrates at the levels of 1.0% and 1.5% of live body weight during growing stage and finisher stage I, respectively; Restricted feeding B, feeding concentrates at the levels of 1.5% and 2.0% of live body weight during growing stage and finisher stage I, respectively) and market weights(550, 600 or 650㎏) for 600 days on carcass composition, and quality and yield traits of Hanwoo steers. Results observed from the study were summarized as follows : Level of feeding the concentrates influenced body weight by age and daily gain for every growing stage, this results were due to the difference between reduced growth rate of cattle fed ad libitum during finisher stage II and rapidly increased growth rate of cattle raised by Restricted feeding I during same period(P$lt;.0001). An improved body weight by feeding ad libitum increased(P$lt;.0045) dressing percentage while decreased(P$lt;.0049) retailed cuts(%) between feeding ad libitum and Restricted feeding I. No differences, however, in retailed cuts(%) and body fat(%) were observed between Restricted feedings. Degree of marbling of Longissimus muscle tended to improve as body weight of greater than 600㎏ increased, but the difference(P$lt;.0014) was observed only between feeding ad libitum and Restricted feeding I. However, high grade of beef quality was observed from the steers heavier than 550㎏. The size of Longissimus muscle increased(P$lt;.0011) with body weight, but was not influenced by the level of feeding. Backfat thickness was also affected by body weight, and this was mainly due to the difference(P$lt;.0366) between feeding ad libitum and restricted feedings. But no tendency was observed between Restricted feeding I and Restricted feeding II. Moisture content(%) of Longissimus muscle was decreased(P$lt;.0267) at the body weight range of 550-600㎏ of Hanwoo steers. Restricted feedings of steers increased(P$lt;.0011) moisture of Longissimus muscle while decreased (P$lt;.0011) fat. Reduced(P$lt;.0001) Shear force but increased(P$lt;.0001) water holding capacity were observed from increased body weight, and this result was from the difference between feeding ad libitum and restricted feedings. No difference was, however, observed between restricted feedings. No clear differences in most cut meat production(%) except for tender loin(P$lt;.0183) and rib loin(P$lt;.0005) increased by restricted feedings. Difference in cut meat production was not also observed between restricted feedings.
유기사료 급여가 거세한우의 성장 및 도체특성에 미치는 영향
전병수,송준익,전중환,곽정훈,장선식,권응기,조영무,조원모,최희철,박규현,유용희,Jeon, B.S.,Song, J.I.,Jeon, J.H.,Kwag, J.H.,Jang, S.S.,Kwon, E.G.,Cho, Y.M.,Cho, W.M.,Choi, H.C.,Park, K.H.,Yoo, Y.H. 한국축산환경학회 2008 축산시설환경학회지 Vol.14 No.2
본 연구는 유기사료 급여가 거세한우의 성장 및 도체 특성을 구명하고자 거세한우 30두에 대한 사양시험 결과는 다음과 같다. 1, 거세한우에 대한 유기 조사료 및 농후사료 급여 시 관행구에 비해 유기구의 발육성적은 유의적인 차이를 보이지 않았으나 사양시험 종료 체중이 유기구의 T1 및 T2의 581.5kg 및 573.3kg으로 관행 597.5kg에 비해 $2.7{\sim}4.1%$ 감소하였다. 2. 일당증체량에 있어서는 유기구인 T1 및 T2의 0.80 및 0.78kg에 비해 관행구는 0.83kg으로 통계적인 유의차는 인정되지 않았으나 대조구에 비해 일당증체량이 $3.6{\sim}6.0%$ 감소되었다. 3. 도체등급에 있어서 1등급이상 출현율은 관행구 T1이 50%이었고 유기구인 T2 및 T3이 각각 50% 및 70%이었다. 4. 등심부위에 대한 관능검사 결과 다즙성, 연도, 향미는 관행과 유기구간 차이를 보이지 않았다. 이상의 실험결과를 종합해 볼 때 유기건초 및 유기 옥수수사일리지 위주의 양질 조사료 사육과 볏짚 위주의 일반 관행사육 간에 성장 및 도체특성에서 유의적인 차이를 보이지 않았으나 양질 조사료를 급여한 유기구에서 근내지방도가 개선되는 경향을 보였다. This study was carried out to investigate the effects of the organic feed on weight gain, feed conversion rate, and carcass characteristics of Hanwoo steers. Three feeding treatments(T1 : rice straw and commercial concentrates, T2 : organic hay and concentrates, T3 : organic corn silage and concentrates) for 22 months (from 6 to 28 months) were used. As a result, weight gain was not significantly different among treatments throughout this study. Also T1 tended to improve weight gain and daily weight gain without significance. The percentage of meat quality grade over the first grads ($1,\;1^+,\;1^{++}$) were 50% in the carcass of Hanwoo steers fed T1 and T2, and 70% fed T3, respectively. T2 and T3 tended to improve marbling score and oleic acid content.
점토광물질 첨가가 한우 송아지의 발육 및 면역기능에 미치는 영향
조원모,송만강,안병석,김준식,최성복,백봉현,강우성,이수기 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.6
The study was conducted to investigate the effect of dietary supplements of clay additives on the growth performance and immunity in Hanwoo calves. Treatment were composed of control(basal diet) and 3 treatments(basal diet+5% illite, bentonite, and kaolinite). This study was carried out for 90 days with a total of 16 calves from 8 days of age after birth. Basal diet(milk replacer and calf starter) were fed ad libitim during entire experimental period and the results obtained were as follows : 1. Total weight gains throughout the experimental period from 8 days to 90 days of age were 34.88, 36.10, 35.97, and 39.23㎏ for non-supplemented (control), Illite-, Bentonite-, and Kaolinite-supplemented groups, respectively. It tended to be higher in clay mineral-supplemented groups than in control group, however, no statistical significances were found. 2. Average daily intakes of calf starter were 0.66, 0.80, 0.71, and 0.76㎏, and those of hay were 0.11, 0.12, 0.10, and 0.14㎏ for control, Illite-, Bentonite-, and Kaolinite-supplemented groups, respectively. It tended to be higher in clay mineral-supplemented groups than in control group, however, no statistical significances were found. 3. The Proportion of CD2, CD4 as welt as CD8 of T cytotoxic/suppressor cell (19.67% vs 15.27 to 17.10%) was higher in control group than in clay mineral-supplemented groups.
보리 총제담근먹이 급여가 거세한우의 발육 , 사료이용성 및 육질에 미치는 영향
홍성구,조원모,이종문,윤상기,조영무,정의수 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.2
This study was conducted to investigate the effect of feeding whole crop barley silage(WBC) on growth performance, feed efficiency and meat quality in Hanwoo steers. Forty steers were allocated to control(C) which was fed rice straw overall periods and four treatment groups(T₁- T₄) which were fed both WBC and rice straw ad libitum according to the treatments and allowed free access to water. Concentrates were fed at 1.5% level of live body weight during 4-12 months of age, at 1.8% level of live body weight during 13-18 months and ad libitum after 19 months. The results obtained were as follows : The daily gain of control (C) was lower (0.7㎏) than that of treatment group (0.8㎏) and the concentrate intake per ㎏ gain during experimental periods in control (C) was higher than those of treatments, also dry matter basis obtained the same results. Cold carcass weight in Control was lower than those of other treatments except T₄, especially was lower than T₂(p $lt; .05) but fat percentages in T₂was higher. Beef quality and yield traits of steers in T₂was higher than those of treatments. Therefore WBC as roughage has effect on steer feeding system for improving meat grade and growth.