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배합사료 가공 형태가 반추가축 체내 이용성에 미치는 효과
정준(J. Jeong),김광림(G. L. Jin),Shinekhuu Jugdder,지병주(B. J. Ji),송만강(M. K. Song) 충북대학교 동물생명과학연구소 2009 동물생명과학연구 Vol.2 No.-
본 시험은 한우용 배합사료 중 비육 후기용 가루사료, 펠렛사료 그리고 후레이크 사료로 주요 영양소 함량은 동일하되 물리적인 가공형태에서 차이가 있는 사료의 반추위 발효성상과 전장소화율의 평가를 통하여 사료의 체내 이용성 및 경제성을 분석하고자 반추위에 캐뉼라가 장착된 소 3두를 이용하여 6주 동안 3×3 라틴 방각법에 의하여 실시하였다. 농후사료와 조사료(볏짚)의 비율을 80:20으로 하여 1일 10㎏(건물 기준)을 2회 균등하게 나누어 오전 8시 및 오후 6시에 급여하였으며, 물과 미네랄블록은 자유채식 시켰다. In situ 시험은 1㎜ 스크린으로 분쇄된 가루, 펠렛 및 후레이크 사료를 nylon bag에 5g 넣은 후 0, 1, 3, 6, 12 및 24h 후에 각각의 nylon bag을 채취하여 분석하였다. 조사된 결과를 요약하면 다음과 같다. 시험사료 간, 건물, 유기물과 NDF의 예상 분해율은 후레이크사료가 펠렛사료와 가루사료에 비하여 다소 낮은 것으로 나타났으나 유의적인 차이는 없었고, 조단백질의 유효 분해율은 이와 반대되는 경향을 나타냈다. 사료 급여 전과 급여 후 반추위액의 pH와 ammonia-N의 농도는 처리구간 차이가 없었다. 반추위액의 총 VFA 농도는 전 시료채취 시간에 걸쳐 유의적인 차이는 없었으나, 사료 급여 후 3시간이 경과하였을 때, 펠렛사료 급여구 보다는 가루사료 급여구에서 보다 많은 VFA가 생성된 것으로 나타났다(P<0.05). 세 처리구 간, VFA 조성비율에는 유의적인 차이가 없었다. 건물, 유기물 및 조단백질의 전장소화율은 대체적으로 가루사료 처리구가 펠렛사료와 후레이크 사료 처리구에 비하여 다소 낮은 것으로 나타났으나, 유의적인 차이는 없었다. 그러나, 조지방의 전장소화율에서는 가루사료가 후레이크 사료보다 많이 낮은 것으로 나타났다(P<0.05). 이러한 결과로 미루어 보아 펠렛사료와 후레이크사료보다 가격이 저렴한 가루사료를 급여하였을 때, 가공과정 단축에 따른 사료비를 절감 할 수 있는 것으로 나타났다. The metabolic trial was conducted with three ruminally cannulated cow in a 3 × 3 Latin square design to estimate the effects of feed processing(flour, pellet and flake) on ruminal effective degradability, rumen fermentation characteristics and whole tract digestibility of feeds. Cows were fed 10㎏ (DM basis) of concentrate and rice straw in 80% to 20% ratio, twice daily in an equal volume. Effective ruminal degradability of DM, CP and NDF were not influenced by the processing method of concentrates. The rumen pH and ammonia-N concentration were not differenced in three concentrate treatment either. Total VFA concentration and individual VFA’s molar proportion were not effected by processed feeds. Whole tract digestibility of EE was increased(P<0.05) for the cows fed pellet and flaked concentrate than for fcows ed flour type of concentrate, but those of DM, CP and NDF were not different among processing methods of concentrates. Based on the results obtained from the current experiment, flour concentrate was slightly more economical than pellet and flake type of concentrate due to the lower cost than pellet and flake concentrates.
재조합 소 성장호르몬 투여수준이 한우 및 홀스타인 비육우의 육성성적에 미치는 영향
정준(J . Jeong),신종서(J . S . Shin),엄창국(C . G . Yan),장병선(B . S . Chang),홍병주(B . J . Hong) 한국축산학회 1996 한국축산학회지 Vol.38 No.4
This study was performed at the private Hanwoo farm, Hongcheon-gun in Kangwon-do with thirty two Hanwoo bulls and at the Samyang Taekwanryeong farm in Kangwon-do with forty Holstein bulls. They were assigned to completely randomized block design with alloting control and three doses of sustained release recombinant bovine somatotropin(SR-rBST), 0.03㎎/㎏ body weight (BWy14d(0.03mg group), 0.06㎎/㎏ BW/14d(0.06㎎ group) and 0.09㎎/㎏ BW/14d(0.09㎎ group). SR-rBST was administered biweekly and doses of SR-rBST were adjusted monthly according to BW increase. Initial average BWs of Hanwoo and Holstein bulls were 430㎏ and 334㎏, respectively. The purpose of experiment was to examine the effect of SR-rBST on growth and body conformation rate. The results are summarized as follows ; Average daily gains(ADG) of control, 0.03㎎, 0.06㎎ and 0.09㎎ groups were 1.02㎏, 1.18㎏, 1.11㎏ and 1.08㎏, respectively, for the experimental period in Hanwoo bulls. Administration of SR-rBST 0.03㎎/㎏ BW/14d, 0.06㎎/㎏ BW/14d and 0.09㎎/㎏ BW/14d moderately increased ADG by 15.7%, 8.1%o and 5.9%, to that of control group. Daily dry mater intakes were not different among treatments. These results indicate that SRrBST treatments tended to increase feed efficiency(FE). In ten items of body conformation measurements, SRrBST administration significantly increased withers height and chest width in comparison with control(P$lt;0.05) and 0.09㎎ group was more effective than other groups in Hanwoo. SR-rBSTs increased ADG in Hanwoo bulls by 4th month(average BW of 550㎏) after SR-rBST injection, however, ADGs at 5th and 6th month, at finishing period, were slightly decreased over control within monthes. In otherwise, ADGs of control, 0.03㎏, 0.06㎏ and 0.09㎏ groups in Holstein bulls were 1.20㎏, 1.28㎏, 1.16㎏ and 1.20㎏, and no statistical significances were found among treatments. However, ADG of 0.03㎏ group tended to be increased only 6.7%. SR-rBST treatments tended to increase body length, chest girth, chest width and ramp length in Holstein bulls. ADGs of 0.03㎏, 0.06㎏ and 0.09㎏ groups were decreased in comparison with control at lst and 2nd month after SR-rBST ingection, however, ADGs of those groups were increased at 3rd and 4th month(belong to fattening period) after SR-rBST injection. These results indicate that administration of 0.03㎎/㎏ BW/14d of SR-rBST increase meat productivity by increasing of ADG, FE and body conformation in fattening period.
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.