본 실험은 알코올 발효사료 처리에 따른 in vitro 발효 pattern의 변화를 검토하기 위하여 반추위내 ammonia, pH, alcohol 및 volatile fatty acids 농도와 NDF 분해율에 미치는 영향을 구명하고자 실시하였다. 비지박 알코올 발효사료(AFS)는 비지박(DM 20%)과 시판중인 배합사료(DM 87%)를 각각 50:50의 비율로 혼합하고 당밀 5%, yeast 0.5%를 첨가한 후 에서 24시간 혐기적으로 배양하여 제조

초지조성과 개량에서 겉뿌림은 중요한 방법 중의 하나이다. 오늘날 겉뿌림 초지조성에서 종자피복기술은 관심이 높아지고 있다. 따라서 본 시험은 산지초지에서 겉뿌림조성시 목초의 출현율과 정착율을 높이기 위해 화본과목초종자의 피복기술을 개발하기 위하여 실시하였다. 종자 펠렛팅은 피복시간을 단축하고 단위시간당 피복량을 증가시킴으로서 종자피복의 새로운 기술로 평가되었다. 펠렛종자의 건조시간을 단축하고 건조온도를 낮춤으로서 화본과 목초종자의 발아세와 발아율이 증가하

This study was conducted to compare the carcass characteristics of native type black pigs (Black pigs) with those of commercial cross bred pigs (Commercial pigs) with the data collected from pig farms. 8364 and 33786 records were collected from Black pigs and the Commercial pigs, respectively. The Commercial pigs were mainly from three breed crosses of Yorkshire, Landrace and Duroc. Commercial pig data was subdivided into manual and machine sub data set on the judging method. Black pigs showed lower carcass weight (CWT) and thinner back fat thickness (BFT) than Commercial pigs. However, the ratio of BFT to CWT (BFT/CWT ratio) was higher in Black pigs than Commercial pigs. The carcass grades of Commercial pigs were mostly in A and B, C, and D in descending order, while the grades D or E were observed in most carcass of Black pigs. Barrow tended to be thicker in BFT and higher in BFT/CWT ratio than gilt both in Commercial and Black pigs, and gilt were higher in loin depth (LD) and Estimated Lean Yield Percentage (ELP) which were available only in the data by machine evaluation of Commercial pigs. Residual correlation coefficient (+0.496) between carcass weight and back fat thickness in Black pigs did not differ from those in Commercial pigs which were +0.434 and +0.414 in the data by manual and machine evaluation, respectively. The linear regression coefficients of back fat thickness on carcass weight were +0.364 mm in Black pigs, and +0.257 mm (manual evaluation) and +0.236 (machine evaluation) in Commercial pigs, which suggests relative accumulation rate of BFT to the growth of weight was faster in Black pigs than Commercial pigs.

This study was conducted to examine the effect of fermented alcoholic feedstuff (FAF), sustained-release recombinant bovine somatotropin(rBST) on growth performance and body size of Korean native cattle, Hanwoo. The experiment was carried at the Livestock Breeding Station in Kangwon-do with fourteen bulls of two groups, control and treatment. Seven bulls per each group were allocateed. In control group, bulls were treated with total mixed ration(TMR) for the whole experimental periods. In treatment group, bulls were treated with TMR+FAF+rBST for the fattening period and TMR+FAF for the finishing period, respectively. The results are summarized as follows ; Average daily gains(ADG) of control and treatment groups were 0.86 and 1.11kg during the fattening period. ADG of treatment group were 29.1% higher than that of control group. For the whole experimental period, the fattening period and finishing period, ADG in control and treatment groups were 0.69 and 0.79kg, respectively, which shows 14.5% improvement of ADG in treatment group. Dry matter intake(DMI) was higher in treatment group than in control group during the finishing, fattening or whole experimental period. Feed conversion efficiencies in fattening period were 8.65 for control group and 6.93 for treatment group which shows improving 19.9% of feed conversion efficiency for treatment group, while 12.38 for control group and 14.48 for treatment group in finishing period. There were no significant differences between control and treatment group in feed conversion efficiency for the whole experimental period. Overall results indicate that the favorable feeding system to produce growth performance is TMR+FAF+rBST feeding during the fattening period and TMR+FAF feeding in treatment during the finishing period.

This study was performed to examine the effects of recombinant bovine somatotropin (rBST) and fermented alcoholic feedstuff(FAF) on blood metabolites, carcass characteristics and profitability. Sixteen Hanwoos(bulls; 8, steers; 8) with average 143㎏ of body weight were randomly assigned to bull control group(BC), steer control group(SC), bull group(BrA) treated with rBST and FAF, and steer group(SrA) treated with rBST and FAF. Sustained release rBST(0.03㎎/㎏/body weight) was administered biweekly and dose of rBST was adjusted monthly according to body weight increase. The blood glucose content was higher in the groups treated with rBST and FAF than control groups. The blood cholesterol contents tended to be lower in the treatment groups (BrA, 120.5 mg/dl; SrA, 104.0 mg/dl) than in the control groups (BC, 141.0 mg/dl; SC, 125.5 mg/dl). No significant difference between the groups of bulls and steers were found in the blood triglyceride concentrations as well as the albumin contents. The rib eye area of BC and BrA were 70 and 72 cm2, respectively, which are slightly larger than the area of SC and SrA. The treatment did not affect the backfat thickness both in bulls and steers. The marbling scores of BC and BrA appeared as No. 1 and No. 2, respectively, and No. 3 and No. 4 were obtained in SC and SrA. Lower non saturate fat concentrations were observed in the treatment groups (BrA, 64.30%; SrA, 59.59) than in control groups (BC, 58.98%; SC, 58.09%). Saturated fatty acids and amino acids contents were slightly more improved in the treatment than in the control. Average auction prices of BC and BrA were 7,900 and 8,089 wons per 1kg of carcass, respectively, whereas the prices of SC and SrA were 9407 and 9866 wons per 1kg of carcass, respectively. It is concluded that the treatment with rBST and FAF can improve the growth performance such as marbling scores and rib eye area and increase the auction prices.

본 연구는 호밀 건초를 급여하는 조건하에 알코올 발효사료에 대한 면실, 아마 및 대두종실의 첨가가 in vitro 반추위 발효특성에 미치는 영향을 구명하고자 실시하였다. 시험구 처리는 전지종실을 첨가하지 않고 발효한 알코올 발효사료구(대조구: T1), 면실종실을 첨가하여 발효한 면실 알코올 발효사료구(T2), 아마종실을 첨가하여 발효한 알코올 발효사료구(T3) 및 대두종실을 첨가하여 발효한 알코올 발효사료구(T4)의 4처리로 하였다. 배양시간에 따른 p

본 연구는 아열대 일년생 작물인 kenaf를 철원지역에서 품종 Dowling, Everglade-41, Tainung-2를 재배하여 생육특성과 광합성율을 측정하였다. 생장분석 결과 파종 후 53일째에 Everglade-41 품종이 잎 생체중과 건물중이 가장 높게 나타내었다. 줄기 무게는 Tainung-2 품종이 가장 높았으며, 93일과 115일째에서는 Dowling 품종이 줄기와 잎에서 가장 높은 생체중과 건물중을 나타내어 생산적 측면에서는 Dowlin

본 연구는 양마 3품종을 재식거리, 품종 및 수확시기에 따른 건물수량과 사료성분의 변화를 검토하고자 강원도 철원지역에서 2005년 5월 20일부터 2005년 9월 12일까지 수행되었다. 시험배치는 3반복 분할구 배치로 주구는 재식거리와 수확시기를, 세구는 양마 3품종(Dowling, Everglade 및 Tainung)을 배치했으며, 결과를 요약하면 다음과 같다. 생육일수에 따른 건물 생산량은 93일까지는 재식거리가 구에서 높게 나타났다. 품종별 건물생

본 연구는 Aspergillus oryzae(AO) 혹은 Saccharomyces cerevisiae(SC)를 첨가하여 제조한 맥주박 위주 발효사료의 급여가 한우의 반추위내 미생물에 미치는 영향을 조사하기 위해 실시하였다. 공시동물은 반추위 cannula가 장착된 한우 암소 2두를 이용하였다. 시험은 시판 배합사료 및 corn silage 급여구(대조구), 시판 배합사료 , AO 첨가 발효사료 및 com silage 급여구(TAO)와 시판 배합사료 ,

본 연구는 Aspergillus Oryzae (AO) 및 Saccharomyces cerevisiae (SC)를 첨가하여 제조한 맥주박 위주 발효사료의 발효특성 및 영양학적 특성을 검토하기 위해 실시하였다. 시험구 처리는 시험사료에 AO 를 첨가하여 제조한 발효사료 처리구(FFAO), SC 를 첨가하여 제조한 발효사료 처리구(FFSC) 및 AO 와 SC 를 첨가하여 제조한 발효사료 처리구(FFAS)로 나누었다. 48시간 발효에 따른 조단백질 함량은 처리

본 실험은 고랭지 산지초지에서 예취횟수와 시비수준이 목초의 식생변화와 건물수량 및 사료성분에 미치는 영향을 검토하기 위하여 3년간 실시하였다. 실험은 표고 600m에서 예취횟수를 2회와 3회, 시비수준을 ha당 질소-인산-칼리 200-200-200kg의 소비구 및 280-200-240kg/ha의 표준시비구로 나누어 실시하였다. 화본과목초의 비율은 2회 예취가 3회 예취보다 높았으며, 클로버 비율은 3회 예취한 소비구에서 로 가장 높았다. 잡초는 모든 처

The purpose of this study is to discuss the ways to consistently feed high quality corn silage(CS). This study evaluated the effect of the corn silage, after a certain time has elapsed, on the chemical composition and fermentation characteristics after fe

This study was carried out to investigate the usefulness of kenaf as a forage crop by studying dry matter (DM) yield and nutritive value of four different kenaf cultivars (Tainung, Fuhong, Everglade and Dowling). They were planted in Chunchon area on May 24, 2004 and harvested on July 2, 8 and 13, 2004, respectively. The DM yields were similar in all four cultivars as about 2 ton/ha on July 2, but the DM yields were significantly higher in Tainung (5 ton/ha) and Dowling (4.9 ton/ha) on July 13. In all four cultivars, the crude protein (CP) contents decreased as the harvest was delayed. In all three harvests, the CP content was highest in Dowling (17.9, 16.0 and 14.2% on July 2, 8 and 13, respectively) and lowest in Fuhong (13.3, 12.3 and 11.2% on July 2, 8 and 13, respectively). The neutral detergent fiber (NDF) contents of all four cultivars increased with the delayed harvest, although in Dowling and Everglade, the increase was rather slow after July 8. The CP cotent of leaf decreased with late harvest. The CP content was significantly higher in Dowling (about 24. 5%) compared to others. The NDF and acid detergent fiber (ADF) contents of leaf tended to increase as the harvest was delayed, but there was no significant difference among cultivars. The CP content of stem tended to decrease and this tendency was most significant on July 13. When averaged three harvests, the CP content of stem was significantly higher in Dowling as 7.5% and lower in Fuhong as 4.9%. The NDF and ADF contents of stem increased as the harvest was delayed. The results showed that the DM yields of kenaf grown in Chunchon area were similar to those of kenaf grown in Jeju area. The nutritive values of kenaf were higher than those of other forage crops such as rye or oat. Especially, the leaf of kenaf has higher CP content than alfalfa hay. However, the DM yields of kenaf were lower than those of rye, oat and Sudan grass. Therefore, we consider the harvest to be delayed after July 13 for greater DM yield, which cause the relationships between the DM yield and nutritive value to be weighed.