• 월간피드저널
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• 제2권3호통권7호
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• pp.126-129
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• 2004

• Animal Bioscience
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• 제36권4호
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• pp.529-539
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• 2023

The beef cattle industry in China has advanced remarkably since its reform and opening up; consequently, China has become the world's third-largest beef cattle producer. China is also one of the countries with the most substantial research input and output in the field of beef cattle feed and nutrition. The progress and innovation by China in the research field of beef cattle feed and nutrition have undoubtedly promoted the development of the domestic beef cattle industry. This review summarizes recent advances in feed resource development, nutrient requirements, and nutritional regulation of beef cattle in China. Limitations in current research and perspectives on future work are also discussed.

• Asian-Australasian Journal of Animal Sciences
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• 제33권10호
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• pp.1617-1623
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• 2020

Objective: This study was conducted to investigate the effects of dietary probiotic blend and liquid feed program at different nutritional densities on growth performance, nutrient digestibility, fecal score of weaning piglets. Methods: A total of 120 weaning pigs with an initial body weight of 7.05±0.93 kg per pig (21 days of age) were randomly allocated into 1 of the following 8 dietary treatments (3 replicates per treatment with 5 pigs per replicate) in a 2×2×2 factorial arrangement (nutrition levels: apparent metabolic energy [AME] = 3,500 kcal/kg, crude protein [CP] = 20% vs AME = 3,400 kcal/kg, CP = 19.42%; feed types:dry vs wet; probiotics levels: 0 mg/kg vs 300 mg/kg). Results: During d 5 to d 15, greater average daily gain (ADG) and average daily feed intake (ADFI) (p<0.05) were observed in probiotics treatments. During d 15 to d 25, gain:feed (G:F) ratio (p<0.05) were significantly improved in probiotics, wet feed and high nutrition diet. Moreover, two interactions i) between nutrition levels and feed types, and ii) between nutrition levels and probiotics were found in G:F ratio. Furthermore, there was a significant positive interaction on G:F among those 3 factors (p<0.05). Overall, increasing ADG, ADFI, and G:F ratio were detected in probiotics treatment significantly (p<0.05). Besides, an obvious reduction on fecal score was observed in probiotics treatment from d 0 to d 5 (p<0.05). There was an interactive effect on fecal score between feed types and nutrition concentrations from d 5 to d 25 (p<0.05). Conclusion: These results indicated that probiotics supplementation could benefit growth performance and reduce the frequency of watery feces. Besides, wet feed program (feed:water = 1:1.25) could improve the G:F. The effect of liquid feed or probiotic could be influenced by dietary nutrition density in weaned piglets. An increased value of G:F was obtained when wet feeding a high nutrition diet (100 kcal higher than NRC 2012 recommendations) was supplemented with probiotics for 15 to 25 days.

• KSBB Journal
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• 제30권2호
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• pp.58-62
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• 2015

본 연구에서는 산란계의 in vivo실험을 통하여 난황 레시틴추출 부산물이 산란계의 뼈의 Ca 침착과 성장에 도움을 줄 수 있다는 결과를 얻었다. 산란계 전기 사료에 Ca의 수준을 0%, 0.2%, 0.4%, 0.6%로 조절하여 실험한 결과 증체량에서 0%, 0.2% Ca을 첨가한 그룹의 증체량은 유의적으로 감소하였으나 0.4%, 0.6% 첨가 그룹에서는 정상적인 성장율을 확인하였다. 반면에 0.4% Ca을 첨가한 그룹에 레시틴 추출 부산물을 0.2%, 0.4% 첨가한 그룹에서 각각 1.5%, 7.1%로 증가하여 농도의존적으로 증가하는 경향을 보였으나 유의한 차이는 없었다. 실제 산란계의 경골을 적출하여 중량, 회분, Ca의 함량을 조사한 결과 경골 중량에서는 0.4% Ca 첨가그룹에 비해 레시틴 추출 부산물을 추가로 첨가한 그룹에서 각각 8.4%, 13.4%로 증가하는 경향을 확인하였다. 회분량에서도 0.4% 첨가 그룹에 비해 레시틴 추출 부산물 첨가그룹에서 증가하였지만, 유의한 차이는 없었다. 경골내의 Ca 함량을 조사한 결과는 0.4% Ca 첨가그룹에 비해 레시틴 추출 부산물이 4.3%, 5.9%가 각각 유의한 경향으로 증가하였다. 경골에 실제로 Ca이 흡수되었는가를 확인하기 위하여 lateral femoral joint 부분을 von Kossa's stain을 실행한 결과 Ca 결핍 그룹에서 Ca 축적이 현저히 감소한 것을 확인한 반면, 그 외 그룹에서는 Ca이 충분히 침착되어 있었으며 산란계 사료내의 적정 Ca 함량이 0.4%라는 것을 다시 한번 확인하였다. 본 연구에서는 계란 난황의 레시틴 추출 부산물의 단백질 분획 소재를 이용하여 뼈 성장 촉진 인자 및 Ca 흡수촉진 보조제로서의 가능성을 보여줬으며, 그 기대를 높이기 위해 혈액분석, 측정항목의 세분화 등 반복적인 연구가 수반되어야 하겠다.

• Asian-Australasian Journal of Animal Sciences
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• 제28권7호
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• pp.999-1005
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• 2015

Bacillus-based feed additive was evaluated for its efficacy on growth performance, nutrient digestibility, fecal gas emission, and the consumption of time and amount of water for cleaning the pen of growing finishing pigs. A total of 120 growing pigs ($23.59{\pm}1.41kg$) were used in a 16-wk feeding trial. Pigs were randomly distributed into 1 of 2 treatments on the basis of body weight and sex. There were 12 replicate pens per treatment, with 5 pigs (3 barrows and 2 gilts) per pen. Dietary treatments were CON which was basal diet, and T1 which was CON+62.5 ppm microbial feed additive that provided $1.47{\times}10^8cfu$ of Bacillus organisms per gram of supplement. During the weeks 0 to 6, average daily gain (ADG) in T1 treatment was higher (p<0.05) than CON, but no improvement in average daily feed intake (ADFI) and feed efficiency (G:F) was noted. During 6 to 16 weeks, no difference (p>0.05) was noted in growth performance. However, ADG was improved (p<0.05) and overall ADFI tended (p = 0.06) to improve in T1 compared with CON. At week 6, the co-efficient of apparent total tract digestibility (CATTD) of dry matter (DM) nitrogen (N) was increased (p<0.05) in T1 compared with CON. Fecal $NH_3$ emission was decreased (p<0.05) in T1 compared with CON, at the end of 6th and 15th weeks. The time and water consumed for washing the pens were decreased (p<0.05) in T1 compared with CON. In conclusion, supplementation with Bacillus-based feed additive could improve the overall growth performances, increase the CATTD of DM and decrease the fecal $NH_3$ content and the time and water consumed in washing the pens for growing-finishing pigs.

• 농업과학연구
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• 제45권4호
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• pp.677-685
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• 2018

Weaning pigs often face post-weaning challenges such as diarrhea, low feed intake, and body weight (BW) loss which affects the health and economic value of weaning pigs. Interestingly, the use of yeast cultures (YCs) as feed supplements for pigs has increased markedly in recent years. This study evaluated the effects of yeast cultures (Saccharomyces cerevisiae) on the growth performance, fecal score, and nutrient digestibility of weaning pigs. A total of 50 crossed healthy weaning pigs [(Yorkshire ${\times}$ Landrace) ${\times}$ Duroc] with an average BW of $7.46{\pm}1.60kg$ (28 day of age) were used in a 6-week experiment. The experiment was divided into 3 phases (Phase 1, 1 - 2 weeks; Phase 2, 2 - 4 weeks; Phase 3, 4 - 6 weeks). Dietary treatments were as follows: 1) CON: basal diet and 2) CON + 0.50% YC. During phase 1, the average daily gain (ADG) and average daily feed intake (ADFI) were significantly increased (p < 0.05) in the weaning pigs fed YC supplementation diets compared with the weaning pigs fed the CON diet. During phase 3 as well as overall, the gain/feed ratio (G/F) was significantly increased (p < 0.05) in the YC supplementation group compared with the pigs fed the CON diet. In conclusion, the supplementation of YCs in the diet positively affected the growth performance of weaning pigs during the first two weeks after weaning.

• 농업과학연구
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• 제46권2호
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• pp.229-237
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• 2019

The influence of dietary supplementation with a yeast culture on growth performance, fecal score and nutrient digestibility was evaluated in weaned pigs in a 6-week feeding trial. A total of 50 weaning pigs with an initial average body weight (BW) of $7.46{\pm}1.60kg$ were randomly allotted into 1 of 2 dietary treatments according to the initial BW. There were 5 replicate pens in each treatment with 5 pigs per pen. The dietary treatments were as follows: 1) control, basal diet (CON) and 2) 0.10% yeast culture, basal diet supplemented with 0.1% yeast culture (YC). The average daily feed intake was significantly improved with the dietary supplementation of the yeast culture compared with the control during phases 1 and 3. Overall (0 to 6 weeks), dietary supplementation with the 0.1% yeast culture had a significant effect on the feed conversion ratio (FCR). There was no significant difference in the fecal score between the CON and YC dietary treatments. In addition, no difference in the apparent total tract digestibility was observed between the CON and YC dietary treatments. Collectively, the results of this study indicate that dietary supplementation of 0.1% yeast only improved the feed intake of weaning pigs; however, yeast culture supplementation did not affect the average daily gain, feed efficiency, total tract digestibility of dry matter, and nitrogen and energy levels as well as the fecal scores.

• Journal of Animal Science and Technology
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• 제64권4호
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• pp.696-706
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• 2022

This study was conducted to evaluate the effects of dietary supplementation of Silybum marianum seed (SMS) extract on the growth performance, nutrient digestibility, fecal noxious gas emission, and hematology parameters in weaned piglets. A total of 120, 21-day-old weaned piglets ([Yorkshire × Landrace] × Duroc) were randomly assigned to 3 groups based on the average initial body weight (6.46 ± 0.45 kg). There were 8 replicate pens per treatment and 5 pigs (mixed sex) per pen. The experimental period was 42 days. Dietary groups included a basal diet, and a basal diet supplemented with 0.05% or 0.10% SMS extract. Feeding weaned piglets with SMS extract containing diet significantly increased average daily gain and average daily feed intake. Additionally, the supplementation of SMS extract had no significant effects on nutrient digestibility, serum hematology, and fecal noxious gas emission parameters. We considered that the supplementation of SMS extract had positive effects on the voluntary feed intake in weaned piglets, thus improving growth performance.

• Asian-Australasian Journal of Animal Sciences
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• 제24권6호
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• pp.851-856
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• 2011

This study was conducted to evaluate the effects of flavor supplementation on pre- and post-weaning performance and behavior of piglets and sows. A total of 30 sows (Landrace${\times}$Yorkshire) and their litters were employed in this study. Sows were randomly assigned to 3 dietary treatments (10 replications per treatment). Dietary treatments included: i) CON, basal diet; ii) TRT1, CON+0.1% vanilla supplement; iii) TRT2, CON+0.1% cheese supplement. The behavior of sows (nursery, eating and standing) and piglets (eating, sleeping and fighting) in each treatment was monitored throughout experiment. Each piglet was weighted at 5, 10, 15 and 21 d after birth to evaluate the average daily gain. Sows and piglets were bled on the weaning d to evaluate the blood characteristics. Back fat and estrus interval were investigated. In this study, there were no differences (p>0.05) in diarrhea score and blood characteristics among treatments. Likewise, the behavior was not influenced (p>0.05) by the dietary flavor supplementation. However, administration of flavor increased (p<0.05) the pre-weaning feed intake, post-weaning average daily gain (ADG) and gain/feed (G/F) ratio. No significant difference was observed (p>0.05) on the blood characteristics, behavior, backfat loss and estrus interval among treatments. In conclusion, administration of flavor could increase creep feed intake pre-weaning and piglet ADG post-weaning, whereas inclusion of flavor had no influence on blood characteristics and performance in sow and piglets.

• 한국축산시설환경학회지
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• 제11권1호
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• pp.61-70
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• 2005

본 실험은 남은 음식물에 유기성 부산물인 육계분, 제과부산물, 밀기울, 맥강 등을 주요 수분흡수제 또는 영양 보충제로 혼합한 후 rotary drum 방식을 이용하여 양돈 사료화 하는데 있어서 이상적인 배합비 도출을 위한 공정단계별 사료의 영양적 flow를 4차 시험에 걸쳐서 추적하였다. Rotary dm 방식을 이용한 살균 및 숙성 과정을 거치면서 영양소의 변화 폭은 매우 낮았으며, 살균 및 숙성 처리 후의 건물 손실율은 $8{\~}15\%$ 수준이었다. 시험별로 영양소 변화는 혼합되는 사료 원료의 종류에 따라 다르게 나타났다. 남은 음식물, 퇴적발효육계분, 제과부산물, 맥강의 최적 혼합 비율은 45: 10: 22.5:22.5 이었고, 이때 사료간의 뭉쳐지는 현상을 극복할 수 있었다. 결과적으로 rotary durm 방식으로 살균하고, 숙성한 남은 음식물 혼합물은 양돈 사료로서의 충분한 사료 영양적 가치가 있었다.