• Feed Journal
• /
• v.2 no.6
• /
• pp.98-101
• /
• 2004

이 시기에는 돼지의 골격이 발달하는 시기이므로 고단백, 고에너지 사료인 젖먹이 및 육성돈 사료를 무제한 급여할 것이며, 육성초기인 포유기에는 고형사료에 대한 소화흡수 능력이 부족하므로 이에 알맞는 효성활성제가 포함된 고농축 사료를 급여해야한다. (중략)

• Korean Journal of Poultry Science
• /
• v.14 no.1
• /
• pp.15-24
• /
• 1987

A total of 216 day-old broiler chickens were randomly assigned to 6 treatment combined 2 dietary protein regimens (22-20%, 20-18% for starter and finisher, respectively) with 3 times of change (2, 4, 6 weeks) to study the effects of different protein levels and time of change from starter to finisher ration on the performance of broilers. Increasing the dietary protein level resulted in not only a significant increase in the body weight gain and the protein requirement per kg body weight gain, but also an improvement of feed efficiency. However abdominal fat accumulation was decreased by adding incremental levels of protein. On the other hand, the earlier time of change from starter to finisher ration, less\ulcorner\ulcornerbody weight gain and the abdominal fat accumulation. But feed intake and viability were not affected by the dietary protein level and/or the time of change from starter to finisher ration. Income was highest for birds fed 22% and 20% protein diet' starter and finisher, respectively changed from starter to finisher at 4weeks of age.

• Journal of Animal Science and Technology
• /
• v.54 no.2
• /
• pp.141-147
• /
• 2012

The present survey was conducted to provide basic information on Hanwoo calf management. Eight hundred and sixty-two Hanwoo breeding farms from all nine provinces were surveyed via personal interviews. The percentages of farms categorized by herd size were 30.5%, 32.8%, 26.0% and 10.7% for <50 heads, 51-100 heads, 101-200 heads, and >200 heads, respectively. More than 50% of farms offered calf starter at 6-10 days of age, showing that calf starter was offered relatively at an earlier age. Calf starter was replaced every three days by 30.1% of farms. The percentages of farms replacing starter weekly (19.2%) were even higher than those of replacing starter daily (18.8%), suggesting that the frequency of replacing starter needs to be increased to maintain starter freshness and to increase starter intake. About one-third of farms offered forage at 6-10 days of age and 21% of farms offered even at 1-5 days of age although it has been well known that forage does not contain either nutrient density or nutrient profile necessary to stimulate rumen papillae development, especially before weaning. Furthermore, about half of farms used rice straw with calf starter. Water was offered relatively at an earlier age (1-5 days of age) by 55% of farms. Deciding when to wean calves should be based on starter intake rather than age but less than 50% of farms decided weaning age by starter intake. In conclusions, to reduce weaning age of Hanwoo calves by rapid rumen papillae development it is necessary to provide fresh starter and water by increasing frequency of starter replacing and water trough cleaning and not to feed forage before weaning.

• Journal of the Korean Applied Science and Technology
• /
• v.32 no.3
• /
• pp.427-438
• /
• 2015

The effects of different feeding times, using a diet containing 800 ppm betaine, on production, blood profile, and the short-chain fatty acid (SCFA), was investigated using 240 Cherry Valley (Anas platyrhynchos) meat ducks exposed to a scorching heat wave. The animals were randomly assigned to four groups, each of which was replicated three times with twenty ducks per replicate. The experimental period was 42 days for each group. Four groups were assigned into C (heat wave control group without betaine), T1 (ad libitum group fed a diet containing 800 ppm betaine), T2 (diet-restricted group fed twice daily between 05:00-10:00 and 17:00-20:00, using a diet containing 800 ppm betaine), and T3 (night-restricted group, fed from 17:00-10:00, with a diet containing 800 ppm betaine). At 42 days, body weight increased in order of T2, T1, T3 compared to the heat wave control group although. However, these differences were not found between the groups of T1 and T3. The heat wave control group, provided an ad libitum diet without betaine (C), showed an elevated feed conversion ratio compared to the groups fed a diet containing betaine. However, these differences were not found between the groups of T1, T2 and T3. RBC and platelet profiles except for PLT and MPV showed statistically significant differences between study groups fed a diet containing betaine. T2 presented significantly higher blood electrolytes $Na^+$ and $Cl^-$ than the other groups. T2 also showed a blood gas level that was generally higher than the other groups. Total SCFA, acetic acid and propionic acid concentration has been the increasing trend in T2, but butyric acid, isobutyric acid and valeric acid concentration has been the decreasing trend in T2 compared to the other groups. It is concluded that the feeding-restricted group, fed two times daily between 05:00-10:00 and 17:00-20:00, with a diet containing 800 ppm betaine may improve growth performance in meat ducks exposed to a scorching heat wave.

• Journal of Practical Agriculture & Fisheries Research
• /
• v.20 no.2
• /
• pp.49-56
• /
• 2018

Recently, attempts have been made by dairy farms to shorten the time until the first estrus by feeding animals a high-energy diet during the heifer period. Energy consumption during the heifer period has been shown to be related to milk yield and reproductive performance. The present study was conducted to analyze the relationship between reproductive performance and energy intake in heifers. There were no differences in height or body weight between animals that were fed the Korean standard diet versus a high energy diet (110% of the Korean standard). However, there was a difference in the timing of the first estrus: 329.3 days under normal energy conditions versus 311 days under high energy conditions. There was no difference in the number of artificial insemination per gestation, but both the rate of female calf production and the weight of individual female calves increased in response to the high energy diet. Based on these results, it may be predicted that the reproductive performance of dairy cows will increase when the animals are fed a high energy diet (110% of the Korean standard). These results demonstrate a correlation between the amount of energy consumed and reproductive performance, and will be of great value to the dairy farming industry.

• Korean Journal of Poultry Science
• /
• v.14 no.1
• /
• pp.25-31
• /
• 1987

This experiment was conducted to study the most economical and effective dietary protein level and feeding regimes in the performance of broilers. Four kinds of dietary protein level (25, 23, 20 and 18%) were prepared for this experiment. This experiment was carried on for 7 weeks and the results were shown as follows; 1. Increasing the dietary protein level resulted in a significant increase in the body weight gains (P〈0.05). 2. With a higher level of the dietary protein, the feed intake tended to be increased and the feed efficiency had same trends. 3. Increasing the dietary protein level resulted in a significant increase in the protein requirement per kg body weight gains (P〈0.05). 4. Viabilities were not affected by the different dietary protein levels. 5. The highest income had attained in the highest level of protein supplement, and the middle level of protein supplement was not higher than the lowest one. Conclusively, the highest level of protein supplement was considered to be adequate for the broiler's productiveity and income.

• 한우마당
• /
• v.1 no.3 s.3
• /
• pp.17-20
• /
• 2000

5월호에서는 농후사료 급여량이 비육능력에 미치는 영향 및 수익성에 대하여 기술하였다. 결국 소를 키우는데 있어서 그 소의 체질능력에 맞는 사료를 얼마만큼 적정량을 급여하느냐가 농장경영의 수익성에 중요하다는 것을 알수 있었을 것이다. 이어서 이번호에서는 출하월령이 비육능력에 미치는 영향 및 수익성에 대하여 기술하고자 한다. 소를 잘키우는 것도 중요하지만 소의 능력을 감안 어느 시기에 출하를 하여 수익을 내는가 하는것도 중요하다. 특히 거세우로 고급육을 지향하는 농가에서는 그 중요성은 말할나위없이 크다 할것이다. 조기에 출하하여 등심에 지방이 미처 참작되지 않아 육질과 육량등급에 나쁜 영향을 줄수도 있지만 너무 오래 키워서 지방이 많이 침착이 되어도 등급에서는 나쁜등급을 받을수가 있다는 것을 명심해야 할 것이다. 결국은 얼마나 적기에 출하 시기를 맞추느냐 하는 것이 농가 경영의 수익성과 밀접한 관계가 있는 것이다.

• 한우개량
• /
• no.4 s.25
• /
• pp.32-36
• /
• 2000

육성기의 포인트 [양질조사자료의 충분한 급여] 생후 13개월령까지는 뼈나 내장이 발달하는 시기이므로 영양소의 배합이 중요하며 내장의 발달을 위하여 조사료의 다량급여가 필요

• Proceedings of the Korea Society of Poultry Science Conference
• /
• 2003.11a
• /
• pp.109-110
• /
• 2003

본 시험은 스테비아 부산물의 사료적 가치를 구명하기 위하여 산란계 사료에 첨가하여 산란계의 생산성, 난 품질, 계란의 지방산에 미치는 영향을 고찰하였다. 공시계는 78주령 하이라인 360수로 강제환우후 5％ 산란시기에 시행하여 총 20주 동안 사양시험을 시행하였다. 스테비아 부산물을 산란계 사료에 0, 2, 4, 8 ％를 첨가하여 동일한 에너지(2,800 kcal/kg)와 단백질(16 ％) 수준으로 급여하였으며, 처리구당 5반복, 반복당 18수씩 총 360수를 공시하였다. 시험기간 20주 동안, 총 산란율, 난중, 산란량, 사료요구율은 스테비아 부산물 급여구와 대조구 사이에 유의적인 차이는 없었다. 스테비아 부산물의 급여가 계란의 난 품질에 미치는 영향에서 난각강도, 난각두께, 난백고 및 Haugh Unit는 대조구와 차이가 없었지만, 난황색도는 스테비아 부산물의 급여수준이 증가할수록 높은 수치를 보여 스테비아 4 ％와 8 ％ 급여구는 대조구에 비하여 유의적으로 증가하였다. 계란의 당 전이도 시험에서는 스테비아 부산물을 급여하여 생산된 계란과 대조구 사이에 차이가 없었다. 계란의 지방산 함량은 스테비아 부산물 2 ％와 4 % 급여구가 포화지방산은 감소하였고, 단가 불포화지방산은 유의적으로 증가하였다. 이러한 결과 산란계 사료에서 스테비아 부산물은 원료사료로서 8 ％까지 가능하였다.

• Food Science of Animal Resources
• /
• v.24 no.3
• /
• pp.221-224
• /
• 2004

The feeding group, composed of weaning pigs fed 3 mL of glucosamine derivatives, was compared for the carcass and quality characteristics with the unfeeding control group for 25∼70 days since they were born. The results were as follows; There were no significant differences in carcass weight and back-fat thickness between the feeding group and the unfeeding group although the feeding group had low ranges of standard error when compared to the control. Feeding group had higher incidence frequencies of A grade (42.7%) than the control (29.2%). The feeding group and unfeeding group had no significant differences in meat color, cooking loss, WBS, pH, WHC and purge loss. Results from this study showed that feeding GD had effect on the decrease the market weight and production of consist carcass weight, however, the feeding GD had no effect on pork quality during rearing times after weaning.