• Proceedings of the Korea Society of Poultry Science Conference
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• 2005.11a
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• pp.78-79
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• 2005

Effects of dietary lactose or killed Salmonella on the performance, immune response and anti-oxidant system was studied in chicks innoculated with Salmonella typhimurium. In 27 days of age broiler, dietary lactose decreased performance, while dietary lactose and killed Salmonella elevated plasma peroxidase activity and IL-1 level in supernatant of PBMC stimulated with LPS. When broiler chicks innoculated with Salmonella, performance, activities of erythrocyte MnSOD and plasma peroxidase were enhanced after 7 days of the innoculation. Dietary lactose and killed Salmonella increased activity of erythrocyte MnSOD, plasma peroxidase, proliferation of PBMC stimulated with LPS and IL-1 level in the supernatant after 15 days of the innoculation. The result indicated that dietary lactose and killed Salmonella have modulated innate immune response and antioxidant system in broiler chicks innoculated with Salmonella typhimurium.

• Korean Journal of Poultry Science
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• v.11 no.1
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• pp.41-47
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• 1984

The study was carried out to investigate the optimum marketing weight of broiler to maximize income from broiler rasing. The change of broiler prices between 10% above or below from present base did not affect to net income ratio to income and investment efficiency. In the case of feed price was 10% down from present base, broiler farmer's income was the highest when marketed at 76 days of age, and net income was highest when marketed at 61 days of age. In the case of feed price was 10% rise from present base, broiler farmer's income was highest when marketed at 18 days of age and net income ratios to income and investment efficiency were highest when marketed broilers as 53 and 57 days of age.

• Korean Journal of Environmental Agriculture
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• v.20 no.2
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• pp.122-126
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• 2001

The effect of the fermented food wastes (FFW) on growth performance and feeding efficiency war investigated in growing-finishing pigs. Four treatments with different mixing rates [0% FFW (100% commercial diet: control) ; 25% FFW ; 50% FFW ; and 100% FFW] were tried. Twenty heads of cross-bred barrows ($Duroc\;{\times}\;Landrace$, average live weight : 28.5 kg) were divided into 4 treatments with 5 replicates. During entire feeding trial (10 to 27 week), average daily gain increased by 29.4% and 13.9% in 25% FFW and 50% FFW, but decreased by 38.2% in 100% FFW compared to control. Daily feed intake was the highest in 25% FFW and it greatly decreased in 50% and 100% FFW feeding. The amount of feeds required for weight gain was similar with control in 25% FFW or significantly decreased in 50% FFW, while greatly increased in 100% FFW feeding. Cost of feeds per kg weight gain was decreased by 28.6%, 49.4% and 32.6% in 25%, 50% and 100% FFW, respectively. The results showed that replacement up to 50% with fermented food wastes was advantageous with respect to feed efficiency and feed cost, but 100% FFW feeding was disadvantageous because of a very low feed efficiency.

• 월간낙농육우
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• v.27 no.9 s.305
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• pp.172-178
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• 2007

우리나라의 젖소 사육농가도 예전과는 달리 효율적인 사양관리를 기하기 위해 부단히 노력한 결과, 조사료와 농후사료의 배합비율이나 사료의 질과 양을 어느 정도로 급여하는 지를 사육농가가 관심을 가지는 농가가 늘고 있는 추세이다. 특히 젖소사양관리에서는 고품질우유, 고능력우가 증가하면서 우유의 생산성, 고능력우의 선발육종, 송아지의 조기육성시스템, 분만간격단축 등에 현저한 향상을 보이고 있다. 젖소는 건유기의 조사료위주의 사양으로부터 비유최고조기에 농후사료위주 사양에 이르면서 사료의 급격한 변화에 따라 짧은 기간내에 적응하지 않으면 안된다. 이러한 이유로 인해서 영양불량응로 인한 대사성질병들의 발생이 증가하고 있는 실정에 비추어 소의 생리적조건에 맞는 필요한 영양분을 충분하게 공급하여 주지 않으면 안된다.

• Korean Journal of Poultry Science
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• v.8 no.1
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• pp.37-45
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• 1981

급격히 증가하는 세계의 인구수는 가축의 사료자원을 질이 좋은 인간 식량으로 효율적으로 전환할 필요성을 절실케 하고 있다. 산란계는 유전적인 선택에 의해 최소량의 사료로써 높은 산란율을 유지할 수 있도록 개선되어 왔다. 배합사료의 생산에 사용될 수 있는 단미사료의 종류와 품질은 어느 특정한 영양소의 요구량에 의하여 좌우된다. 산란계의 영양요구량은 오랜동안 연구되어 왔으며, 미국의 국립연구위원회 (NRC)는 영양소 요구량을 정기적으로 검토, 요약하고 있다. 새로운 정보들은 출판되어 왔으며 본인은 여기서 제7차로 개정된 NRC 사양표준(1977)에 발표된 요구량에 관련해서 몇 가지 분야를 검토하고자 한다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1993.10a
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• pp.21-22
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• 1993

현재 축산 낙농가에 급여되는 배합사료는 공장의 비전문화에 따르는 생산효율의 저하, 가축 사육농가의 조사료 및 부원료의 생산지의 조사료 및 부산물 사료를 고려하지 않은 배합비율, 과다한 투자 비용에 따르는 생산원가의 상승 등의 여러가지 문제들을 가지고 있다. 이러한 문제들을 해결하기 위한 하나의 방안으로 지역별로 또는 낙농단지별로 규모에 알맞는 소규모 젖소ㆍ비육우 전용 사료가공시설의 모델을 6가지 개발하였으며, (중략)

• KOREAN POULTRY JOURNAL
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• v.47 no.3
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• pp.112-115
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• 2015

환기, 온도, 급이, 급수 등 농장을 경영하다 보면 신경써야하고 중요하지 않은 일이 없다. 또한, 이 모든 것들이 생산성과 직결되기에 어느것 하나 소홀할 수 없는 일이다. 이중에서 사료급이는 생산성 향상과 농장경영비절감 등에 관계되어 농가 수익성에 큰 영향을 끼친다. (주)한농바이오텍(대표이사 이상종)은 효율적으로 사료를 관리할 수 있는 '사료계량기'와 '사료빈 자동 온도조절장치'로 농가의 수익성 향상에 일조 하고 있다. 이번호에는 (주)한농바이오텍을 소개코자 한다.

• Journal of Sericultural and Entomological Science
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• v.23 no.2
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• pp.37-49
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• 1982

Larvae of the silkworm (Bombyx mori L.) were reared during the 5th instar on the four kinds of artificial diets on the basis of the different amounts of soybean meal used as the protein source. In this experiment it was shown that the various levels of protein in the diet affected not only the growth and silk production but the digestibility of the diet. haemolymph protein and uric acid excretion. The results obtained are summarized as follows; 1. By an increase of the level of protein in the diet the apparant digestibility was increased. but the protein digestibility was comparatively decreased. 2. Larval body weight increment was not observed by the 3rd day of the 5th instar, but was increased from the 4th day as the level of protein was increased in the diet. 3. After the 3rd day of the 5th instar, protein content in the hemolymph was increased steeply by an increase of the protein content in the diet. However, the percentage of hemolymph protein to the ingested protein was decreased from the 2nd day of the 5th instar and increased more or less after the 4th day. 4. An increase of the uric acid excretion was observed as the content of protein in the diet was increased but the pattern of the uric acid excretion was different between high and low-protein diet. However, the percentage of the uric acid excretion to the ingested protein and to the hemolymph protein were both decreased steeply after the 2nd day of the 5th instar. 5. It was also evident that the high-protein diet increased the cocoon productivity. 6. It showed that the feed efficiency for body weight increment and silk formation was high by an increase of the level of protein in the diet, but the protein efficiency was not.

• Journal of Aquaculture
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• v.21 no.2
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• pp.107-110
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• 2008

This study was conducted to evaluate extruded pellet for the growth of grower Korean rockfish Sebastes schlegeli. Two replicate groups of 150 fish per each tank(initial mean weight 112 g) were fed one of four experimental extruded pellets for 8 months. Survival was 100% in all groups. Final mean weight, feed efficiency and protein efficiency ratio, feed intake and hepatosomatic index were not significantly different among all groups. Proximate compositions of the whole body and liver were not significantly different among all groups. It can be concluded that the dietary formulation used in four extruded pellets could be applied in the practical extruded pellet for grower Korean rockfish.

• Journal of Sericultural and Entomological Science
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• v.24 no.2
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• pp.73-80
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• 1983

1. The varietal difference in amylase activity of the digestive fluid of the 5th instar larvae reared on the artificial diet was investigated, using the parent commercial silkworm varieties of Japanese strain. The amylase activity was large different among silkworm varieties. The activity was strong in Hansaeng-1, Jam 115 and Jam 117, medium in Hansaeng-3, Jam 113, Jam 119, and Jam 201, weak in Jam 107, Jam 121 and Gyeongchu. The amylase of the digestive fluid of ten parent commercial silkworm varieties is possible-(ae) type, compared with ＋(＋$\^$ae/) type of Daizo. 2. To investigate the effect of a-amylase pre-treatment of the artificial diet, larvae were fed with the diet treated by a-amylase during 4th-5th instar periods. The blood sugar content and cocoon qualities were slightly higher in the experimental larvae than those in the control, while showing the slight less body weight, amylase activity and dietary efficient.