A5014305398- Ruminant Nutrition and Digestive Physiology
- Agriculture, Soil, Plant Science
- Genetic and phenotypic traits in livestock
- Food Quality and Safety Studies
- Milk Quality and Mastitis in Dairy Cows
- Animal Nutrition and Physiology
- Effects of Environmental Stressors on Livestock
- Infant Nutrition and Health
- Plant and fungal interactions
- Nutrition, Health and Food Behavior
- Meat and Animal Product Quality
- Fungal Biology and Applications
- Selenium in Biological Systems
- Reproductive Physiology in Livestock
- Protein Hydrolysis and Bioactive Peptides
- Fatty Acid Research and Health
- Sperm and Testicular Function
- Peroxisome Proliferator-Activated Receptors
- Reproductive Biology and Fertility
- Probiotics and Fermented Foods
- Peanut Plant Research Studies
- Pharmacological Effects of Natural Compounds
- Moringa oleifera research and applications
- Phytochemicals and Antioxidant Activities
- Animal Disease Management and Epidemiology
Jeonbuk National University
2019-2021
International University of Korea
2014
National Institute of Animal Science
2010
National Institute of Agricultural Science and Technology
2008
Hannah Research Foundation
2003
A 6-wk study was conducted to determine the effect of feeding diets containing an antibiotic, a probiotic, or yucca extract on daily gain, feed conversion ratio, and urease activity ammonia production in intestinal contents broiler chicks. Four replicates 10 chicks (average body weight, 48 g) each were assigned control 0.1% chloroxytetracycline (antibiotic), Lactobacillus casei (probiotic), 0.2% extract. Feeding diet probiotic significantly (P < 0.05) increased average gain during first 3-wk...
This study investigated the effects of heat stress on milk production in Korean Holstein cows using large-scale data. Heat was assessed temperature-humidity index (THI). Weather records (2016 to 2020) were collected from 70 regional weather stations an installed automated surface observing system (ASOS). A dataset 2,094,436 215,276 obtained Dairy Cattle Genetic Improvement Center analyzed. Stepwise selection used select input variables, including daily maximum THI (THI_max). Least-squares...
Background: Ensiling spent mushroom substrate (SMS) generally increases its nutrient digestibility and quality. Objective: To determine the feed quality of SMS from Pleurotus ostreatus (SMSP) inoculated with lactic acid bacteria (LAB: Lactobacillus brevis) in Hanwoo steers. Methods: Ruminal disappearance SMSP (ISMSP) were evaluated three rumen-fistulated steers (408 ± 13.0 Kg body weight). Further, healthy (336 69.0 weight) randomly allotted to one dietary treatments (control: 25% straw, 75%...
This study was conducted to evaluate the effects of dietary conjugated linoleic acid (CLA) on performance lactating sows and piglets as well immunity suckling from fed CLA. Eighteen multiparous Duroc with an average body weight (BW) 232.0 ± 6.38 kg were randomly selected assigned two treatments (n = 9 for each treatment), control (no CLA addition) 1% supplementation. For diet, replaced soybean oil. Experimental diets during a 28-day lactation period. Litter size sow standardized nine by...
Limiting amino acids (AAs) for milk production in dairy cows fed on a concentrate diet of corn grain and soybean meal was evaluated this study. Four lactating multiparous Holstein (in third or fourth parities, with an average body weight 633 ± 49.2 kg), 8 to 9 weeks into their lactation period, were used 4 × Latin square design. The experiment comprised four dietary treatments: (1) no intravenous infusion (control); (2) control plus AA mixture 6 g/d methionine, 19.1 lysine, 13.8 isoleucine,...
본 연구는 찔레의 열수추출물과 에탄올추출물간의 항산화 활성 비교를 위해 in vitro에서 총 페놀 및 플라보노이드 함량을 측정하였으며, DPPH, ABTS, NO radical 소거능 환원력을 <TEX>$10{\sim}500{\mu}g/ml$</TEX>의 농도에서 실험하였다. DPPH 소거능은 열수추출물(4.95~92.15%)과 에탄올추출물(2.76~90.55%)이 모두 농도 의존적으로 유의성 있게 높아졌으며 열수추출물이 더 높은 소거능을 보였다. ABTS 비교한 결과 열수추출물(4.44~92.99%)이 에탄올추출물(2.63~87.12%)에 비해 유의적으로 소거활성을 나타내었다. 환원력은 열수추출물(0.256~0.775)이 에탄올추출물(0.234~0.568)에 활성을, 그리고 높아지는 것을 보였으며, 에탄올추출물보다 조금 활성을 보였고 확인하였다. 찔레추출물의 항산화력의 <TEX>$IC_{50}$</TEX>값을 소거능, 소거능에서 각각 열수추출물에서 79.73,...
This study was conducted to determine effects of different selenium (Se) sources on performance, carcass characteristics, blood measures (whole Se concentration and plasma glutathione peroxidase (GSH-Px) activity), concentrations in tissues finishing Hanwoo steers (Korean native steers). Twenty (average body weight = 536??3.4 kg, average age approximately 20 months) were allotted treatments four groups five per pen for 16 weeks preceding slaughter. Treatments control (CON), spent mushroom...
Effects of spent composts selenium-enriched mushroom (Se-SMC) on plasma glutathione peroxidase (GSH-Px) activity and selenium (Se) deposition in finishing Hanwoo (Bos taurus coreanae) steers were investigated.Twenty-five (average body weight = 613 kg, average age 22 months) allotted to treatments five groups per pen for 12 weeks preceding slaughter.Treatments SMC alone (CON; 0.1 ppm Se), 0.3 (0.3 Se-SMC), 0.6 (0.6 0.9 (0.9 (sodium selenite; SENI) Se.During the experimental period, blood...
To examine the effects of Rhodobacter sphaeroides (R. sphaeroides) supplementation as a direct-fed microbial (DFM) on rumen fermentation in dairy cows and coenzyme Q10 (CoQ10) transition into milk, an vitro simulation batch culture vivo cow experiment were conducted. The characteristics ruminal investigated using fluids from six cannulated Holstein at 2 h post-afternoon feeding. A control treatment was included experiments based typified total mixed ration (TMR) for lactating cows, which...
South Korea has a temperate climate with four distinct seasons.However, summers are extremely hot and humid, which negatively affects industrial animal production.Hanwoo native cattle that have traditionally been raised in the natural environment of Korea.The present study investigated effects birth lactation season on weaning weights Hanwoo calves.Data were collected from 100 local breeding farms between 2016 2021.A total 56,970 (males, 29,530; females, 27,440) calves classified according...
Effects of Cordyceps militaris mycelia on rumen microbial fermentation were determined by measuring in vitro gas production, cellulose digestion and VFA concentrations.C. was added to buffered fluid with final concentrations 0.00, 0.10, 0.15, 0.20, 0.25 0.30 g/L incubation times for 3, 6, 9, 12, 24, 36, 48 72 h.At all times, the production showed a quadratic increase supplementation C. mycelia; maximum responses seen supplementation.However, significantly lower than from 9 h incubation.The...
An experiment was conducted to examine the effects of Cordyceps militaris mycelia on microbial populations and fibrolytic enzyme activities in vitro.C. added buffered rumen fluid with final concentrations 0.00, 0.10, 0.15, 0.20, 0.25 0.30 g/L incubation times were for 3, 6, 9, 12, 24, 36, 48 72 h.At all times, supplementation C. linearly increased number total viable celluloytic bacteria; maximum responses seen mycelia.The addition above level 0.20 significantly (p<0.01)increased...
본 연구는 이유 (생후 2개월) 전 농후사료 (무조사료) 급여가 한우 어린 송아지의 반추위 유두 발달에 미치는 영향을 조사하기 위하여 수행하였다. 총 24두 (수 12두, 암 12두)의 생후 6일령 어린송아지를 3처리구에 배치하였고, 각각 어미젖을 포유할 수 있는 시설에서 사육하였다. 처리구는 크게 농후사료구 (무조사료구)와 조사료구로 구분하였고, 농후사료구는 농후사료의 섭취량에 따른 발달 양상을 위하여, 사료섭취량을 기준으로 고농후사료급여구와 저농후사료급여구로 세분화하였다. 31~60일령의 1일 사료 섭취량은 고농후사료급여구 (380.2 g/d)가 저농후사료급여구 (76.9 g/d) 및 조사료구 (58.3 g/d)에 비하여 유의적 (P<0.05)으로 높았다. 저농후사료급여구의 사료섭취량은 큰 차이를 보였지만 생시체중 60일령 체중은 비슷하게 나타나, 성장에 부족한 영양분은 어미소의 포유로부터 충족된 것으로 사료되었다. 60일령의 체중 대비 무게의 비율은 (1.39%)가...
This study was conducted to investigate changes of blood metabolites and enzyme activities at different slaughter ages Hanwoo cattle. Blood samples were taken from six hundred thirty two steers (24~33 months age) one twenty eight bulls (17~24 by venipuncture caudal vein immediately prior slaughter. Glucose concentrations linearly increased (P<0.001) with increases the age in steers, urea nitrogen (BUN) decreased steers. Likewise, glucose albumin (P=0.009 P<0.001, respectively) age. BUN,...
Recently, summer temperatures have frequently been abnormal in Korea owing to global warming. In summer, a decrease feed intake rate and biological activity were observed Hanwoo (Korean Native Cattle), leading lower production rates the industry. However, precise scale of damage was not reported as with other animals economic value. This study conducted investigate effects birth season on weight Hanwoo. Data collected from 100 local breeding farms 2016 2019. A total 41,081 calves classified...
The present study was conducted to examine the effects of different plant oils or oil mixtures and high-temperature, microtime processing (HTMT) on CLA content in Hanwoo steers. Experiment 1, consisting 3 vitro trials, determine how biohydrogenation C18 fatty acids production were affected by fat sources (tallow, soybean oil, linseed oil) HTMT treatment rumen fluid. results showed that capable protecting unsaturated from ruminal bacteria. HTMT-treated diet containing 4% (LU) a supplement 2%...
본 연구는 체계적인 송아지 사양관리 대책을 수립하기 위해 필요한 자료를 제공하기 위한 목적으로 농가에서 실시하고 있는 이유전 한우 송아지의 현황을 조사하였다. 설문은 전국의 가임암소를 사육하고 농가를 대상으로 도별 농가수 편차가 크게 발생하지 않는 범위에서 임의로 선출하여 방문 총 조사된 농가수는 862농가로, 경기 및 제주를 제외하고는 전 지역(7개 도)에서 비교적 비슷한 농가수가 조사되었으며, 사육두수 규모별 분포는 200두 이상 사육농가가 10.7%로 가장 낮았으나, 이를 제외한 나머지 50두 이하, 51-100두 101-200두 규모 농가의 비율은 비슷하게 조사되었다. 과반수이상(50.6%)의 농가가 생후 6-10일령에 스타터사료 급여를 실시하는 것으로 조사되어 빠른 시기에 스타터를 급여하고 나타났다. 3일에 한번 교체하는 비율이 30.1%로서 높게 나타났으며, 1회/1주일 교체농가(19.2%)의 비율도 1일 1회 교체농가의 비율(18.8%) 보다 높아, 신선한 위해서...