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Articles by Hong-Gu Lee
Total Records ( 2 ) for Hong-Gu Lee
  Sang-Bum Lee , Jintaek Im , Seon-Ku Kim , Youn-Chil Kim , Min-Jeung Kim , Jae-Seung Lee and Hong-Gu Lee
  This study was conducted to evaluate the effect of dietary Flammulina velutipes mycelium (FFVM) fermented with Bacillus subtilis A8-8 and Klebsiella sp. Sc on the performance of laying hens including the egg quality, the pathogenic bacterial (Escherichia coli and Salmonella spp.) counts in caecal contents and the NH3 production in excreta. One hundred eighty Hy-Line Brown hens were fed one of six diets, including a corn-soybean meal based control diet and control diets supplemented with FFVM at 1, 2, 3, 4, or 5% (n = 30 per experimental group). During the 5 week experimental period, laying hen performance, egg quality, pathogenic bacteria number in caecum and fecal NH3 gas production were estimated. Although there were no significant differences in egg production, feed intake and feed conversion among experimental groups, egg weight was significantly increased in the 1 and 3% FFVM groups compared with the control diet group (p<0.05). Interestingly, the 4% FFVM experimental group improved egg quality including albumen height, Haugh unit, egg shell weight and shell thickness, but not yolk color (p<0.05). On the other hand, the number of pathogenic bacteria such as Salmonella spp. and E. coli in caecum was significantly decreased by high levels of dietary FFVM supplementation (3-5%) (p<0.05). Early stage fecal NH3 gas production was also significantly suppressed by 3-5% dietary FFVM diets (p<0.05). Collectively, our results indicated that high level of dietary FFVM (4%) improves egg quality as well as suppressing pathogenic bacterial proliferation in the gastrointestinal tract and fecal NH3 gas emission.
  Sung-Heon Chung , Jae-Sung Lee , Min-Jeong Kim and Hong-Gu Lee
  Since the beginning of the 2000’s, the livestock industry of Korea has faced the need for paradigm shift from the existing quantitative growth to a sustainable qualitative growth, reflecting such changes in the domestic and international circumstances as the market liberation by FTA, the rise in international grain prices, the outbreak of a disease like the foot-and-mouth disease, the tightening of regulations on the livestock industry and the increasing demand for safe livestock products. For sustainable qualitative growth of the livestock industry, it is essential to support the upstream livestock industries such as feed industry, animal drug industry, livestock equipment and disease control. Therefore in this study, the current conditions of livestock and upstream industries of Korea are introduced focusing on the status of feed, cattle, swine and chicken industries and the expansion in overseas market on the basis of the plans to promote the development of future livestock industry in Republic of Korea (ROK).
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