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Effects of the Feeding Length of Spent Mushroom Composts from Selenium-Enriched Mushroom on Selenium Deposition in Finishing Hanwoo Steers

셀레늄강화 버섯폐배지의 급여기간이 거세한우의 조직내 셀레늄축적에 미치는 영향

  • Kim, W.Y. (Department of Animal Science, Korea National Agricultural College, RDA) ;
  • Lee, K.J. (Department of Animal Science, Korea National Agricultural College, RDA) ;
  • Nho, W.G. (Department of Animal Science, Korea National Agricultural College, RDA) ;
  • Lee, J.H. (Department of Animal Science, Korea National Agricultural College, RDA)
  • 김완영 (한국농업전문학교 축산학과) ;
  • 이기종 (한국농업전문학교 축산학과) ;
  • 노환국 (한국농업전문학교 축산학과) ;
  • 이장형 (한국농업전문학교 축산학과)
  • Published : 2005.03.30

Abstract

This study was carried out to determine effects of the feeding length of spent mushroom composts from selenium-enriched mushroom (Se-SMC) on muscular selenium deposition in finishing Hanwoo steers. A total of 30 steers were allotted to an experiment with a 3 × 2 factorial arrangement. Treatments were 2 groups of with and without Se-SMC at three different feeding lengths (2, 4, and 6 months) by body weight (BW). And then dry matter intake, body weight gain, Se concentration and/or content in blood and/or muscle were investigated. Dry matter intake was not affected by feeding length and Se-SMC supplementation. As the feeding length was prolonged, initial and final BW was significantly lowered (p<0.01) with no Se-SMC effect. However, total BW gain was significantly increased (p<0.0001) with increasing feeding length with no effect of Se-SMC. Se-SMC supplementation significantly increased Se concentration in whole blood, but there was no effect on feeding length. Se contents in muscles, especially hind-leg, were significantly increased (p<0.05) as the feeding length was increased. However, there was no difference for Se content between four and six months feeding groups of Se-SMC and also hepatic Se content was not affected by feeding length. On the contrast, hepatic Se content for Se-SMC group within each feeding length was significantly increased (p<0.001) compared with no Se-SMC supplementation. In conclusion, our results suggested that optimum feeding length of Se-SMC as a strategy for the production of Se-fortified beef might be approximately 4 months.

본 연구는 사료내 적정 셀레늄수준(0.9ppm)에서 Se-SMC(유기셀레늄강화버섯폐배지)의 급여사양기간(2개월, 4개월, 6개월)을 달리 했을 때, 비육후기 한우의 조직 내 셀레늄함량에 미치는 영향을 조사하여 최대포화축적기간을 제시하고자 실시하였다. Se-SMC 급여기간에 따른 비육후기 한우의 건물섭취량은 급여기간과 셀레늄수준에 의하여 처리구 간에 유의한 차이가 나타나지 않았고, 셀레늄이 사료섭취의 제한요인으로 나타나지 않았다. 또한, 사양시험 개시체중과 종료체중은 급여기간이 증가함에 따라 유의하게 낮았다(p<0.01). 하지만, 총 증체량은 급여기간이 증가함에 따라 유의하게 증가하였으나(P<0.0001), Se-SMC에 의한 효과 또한 나타나지 않았다. 한편, 사료내 셀레늄수준은 한우의 혈중 셀레늄농도를 유의하게 증가시켰으나(p<0.0001), 급여기간에 따른 효과는 나타나지 않았다. 등심내 셀레늄함량은 급여기간과 사료내 셀레늄수준에 의하여 유의한 효과가 나타나지 않았다. 후지내 셀레늄함량은 급여기간이 증가함에 따라 유의하게 증가하였으나(p<0.05), Se-SMC의 4개월 급여군과 6개월 급여군간에는 유의한 차이가 나타나지 않았다. 간내 셀레늄함량은 급여기간의 효과는 나타나지 않았지만, 셀레늄효과는 대조구에 비하여 유의하게 증가하였다(p<0.0001). 따라서, 본 연구에서 근육내 셀레늄에 대한 Se-SMC급여기간은 4개월 정도가 적당할 것으로 생각된다.

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