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Monitoring of Feed-Nutritional Components, Toxic Heavy Metals and Pesticide Residues in Mushroom Substrates According to Bottle Type and Vinyl Bag Type Cultivation

버섯의 봉지재배 및 병재배 시 재배단계별 배지의 사료영양적 성분, 독성중금속 및 잔류농약 모니터링

  • Kim, Y.I. (Animal Science, School of Life Resource and Environmental Sciences, College of Natural Sciences, Konkuk University) ;
  • Bae, J.S. (Animal Science, School of Life Resource and Environmental Sciences, College of Natural Sciences, Konkuk University) ;
  • Huh, J.W. (Kyonggi-do Institute of Health & Environment) ;
  • Kwak, W.S. (Animal Science, School of Life Resource and Environmental Sciences, College of Natural Sciences, Konkuk University)
  • 김영일 (건국대학교 자연과학대학 생명자원환경과학부 축산학전공) ;
  • 배지선 (건국대학교 자연과학대학 생명자원환경과학부 축산학전공) ;
  • 허정원 (경기도 보건환경연구원) ;
  • 곽완섭 (건국대학교 자연과학대학 생명자원환경과학부 축산학전공)
  • Published : 2007.02.28

Abstract

This study was carried out to monitor feed-nutritional components, toxic heavy metals (Cd, Pb and As) and pesticide residues through three cultivation stages (1st initial culture stage, 2nd mycelial growth stage, and 3rd fruit body-harvested stage) of king oyster mushroom (Pleurotus eryngii) produced by bottle type cultivation and oyster mushroom (Pleurotus osteratus) produced by vinyl bag type cultivation. For both cultivation types, compared with the initial culture, the weight reduction rate in spent mushroom substrates (SMS) after fruit body harvest was 29% for total wet mass, 21~25% for dry and organic matters and 19 ~22% for neutral detergent fiber. Two thirds to 3/4 of organic matter degraded and utilized by mycelia and fruit bodies was originated from fiber, of which the primary source (50~70%) was hemicellulose. The effect of mycelial growth stage on chemical compositional change in culture was little (P>0.05) for bottle type cultivation of king oyster mushroom but considerable (P<0.05) for vinyl type cultivation of oyster mushroom. Culture nutrients uptake by fruit bodies was very active for the bottle type cultivation. Compared with SMS, harvested fruit bodies (mushrooms) contained higher (P<0.05) crude protein, non-fibrous carbohydrate, and crude ash and lower (P<0.05) neutral detergent fiber. Regardless of stages, no culture samples were contaminated with toxic heavy metals and pesticide residues. In conclusion, the increase of fiber (neutral and acid detergent fibers) and indigestible protein contents and the decrease of true protein content in SMS indicated that the feed-nutritional value of SMS was significantly reduced compared with that of the initial culture and they were safe from toxic heavy metals and pesticide residues.

Keywords

Spent mushroom substrate;Spent mushroom compost;Mushroom;Byproduct;Recycling;Feed

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