홍삼박을 이용한 병재배 느타리버섯의 첨가배지 개발

Development of new substrate using redginseng marc for bottle culture of oyster mushroom (Pleurotus ostreatus)

면실박을 대체하기 위하여 국내에서 유기성 폐자원으로 생산되는 홍삼박의 첨가량을 구명하기위하여 실험을 실시하였다. 홍삼박의 총 탄소함량은 45%, 총 질소함량은 2.7%이었으며, C/N율은 16.7이었다. 혼합배지의 이화학성 중 pH는 4.6~4.9이였으며, 총 질소함량은 2.5~2.8로 처리간에 뚜렷한 차이가 없었다. 홍삼박 첨가량에 따라 인산($P_2O_5$), 칼륨($K_2O$), 마그네슘(MgO)함량은 감소하였으나, 홍삼박만 20% 첨가시에는 오히려 증가하였다. 그러나 칼슘(CaO)함량은 홍삼박 첨가량에 따라 증가하였으나. 나트륨($Na_2O$)의 함량은 거의 변화가 없었다. 느타리버섯 균사 생육은 홍삼박의 첨가량이 증가할수록 균사생장 속도는 늦었으며, 자실체 수량은 면실박의 50%까지 첨가하여도 대조구와 뚜렷한 차이가 없었지만, 면실박 대신 홍삼박만 20%첨가시에는 수량이 급격하게 줄어들었다. 자실체 갓직경은 처리간에 뚜렷한 차이가 없었고, 대의 굵기는 홍삼박처리에서 조금 높았으나 길이에는 차이가 없었다. 수확기 갓의 색도를 측정한 결과 L값은 홍삼박첨가량에 따라 감소하였지만 a, b값은 처리간에 뚜렷한 차이가 없었다.

This study was carried out to investigated mixing ratio of redginseng marc using organic waste resource for production cost-reduction of oyster mushroom. Redginseng marc were examined as substitute of cottonseed meal which was primary nutritive material of mushroom growing substrate. Total nitrogen and carbon source of redginseng marc was 45% and 2.7%, respectively and C/N ratio was 16.7. Total nitrogen source and pH of substrate mixed with redginseng marc was 4.6~4.9 and 2.5~2.8, respectively. The contents of $P_2O_5$, $K_2O$ and MgO were decreased by increasing redginseng marc, but increased at the 20% redginseng marc. The contents of CaO was increased by increasing redginseng marc, but there was no significant difference in $Na_2O$ content. The more mixing ratio of redginseng marc was increased in column test, the more mycelial growth growed slowly. Yields of fruiting body was no significant difference compared with control group by adding of 10~50% redsingeng marc instead of cottonseed meal, but decreased sharply at only 20% redsingeng marc without cottonseed meal. The L value of pileus by increasing redginseng marc decreased during mushroom harvest, but there was no significant difference in the a-value and the b-value.