Earticle

이 연구는 재선충 적치 감염목이 산불확산 요인으로 작용할 수 있음을 인식하고, 비감염목과 감염목의 수분함 량에 따라 착화시간과 연소열을 실험·분석하였다. 실험에 사용한 시료는 비감염목과 감염목의 수간부로 한정하였다. 비감염목 수분함량은 26.27%, 감염목 수분함량은 평균 20.03%로써 6.24% 차이를 보였다. 또한, 비감염목과 감염목의 기간별 평균 연소열은 각각 5,017.33 kcal/kg, 4,762.00 kcal/kg로 분석되었다. 비감염목의 수분함량이 26.27%에서 착화시간은 16초였으며 감염목의 평균 착화시간은 평균 수분함량 20.03%에서 9.80초 로 분석되었다. 수분함량 감소에 따라 착화시간은 짧아졌으며, 연소열은 미세하게 감소하는 경향을 보였다. 분석결과 적치 감염목이 징검다리형 수직적 산불화재의 확산 위험인자임을 확인할 수 있었다.

This study compared and analyzed the combustion characteristics of infected and non-infected trees through ignition time and combustion heat tests according to moisture content under the premise that stockpiled infected pine trees could act as a factor for forest fire spread. The samples used in the experiment were limited to the stems of uninfected and infected trees. The moisture content of non-infected trees was 26.27% and the average moisture content of infected trees was 20.03%, showing a difference of 6.24%. In addition, the average heat of combustion for each period of uninfected and infected trees was analyzed to be 5,017.33 kcal/kg and 4,762.00 kcal/kg, respectively. The average ignition time of uninfected trees was 16 seconds when the moisture content was 26.27%, and the average ignition time of infected trees was 9.80 seconds when the average moisture content was 20.03%. As the moisture content decreased, the ignition time was shortened, and the heat of combustion showed a tendency to decrease slightly. As a result of the analysis, it was confirmed that the infected trees in the stockpiling were a risk factor for the spread of stepping-stone-type vertical forest fires.

송이는 세계적으로 상용 가치가 높은 버섯이나, 아직까지 자연 채취에 의존하고 있다. 현재까지 송이 감염묘를 통해 송이를 한 개씩 발생시키는 것까지는 한국과 일본에서 성공하였다. 본 연구에서는 송이 감염묘법에서 송이균이 생존할 수 있는 소나무의 최소 크기를 결정하고자 하였다. 송이 감염묘에서 송이균이 생존한 것은 이식 2년째에 14본(50%)과 이식 1년째에 10본(71%)이었다. 이식 후 송이균이 생존한 송이 감염묘는 이식 당시 평균 수고가 25 cm (최소 12 cm ~ 최대 40 cm) 였다. 결론적으로 송이 감염묘의 수고가 최소 12 cm 이상이 되면, 야외 조건에서 송이균이 생존할 수 있을 것으로 판단되었다. 이 결과는 기존의 송이 감염묘에서 사용하는 기주식물의 크기를 획기적으로 줄여 송이 감염묘 방법을 개선하였고, 송이 인공재배를 위해 어느 정도 크기의 소나무를 활용하는 것이 좋을 지의 기준을 제시하였다.

Despite the high commercial value of the pine mushroom (Tricholoma matsutake) around the world, its production still depends upon natural harvesting. In recent years, mushroom researchers in Korea and Japan have been successful in artificially cultivating T. matsutake by producing single mushroom through matsutake-infected pine seedlings. In this study, we determined the minimum seedling height required for the survival of matsutake mycelia in the infected pine seedlings in the field. The survival rate of matsutake mycelia in the matsutake-infected pine seedlings was 50% (14) in two years and 71% (10) in one year after their transplantation. The average height at time of transplantation of the matsutake-infected pine seedlings that bore surviving mycelia after transplantation was 25 cm (minimum 12 cm to maximum 40 cm). In conclusion, the matsutake mycelium of matsutake-infected pine seedlings was able to survive in field conditions if the height of the seedling at the time of T. matsutake infection was at least 12 cm. These results suggest that the height of the host plants used in conventional matsutake-infected pine seedling production should be greatly reduced to improve the matsutake cultivation. Therefore, standardization of the seedling height for artificial cultivation of pine mushrooms by the matsutake-infected pine seedling method is suggested.