본 연구는 식물공장에서 청경채와 상추의 발아조건과 육묘배지 및 육묘 시 양액농도가 묘의 생육에 미치는 영향을 구명하고자 수행되었다. 청경채와 상추의 발아율은 광의 유무와 온도처리(15, 20, $25^{circ}C$) 간에 유의적 차이가 없었으나, 육묘배지 간에는 우레탄스펀지의 경우 파종 전 후 수분관리 유 무에 따라 큰 차이를 보였다. 즉, 우레탄스펀지 배지에서 파종전 후 수분관리를 하지 않았을 경우 암면에 비해 발아율이 현저히 낮았으나, 수분관리를 해주었을 때에는 암면보다 발아율이 높았으며, 묘의 생육도 암면과 차이가 없었다. 그리고 청경채의 생체중은 EC $1.0dS{cdot}m^{-1}$에서 $1.5dS{cdot}m^{-1}$에서보다 1.8배 무거웠고, $0.5dS{cdot}m^{-1}$에서보다는 6배 무거웠다. 상추의 생체중 또한 EC $1.0dS{cdot}m^{-1}$이 $1.5dS{cdot}m^{-1}$와 $0.5dS{cdot}m^{-1}$에 비해 1.7배와 3.5배 각각 무거웠다.
This experiment was conducted to study the effects of germination condition, nursery media and nutrient concentration in plant factory on the growth characteristics of pak-choi and lettuce seedlings. The results showed that temperature (15, 20, $25^{circ}C$) and light conditions (lighting and no lighting) had no significant effect on germination rate of pak-choi and lettuce, whereas the interaction of growing media (rockwool and urethane sponge) and moisture management before and after sowing had significant effect on germination percentage. In case of no moisture management before and after sowing, germination percentage was much higher in rockwool medium than urethane sponge medium. But germination percentage of urethane sponge was higher than that of rockwool with applying moisture before and after sowing. At the nutrient concentration of EC $1.0dS{cdot}m^{-1}$ the fresh weight of pak-choi was heavier than in EC 1.5 and $0.5dS{cdot}m^{-1}$ by 1.8 and 6.0 times, respectively. At the nutrient concentration of EC $1.0dS{cdot}m^{-1}$ the fresh weight of lettuce was also heavier than in EC 1.5 and $0.5dS{cdot}m^{-1}$ by 1.7 and 3.5 times, respectively.
