원예용 상토와 제지 슬러지의 혼합비율에 따른 상추의 생육반응

This study was conducted to investigate the impact of paper mill sludges substrates on the growth responses of lettuce that are commonly chosen by people. Lettuces (Lactuca sativa 'Seonmang jeokchukmyun') were potted and grown for 6 weeks with four different mixing ratio of horticultural substrate and paper mill sludge (8:2, 6:4, 4:6 and 2:8) in a greenhouse. As results, 8:2 was the most effective mixing ratio for the growth of lettuce. This mixing ratio showed significant differences in all categories of plant height, leaf length, leaf width, leaf area and biomass. 6:4 mixing ratio had a growing problem at an early stage and recovered later. 4:6 and 2:8 mixing ratios did not affect its growth.