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(Cacalia firma)        , ,  .               .          1    4  25%, 55%, 75% 95% ( 50%, 30%, 20%, 10% ) ()      ·. 75%    ,   ,  ,        .  95%        ,   40%       . (specific leaf area; SLA) (leaf area ratio; LAR)               .           .         75~95%( 10~20%) ,      75%          .           .Abstract: Cacalia firma is a perennial plant in Asteraceae , Parasenecio that distributed in Korea, China, and Japan. Asdietary style changes for well-being life, consumer’s demand of functional food and organic vegetables is gettingincreased. This study was conducted to investigate the optimum light conditions of P. firmus in forest farming. One yearold seedlings were grown under four different light conditions 10%, 20%, 30%, and 50% of sunlight by shading (equals50%, 30%, 20%, and 10% relative brightness respectively) and non-treated control under full sunlight. They wereanalyzed for early growth and physiological response. Seedlings grown under 75% shading showed similar height, rootgrowth, and leaf water content to control. However, their leaf length, width, and total leaf area were increased, whichcaused increased leaf dry weight and total dry weight. Especially, seedlings under 95% shading showed 40% increase inheight and more leaf growth and leaf water content, although they had shorter main root length and root collar diameterthan control. In addition specific leaf area (SLA) and leaf area ratio (LAR) were higher than control and indicated thatthey were statistically significant difference from control. Higher SLA refers thinner leaf thickness, higher LAR meanslarger leaf area. The results indicate seedlings under 95% shading have higher water content, thinner leaf, and wider light-interception areas. It is plausible that P. firmus is active in chlorophyll activities and carbon dioxide assimilation at evenlower light conditions. These results suggest that the optimum light level of P. firmus for artificial cultivation in forestfarming ranges from 75~95% shading (20%-10% of relative brightness). When salability as ‘sanchae’ (wild edible greens)is considered, P. firmus could be cultivated under 75% shading in forest farming and expected to have better taste andhigher yield. We suggest these results as basic data of P. firmus for possible forest farming.Key words

The Growth and Physiological Responses of Cacalia firma Seedlings by Shading Conditions in Forest Farming