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http://dx.doi.org/10.14578/jkfs.2014.103.1.65

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

Yoon, Jun Hyuck (Southern Forest Resources Research Center, Korea Forest Research Institute)
Jeon, Kwon Seok (Southern Forest Resources Research Center, Korea Forest Research Institute)
Song, Ki Seon (Southern Forest Resources Research Center, Korea Forest Research Institute)
Park, Yong Bae (Southern Forest Resources Research Center, Korea Forest Research Institute)
Moon, Yong Sun (Department of Horticulture and Life Science, Yeungnam University)
Lee, Do Hyung (Department of Forest Resources, Yeungnam University)
Publication Information
Journal of Korean Society of Forest Science / v.103, no.1, 2014 , pp. 65-71 More about this Journal
Abstract
Cacalia firma is a perennial plant in Asteraceae, Parasenecio that distributed in Korea, China, and Japan. As dietary style changes for well-being life, consumer's demand of functional food and organic vegetables is getting increased. This study was conducted to investigate the optimum light conditions of P. firmus in forest farming. One year old seedlings were grown under four different light conditions 10%, 20%, 30%, and 50% of sunlight by shading (equals 50%, 30%, 20%, and 10% relative brightness respectively) and non-treated control under full sunlight. They were analyzed for early growth and physiological response. Seedlings grown under 75% shading showed similar height, root growth, and leaf water content to control. However, their leaf length, width, and total leaf area were increased, which caused increased leaf dry weight and total dry weight. Especially, seedlings under 95% shading showed 40% increase in height and more leaf growth and leaf water content, although they had shorter main root length and root collar diameter than control. In addition specific leaf area (SLA) and leaf area ratio (LAR) were higher than control and indicated that they were statistically significant difference from control. Higher SLA refers thinner leaf thickness, higher LAR means larger leaf area. The results indicate seedlings under 95% shading have higher water content, thinner leaf, and wider lightinterception areas. It is plausible that P. firmus is active in chlorophyll activities and carbon dioxide assimilation at even lower light conditions. These results suggest that the optimum light level of P. firmus for artificial cultivation in forest farming 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 and higher yield. We suggest these results as basic data of P. firmus for possible forest farming.
Keywords
Cacalia firma; forest farming; shading conditions; growth; artificial cultivation;
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