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http://dx.doi.org/10.7744/cnujas.2014.41.4.321

Photosynthetic characteristics and growth analysis of Angelica gigas according to different hydroponics methods  

Park, Jong-Seok (Deptment of Horticulture, Chungnam National University)
Kim, Sung-Jin (Deptment of Horticulture, Chungnam National University)
Kim, Hong-Ju (Deptment of Horticulture, Chungnam National University)
Choi, Jong-Myung (Deptment of Horticulture, Chungnam National University)
Lee, Gong-In (National Academy of Agricultural Science, RDA)
Publication Information
Korean Journal of Agricultural Science / v.41, no.4, 2014 , pp. 321-326 More about this Journal
Abstract
The aim of this study was to investigate which hydroponic system is the optimum for growth and photosynthetic characteristics of Angelica gigas during experiment. Angelica gigas 'Manchu' were sowed and managed under a growth room chamber. The environmental conditions (temperature $22^{\circ}C/18^{\circ}C$ (day/night), relative humidity 50-70%, photosynthetic photon flux density (PPFD) $120{\pm}6{\mu}mol\;m^{-2}s^{-1}$) were maintained for 3 weeks. Forty eight seedlings with 4-5 leaves were transplanted in deep flow technique (DFT), substrate, and spray culture systems [culture bed: 800 (L) ${\times}$ 800 (W) ${\times}$ 400 mm(H)] under $150{\pm}5{\mu}mol\;m^{-2}s^{-1}$ PPFD provided with fluorescence lamps and cultivated for 11 weeks. At the end of the experiment, fresh and dry weights, leaf lenghth and width, SPAD, root fresh, and dry weights, and root volume of Anglica gigas were measured. Photosynthetic rate of Anglica gigas were measured with portable photosynthesis systems to investigate optimum PPFD, $CO_2$ concentration, and air temperature conditions. Fresh and dry weights of Anglica gigas grown in substrate were significantly greater than DFT-treated, but there were not significant with spray treatment. Leaf photosynthesis of Anglica gigas showed the tendency to sharply increase as PPFD was increased from 50 to $200{\mu}mol\;m^{-2}s^{-1}$. Though $CO_2$ saturation point was around $1000-1200{\mu}mol\;mol^{-1}$, increase in air temperature from 16 to $26^{\circ}C$ did not quite affect photosynthesis of Anglica gigas. In conclusion, Anglica gigas may be optimally cultivated with a spray culture system as air temperature, PPFD, and $CO_2$ concentration for environment are controlled at $20{\pm}3^{\circ}C$, $150{\mu}mol\;m^{-2}s^{-1}$, and around $1000{\mu}mol\;mol^{-1}$ for mass production.
Keywords
PPFD; Photosynthesis; $CO_2$ concentration; Mass production;
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Times Cited By KSCI : 12  (Citation Analysis)
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