Effects of Artificial CO2 Release in Soil on Chlorophyll Content and Growth of Pinus densiflora and Quercus variabilis Seedlings
2018
Kim, H.J., Korea University, Seoul, Republic of Korea | Han, S.H., Korea University, Seoul, Republic of Korea | Kim, S., Korea University, Seoul, Republic of Korea | Chang, H., Korea University, Seoul, Republic of Korea | Son, Y., Korea University, Seoul, Republic of Korea
This study was conducted to analyze the responses of chlorophyll contents and growth of Pinus densiflora and Quercus variabilis seedlings on distance from the well and CO2 flux after the artificial CO2 release. From June 1 to 30, 2016, CO2 gas was injected at the rate of 6 ℓ min-1 at the study site in Eumseong. Chlorophyll content was analyzed in the middle of July, 2016, and root collar diameter (RCD), height (H), and biomass were measured in May and December, 2016 after planting 2-year-old P. densiflora and 1-year-old Q. variabilis seedlings in May, 2015. The chlorophyll content of P. densiflora seedlings did not show a significant correlation with CO2 flux, whereas the chlorophyll content of Q. variabilis seedlings showed a significant negative correlation with increasing CO2 flux (P0.05). The RCD and H growth rates of both species showed the significant difference in the distance from the well of the CO2 anthropogenic release treatment. In particular, the RCD and H growth rate of P. densiflora seedlings and the RCD growth rate of Q. variabilis seedlings increased significantly as the seedlings were closer to the well, but the H growth rate of Q. variabilis seedlings decreased significantly. In addition, as the CO2 concentration in the ground increases, ΔR/S ratio increases in both species, suggesting that the high CO2 concentration in the soil promotes carbon distribution relative to the root part. The results of this study can be used as data necessary to monitor the CO2 leakage and physiological and growth responses of both species to leakage of stored CO2 in the future.
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