Assessment on Yield Decrease of Kimchi Cabbage by Extreme Weather Conditions using Physiological Parameters
2018
Lee, H.J., National Institute of Horticultural and Herbal Science, Wanju, Republic of Korea | Lee, S.G., National Institute of Horticultural and Herbal Science, Wanju, Republic of Korea | Kim, S.K., National Institute of Horticultural and Herbal Science, Wanju, Republic of Korea | Park, S.T., National Institute of Horticultural and Herbal Science, Wanju, Republic of Korea
This study evaluated the effects of high air temperature and waterlogging duration on growth and yield of Kimchi cabbage. Air temperature treatments were applied with ventilation; optimal (set 20o C) and delayed (30o C) in the greenhouses. The waterlogging treatment levels were implicated 0, 12, 24, 48, and 72 hours, respectively. The growth of Kimchi cabbage was significantly affected by waterlogging duration. The head weight decreased by combining severe waterlogging and high air temperature. Net photosynthetic rate under the combination of non-waterlogging and optimal air temperature was 22.6 μmol CO2⋅m-2⋅s -1, which was the greatest, while that of 72 hours-waterlogging was rapidly decreased. The percentage of formality with 0, 12, and 24 hours-waterlogging was over 88%, however, those of 72 hours-waterlogging with optimal and delayed ventilation were 64 and 68%, respectively, which were dramatically reduced. The yields were more affected by waterlogging duration than air temperature treatment because of deducting as increased waterlogging periods. These results indicate that waterlogging treatment reduced the yield and quality of Kimchi cabbage, thus it will be feasible to enhance the harvest time when severe waterlogging in the field.
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