Yield and Antioxidant Activity of Vegetable Crops Under Salt Affected Greenhouse Soil in Saemangeum Reclaimed Land
2018
Jang, H., National Institute of Crop Sciences, RDA, Wanju, Republic of Korea | Youn, J.T., National Institute of Crop Sciences, RDA, Wanju, Republic of Korea | Ahu, S., National Institute of Crop Sciences, RDA, Wanju, Republic of Korea | Kim, U.H., National Institute of Crop Sciences, RDA, Wanju, Republic of Korea | Choi, W.Y., National Institute of Crop Sciences, RDA, Wanju, Republic of Korea | Bae, H.S., National Institute of Crop Sciences, RDA, Wanju, Republic of Korea
This study was conducted to examine the yield and antioxidant activity of vegetable crops under the salt affected greenhouse soil in order to evaluate the possibility of greenhouse farming in "Saemangeum reclaimed land". Field experiment was conducted on a sandy loam soil and four different vegetable crops, Swiss chard (Beta vulgaris L.), Kale (Brassica oleracea ver. acephala), Red mustard (Brassica juncea L.), and Endive (Cichorium endivia L.) were cultivated. In the third year of the experiment, the soil salinity dramatically increased up to 23.5 dS m-¹ from 2.2 dS m-¹ in the first year of the experiment due to the resalinization of soil. The cumulative yield was 2,675 kg 10a-1 (Endive) greater than 2,560 kg 10a-1 (Red mustard) greater than 1,819 kg 10a-¹ (Kale) greater than 1,795 kg 10a-¹ (Swiss chard). Yield was inversely correlated with soil salinity (R² = 0.71-0.77) but the red mustard was not significantly correlated with soil salinity. Both DPPH free radical activity and total phenol content were higher with red mustard. K/Naleaves ratio as an indication of the salt tolerance was in the order of Red mustard greater than Endive greater than or equal to Swiss chard greater than or equal to Kale.
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