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    Impact of different water supply levels on yield and biochemical ingredients in broccoli
    (2013) Erken, O.; Oztokat Kuzucu, Canan; Cakir, R.
    This research was conducted to determine the impacts of different water supply levels on the yield and biochemical ingredients of the broccoli plant during the 2008 and 2009 growing seasons under the environmental conditions of Canakkale province, Turkey. The Maraton broccoli (Brassica oleracea L. var. Italica) species was grown in 10 lt pots with five different irrigation levels (80%, 60%, 40%, 20%), including the control treatment (100%), where the total quantity of moisture deficiency was replenished with each irrigation application. The results show there was a decline in yield parallel to the reduction in amount of irrigation water. During the first and second years of the research, the respective yields obtained were between 667.84 - 101.68 g plant-1 and 775.87 - 109.29 g plant-1. Data on the total leaf surface area, electrolytic conductivity of the tissues, and amount of sulfur and proline were also determined and used to estimate the water-yield, irrigation water-proline and irrigation water-sulfur interactions.
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    Yield and quality compounds of white cabbage (Brassica oleracea L. cv. capitata) under different irrigation levels
    (Tarbiat Modares University, 2019) Erken, O.; Yildirim, M.
    This study was conducted in field conditions to determine the response of cabbage to four different irrigation levels, from 2015 to 2016. The experiment was laid out in randomized block design. Plots were irrigated using a drip irrigation system and the irrigation interval was fixed as 4 days for all treatments. Evaporation was determined by Class-A pan. Six organic acids (ascorbic, tartaric, lactic, citric, malic and oxalic) were identified and quantified by HPLC-UV. White cabbage yields were significantly increased by water applications, but deficit irrigation produced negative results. Maximum amounts of ascorbic, lactic, tartaric and malic acids were found in the low water content treatment, while reducing sugar and total sugar increased in the full irrigation treatment. In the study, supplying different amounts of irrigation water caused changes in the growth and quality of white cabbage (Brassica oleracea L.cv. Capitata). When water stress in cabbage production exceeded more than 30%, the yield and, especially, the quality of cabbage decreased significantly. The results revealed evidence that different soil moisture content in the root depth affected the yield, organic acids, and sugar content. © 2019, Tarbiat Modares University. All rights reserved.
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    Yield and Quality Compounds of White Cabbage (Brassica oleracea L. cv. Capitata) under Different Irrigation Levels
    (Tarbiat Modares Univ, 2019) Erken, O.; Yildirim, M.
    This study was conducted in field conditions to determine the response of cabbage to four different irrigation levels, from 2015 to 2016. The experiment was laid out in randomized block design. Plots were irrigated using a drip irrigation system and the irrigation interval was fixed as 4 days for all treatments. Evaporation was determined by Class-A pan. Six organic acids (ascorbic, tartaric, lactic, citric, malic and oxalic) were identified and quantified by HPLC-UV. White cabbage yields were significantly increased by water applications, but deficit irrigation produced negative results. Maximum amounts of ascorbic, lactic, tartaric and malic acids were found in the low water content treatment, while reducing sugar and total sugar increased in the full irrigation treatment. In the study, supplying different amounts of irrigation water caused changes in the growth and quality of white cabbage (Brassica oleracea L.cv. Capitata). When water stress in cabbage production exceeded more than 30%, the yield and, especially, the quality of cabbage decreased significantly. The results revealed evidence that different soil moisture content in the root depth affected the yield, organic acids, and sugar content.