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Effects of Irrigation Methods of Deep Sea Water on the Growth of Plug Seedlings  

Hong Sung-Yu (Department of Horticulture, College of Agriculture and Life Sciences, Kangwon National University)
Yoon Byeong-Sung (Department of Horticulture, College of Agriculture and Life Sciences, Kangwon National University)
Kang Won-Hee (Department of Horticulture, College of Agriculture and Life Sciences, Kangwon National University)
Publication Information
Journal of Bio-Environment Control / v.15, no.2, 2006 , pp. 156-161 More about this Journal
Abstract
Overhead and sub-irrigation of deep sea water to tomato seedlings reduced the height as 50% and 58% than control plants. In the same treatment with surface sea water and NaCl water, the reduced rate in tomato seedlings' height were 49% and 56% in overhead irrigation, and 47% and 57% in sub-irrigation, respectively. Most effective method for the inhibition of the growth of the seedling was sub-irrigation method, which supplied water through the roots. No significant difference was observed on fresh weight of the upper part of tomato and cucumber seedlings, though the sub-irrigation reduced the fresh weight than the overhead irrigation. The reduced rate of fresh weight of seedlings by overhead irrigation was by 38% and sub-irrigation by 49% as compared to control. Similarly dry weight of upper and under soil parts of seedlings showed same trend of results thereof as fresh weight. This result can be traced to reduction of growth caused by salts in the water. In stem diameter of seedlings no significant difference was observed between two irrigation methods, even though both deep sea and NaCl water reduced stem diameter, as compared to control water. Overhead irrigation can be chosen by seedling producers because of better seedling quality by using TH ratio. Seedling compactness were not noticed in both the overhead and sub-irrigation. Sub-irrigation was found more effective method far the inhibition of height and compactness of tomato seedlings. Higher the concentration of NaCl, deep sea, and surface sea water, lesser the growth in height, fresh and dry weight, stem diameter, and leaf area was obtained. No significant difference was found, though sub-irrigation suppress the growth of seedlings.
Keywords
cucumber; NaCl water; overhead irrigation; sub-irrigation; surface sea water; tomato;
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