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KMID : 1134819980270030471
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Journal of the Korean Society of Food Science and Nutrition
1998 Volume.27 No. 3 p.471 ~ p.476
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Nitrate Content and Organophosphorus Pesticide Residues in Edible Part of Organic Farming Vegetables
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Park Young-Sook
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Abstract
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The N0₃^- contents and organophosphorus pesticide residues in edible part of vegetables cultivated by a conventional or an organic farming methods were determined. The N0₃^- contents of vegetables cultivated by the organic farming method were between 120ppm and 4,523ppm, whereas its contents of vegetables cultivated by the conventional farming method were between 89ppm and 1,575ppm. Fifty two percent of vegetables cultivated by the organic farming method accumulated N03~ content over than 2,000ppm, whereas 82% vegetables cultivated by the conventional farming method accumulated N0₃^- content below than 1,000ppm. The N0₃^- contents of lettuce dependent on the cultivation method obviously. The N0₃^- contents of lettuce cultivated by a hydroponic farming method were between 4,800 and 6,500ppm, whereas those cultivated by the conventional method were between 630 and 750ppm. The organophosphorus pesticide residues in edible part of vegetables cultivated by the conventional or the organic farming methods were not detected. The N0₃^- contents in edible part of vegetables cultivated by the organic farming method should be considered as one of several parameters to judge a real safe vegetable to be certified by government.
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KEYWORD
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NO3- content, organic farming, organophosphorus pesticide
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