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Use of Drainage Water as Irrigation Resource in the Paddy Field to Mitigate Non-point Source Pollutants
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 Title & Authors
Use of Drainage Water as Irrigation Resource in the Paddy Field to Mitigate Non-point Source Pollutants
Kim, Choon-Song; Ko, Jee-Yeon; Lee, Jae-Saeng; Jung, Ki-Yeol; Park, Sung-Tae; Ku, Yeon-Chung; Kang, Hang-Won;
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Objective of this study was to assess the efficient rice cultivation practice to mitigate the non-point source pollutants loading to the adjacent watershed. Cultivation practices consisted of machine transplanting, direct seeding on dry paddy, and no tillage in which no fertilizer and pesticide were applied to paddy field. Water in drainage canal was used as irrigation source during the entire rice growing season. Loading of the non-point source pollutants to the adjacent small stream was mitigated by all treatments. Rice yield, total biomass (rice + weeds), and uptake T-N, , and were higher in machine transplanting practice than those in direct seeding and no tillage practices. However, the purification effects of non-point source pollutants were followed in orders of no tillage > direct seeding > machine transplanting due to quantity of irrigation water. The annual purification quantity of T-N, T-P, and K by rice cultivations ranged from 46 to 369 kg , 4.1 to 16.4 kg , and 55 to 238 kg , respectively, during the entire rice growing season. Results revealed that no tillage practice of rice cultivation was the best management option in reducing the loading of the non-point source pollutants from the drainage canal into stream.
water purification;non-point source pollutants;water of drainage canal;rice;no tillage;
 Cited by
도시지역 비점오염물질 저감을 위한 인공습지의 효율평가,문대헌;이일국;김지태;장순웅;

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