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Rice Growth Response and Soil Quality by Domestic Wastewater Irrigation on Rice Paddy Field - Lysimeter experiment -  

Cho, Jae-Young (Division of Biotechnology, Chonbuk National University)
Park, Seung-Woo (Department of Landscape Architecture and Rural System Engineering, Seoul National University)
Son, Jae-Gwon (Department of Agricultural Engineering, Chonbuk National University)
Park, Bong-Ju (nstitute of Natural Science, Konkuk University)
Li, Long-Gen (Department of Crop Production and Technology, Chonbuk National University)
Publication Information
Journal of Korean Society of Rural Planning / v.12, no.2, 2006 , pp. 49-56 More about this Journal
Abstract
The application of domestic wastewater on rice paddies results in the accumulation of sodium(Na$^+$) to the soil. Excessive concentration of sodium may cause the deterioration of the physical characteristics of the soil, change in the osmosis of the soil, destruction of soil aggregates as well as ion toxicity due to sodium accumulation. Using domestic wastewater as irrigation water should be preceded by measures to prevent or control the soil salinization caused by sodium. Agricultural reuse of domestic wastewater were found not to cause serious problems with food safety due to heavy metals. However, pre-treatment using ultraviolet or ozone is recommended to reduce the number of bacteria and gem and for public health reasons. Using domestic wastewater has shown that reducing the standard application of chemical fertilizers by as much as 50% reduced the harvesting index by only 10%. This study has shown that it is feasible to reuse domestic wastewater on rice paddies. In order to facilitate the application, it is deemed necessary to establish wastewater treatment technologies in the future, to review criteria for recycling domestic wastewater for agricultural purposes such as conditions of soil and cropping system and to resolve conflicts with farmers and public health issues.
Keywords
Agricultural water; Domestic wastewater; Rice paddy field; Salinization;
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