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Effects on Water Quality and Rice Growth to Irrigation of Discharge Water from Municipal Waste Treatment Plant in Rice Paddy during Drought Periods
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 Title & Authors
Effects on Water Quality and Rice Growth to Irrigation of Discharge Water from Municipal Waste Treatment Plant in Rice Paddy during Drought Periods
Shin, Joung-Du; Lee, Jong-Sik; Kim, Won-Il; Jung, Goo-Bok; Kim, Jin-Ho; Yun, Sun-Gang; Choi, Chul-Mann;
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Objective of this study was to access the environmental impacts of the use of discharge water from municipal waste water treatment plant as alternative irrigation resources during drought season for rice cultivation. For the field experiments, it was observed that plant growth and yield characteristics at 20 days of alternative irrigation period with application of FAST (fertilizer application based on soil test) 50% were relatively the same as the control. For the surface water quality, it appeared that (electrical conductivity of irrigation water) and SAR (sodium adsorption ratio) values of DMWT (discharge waters from municipal wastewater treatment plant) irrigation were twofold higher than those of ground water irrigation as the control regardless of fertilization levels. For the irrigation periods, there were not significantly difference between 10 and 20 days of treatments, but and SAR values of surface water were highest at 30 days of irrigation periods at initial rice growing stages. Generally, values of percolation water in all the treatments were gradually increasing until 30days after irrigation, and then decreasing to harvest stage. Overall, it might be considered that there was possibility to irrigate DMWT with application of FAST 50% for 20 days of drought periods at rice transplanting season. Furthermore, efficiency rate of alternative irrigation water for 20 days of drought period was 32.7% relative to the total annual irrigation water for rice cultivation.
Alternative irrigation water;discharge water from municipal wastewater treatment plant;sodium adsorption ratio;
 Cited by
하수처리장별 총인 시설계 슬러지의 인 흡착능 비교,서정인;권대원;

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