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http://dx.doi.org/10.5389/KSAE.2006.48.3.097

Pollutant Concentrations at Experimental Paddy Plots during Irrigation Season  

Cho, Jae-Won (동문과학상사)
Kim, Jin-Soo (충북대학교 농업생명환경대학)
Oh, Kwang-Young (충북대학교 농업과학기술연구소)
Oh, Seung-Young (국립환경과학원 수질총량관리센터)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.48, no.3, 2006 , pp. 97-106 More about this Journal
Abstract
The pollutant concentrations at experimental paddy plots with three (excessive, standard, reduced) different fertilization rates were investigated during 2001-2002 irrigation seasons. Mean concentrations of pollutants in ponded water were not significantly different among three experimental plots, but the T-N concentrations in percolated water significantly depended on fertilization rates. The T-N, T-P and $COD_{Cr}$, concentrations in ponded water during early irrigation season (late May to mid-June) were much higher than those during later irrigation season likely due to fertilization and low uptake by young rice crops. The T-N concentrations decreased but the concentrations of T-P and $COD_{Cr}$, increased three days after tillering fertilization. The removal rates of T-N by paddy plots were $0.13-0.16g/m^2{\cdot}d$ for an excessive fertilization plot, $0.08-0.25g/m^2{\cdot}d$ for a standard fertilization plot, and $0.03-0.34g/m^2{\cdot}d$ for a reduced fertilization plot three days after tillering fertilization. On the other hand, T-P and $COD_{Cr}$, were released three days after tillering fertilization.
Keywords
Paddy field; Nitrogen; Phosphorous; Fertilization; Removal rate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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