완효성비료 시비구에서의 농도특성(지역환경 \circled3)

Characteristics of Concentration by Slow Release Fertilizer in Paddy Plots

The effect of slow release fertilizer application on ponded and percolation water in paddies were evaluated at the experimental plots during irrigation period. We laid out three experimental plots such as standard, 100% slow-release and 80% slow-release. For ponded water, the concentrations of T-N in slow-release plots slowly increase after fertilizing and decrease slowly. The concentration of COD in percolated water was independent of the type of plots. Amount of nitrogen uptake of rice plant in a standard plot was highest at the middle or end of July and was higher than the other plots.