EFFECT OF VERMICULTURE ON REDUCTION OF NUTRENTS IN DRAINAGE WATER FROM FARMLAND

摘要

Generally, the concentration non-point pollution from agricultural is lower than point source,but it refl ects a high proportion in the total pollutant load in watershed because of the enormousfl ow from non-point site.In the Young-san river basin, the pollutant load from paddy fi eld depends on storm period, butannual changes in same watershed is notable. When forecasting the pollutant load of T-N/T-P.an application of uniform unit load is not suitable. So, the prediction of pollutant load is toconsider the storm period and the and non-storm period separately.In addition, earthworms reduced manure by about 51 % on the dry weight basis and reducedN, P and K of manure by 41, 50 and 60 %, respectively.The objectives of this study are to present a policy related with drainage water from paddy fi eldand contribute to control of nutrients in drainage water from farmland through vermiculture.