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 enormous fl ow from non-point site. In the Young-san river basin, the pollutant load from paddy fi eld depends on storm period, but annual 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 to consider the storm period and the and non-storm period separately. In addition, earthworms reduced manure by about 51 % on the dry weight basis and reduced N, 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 eld and contribute to control of nutrients in drainage water from farmland through vermiculture.