Behavior Characteristic Analysis of Animal Liquid Manure and Urea in the Rice Field Using an Fugacity-based Multimedia Environmental Fate Model

서지정보

· 발행기관 : 한국환경기술학회
· 수록지 정보 : 한국환경기술학회지 / 18권 / 6호 / 546 ~ 562페이지
· 저자명 : 김미숙, 오원규, 곽동희

초록

Examination of liquid manure’s potential environmental risks is urgently needed while it is attracting growing interest as a substitute for chemical fertilizer. To examine the fate of N component in animal liquid manure (ALM) and diagnose the current extent of environmental risk caused by ALM, this study compares the effects of ALM and N-typed commercial fertilizer, urea, by using a fugacity-based multimedia environmental fate (FMEF) Model. As N-nutrient in ALM, is a high soluble, non-volatile and ionic compound, the FMEF model may be proper rather than the general model but this study used the fugacity-based for simplification although it has uncertainty of model formulae, input information, and so on. For ALM and urea under the same simulation conditions during rice-cropping, simulation determined effect of ALM on air and groundwater and accumulation of urea in water of a rice field. Urea indicated sensitivity of water and a high uptake by rice plants. Rice plants absorbed a low amount of ALM but a high amount of ALM distributed in environment compartments. For sensitivity of rainfall, most of ALM were absorbed by rice plants and urea and partial ALM reached groundwater as fast as rainfall increased with 20.5 mm, 90 mm, and 200 mm. The results of this study revealed that FMEF model were useful for understanding the potential environmental risks of liquid manure and the behavior of liquid manure’s nitrogen to provide the basic scientific grounds for preventing the negative influence of liquid manure in advance.

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