돈분액비 토양침투율과 토양내 분포 특성

BACKGROUND: Increase in application of liquid pigmanure(LPM) in agriculture as nutritional source hasbecome a social issue due to its influence on water quality. Also, proper application methods have not been developedwith respect to indigenous properties of LPM and soilphysical properties. Therefore, we conducted thisexperiment to observe the infiltration characteristics anddistribution of dissolved organic compounds of LPM insoils having different soil textures. METHODS AND RESULTS: To do this experiment, wecollected three different soils and LPM. We analyzed thephysical and chemical properties of both soils and LPM todetermine the dilution ratios of LPM. The LPM diluted to 4different ratios with distilled water was applied to the top ofsoil column. Infiltration rates were observed by time anddepth until the amount of effluent collected from the bottomof the soil columns were stabilized while maintaining thehydraulic head 3 cm above the soil column. The resultsshowed that infiltration rates increased with increasingdilution ratios in the order of sandy, loamy sand, and sandyloam> The time required to reach steady state was increasedwith decreasing sand contents clay. CONCLUSION: The size and amount of the dissolvedorganic compounds in LPM that can determine theefficiency as fertilizer and environmental problems asnonpoint pollution source in water quality have not beeninvestigated with respect to behavior and transport of themin soil. Therefore, it requires further research how we canproperly apply LPM as valuable fertilizer substitute forinorganic fertilizers.