The Distribution and Migration of 137Cs in Oak (Quercus serrata) and Cedar (Cryptomeria japonica) Forest Organic Fractions

To analyse the 137Cs distribution and migration under various fractions of organic matter layers, this study investigated easily recognizable, originally shaped L-fractions, not early fermented fragmented F-fractions, both oak (Quercus serrata) cedar (Cryptomeria japonica) sampled from Osawa watershed sites at Nihonmatsu City, Fukushima Prefecture, Japan. The materials were put on top soil columns Field Museum (FM) Tamakyuryo in Hachioji Tokyo. vertical forest profiles was analyzed using relaxation mass depth, ho (kg m?2). Soil with L F- layer cedar, labelled as Oak-L, Oak-F, Cedar-L Cedar-F four replications (n = 16), set up by laboratory column-based method kept five months’ incubation period. after depths 0–1 cm, 1–2 2–5 cm 5–10 cm. Results inventory showed that 86% (oak cedar) total accumulated within F-layer, indicating transformation litter is a huge source for potentially mobile 137Cs, especially F-layer (67% inventory) further continuous transfer into mineral layers. A higher treated soils (Oak-L Cedar-L) compared to F treatments implied low amounts penetrated faster deeper due their water-soluble nature. Furthermore, 24.3 kg m?2 than Oak-F ho, 14.0 m?2, significant positive relationship between retention carbon (TC) (p < 0.05) suggested influence penetration retention. C/N (carbon nitrogen ratio) results revealed high including observed Cedar-F, which decomposition does advance, penetrates while fraction C/N, advanced release held adsorption unto RIP (radiocesium interception potential) surface. In addition, infiltration water transportation process largely downward lower Cedar-F.