Tsvetnova O B, Shcheglov A I
Radiats Biol Radioecol. 2009 Mar-Apr;49(2):158-65.
In remote period after the radioactive fallout the biological cycle of 137Cs in pine forests of northern forest-steppe zone and Bryanskoe Polissye become different. In pine forests (northern forest-steppe zone) with dark grey forest soil 137Cs flux to the soil with litterfall exceeds its influx to the vegetation by a factor of 5. Thus biological cycle of 137Cs differs from the cycle of stable K and till now its main characteristic feature is domination of 137Cs flux to the soil with litterfall. In pine forests (Bryanskoe Polissye zone) with podzolic illuvialiron sandy soil annual 137Cs influx to above-ground vegetation via root uptake exceeds its return to the soil with litterfall. Under these conditions biological cycle of 137Cs approaches it to the biological cycle of stable K.
在放射性沉降物后的遥远时期，北方森林草原带和布良斯克森林草原的松树林中137Cs的生物循环变得不同。在具有暗灰色森林土壤的北方森林草原带松树林中，通过凋落物进入土壤的137Cs通量超过其进入植被的通量5倍。因此，137Cs的生物循环不同于稳定钾的循环，到目前为止，其主要特征是通过凋落物进入土壤的137Cs通量占主导。在具有灰化淀积铁砂土的布良斯克森林草原带松树林中，每年通过根系吸收进入地上植被的137Cs通量超过其通过凋落物返回土壤的通量。在这些条件下，137Cs的生物循环使其接近稳定钾的生物循环。
