INFLUENCE OF PLOW PAN ON ENRICHMENT AND DEPLETION OF HEAVY METALS IN SURFACE SOILS

摘要

Hydropedology is a new discipline that uses pedologi-cal information to understand soil water movement, and thus the storage, transformation, and transportation of heavy metals (HMs). However, limited studies have investigated how the hydropedological feature, for example, water-restrictive soil horizons, would affect the enrichment of HMs in soils. This study investigated the influence of soil properties on the enrichment and depletion of HMs using the data of 27 soil profiles opened in five study areas in Jiangsu, China. The enrichment or depletion of HMs in the Apl horizon was estimated using the concentration differences of HMs between surface Apl and subsurface Bl (or B) horizons. The great Apl sand content (SC) significantly (p<0.1) elevated the depletion of Pb in the Apl horizon (r~2=O.13), while the great Apl and Ap2 clay content (CC) significantly (p