Thursday, November 16, 2006 - 9:00 AM
327-3

Land Use Effects on Carbon and Nitrogen Sequestration in Reclaimed Minesoils of Southeastern Ohio.

David Ussiri and Rattan Lal. School of Natural Resources, Ohio State Univ, Ohio State University, 2021 Coffey Rd, Columbus, OH 43210

Reclamation of mined soils could restore soil quality and ecosystem productivity and sequester C, but limited data exist with regard to the impact of post reclamation land use and management on soil organic carbon (SOC) storage in reclaimed minesoils (RMS).  A study was conducted to evaluate SOC and total nitrogen (TN) stocks (0-50 cm depth) and selected soil physical and chemical properties for reclaimed minesoils under different land uses namely: pasture, hay, meadow, and forest. The data suggest that removal of above ground biomass for hay or pasture had no impact on SOC accumulation in the grassland sites. Nearly 50% of the root biomass accumulated in the top 0- to 10-cm in the reclaimed grassland sites. The SOC content was strongly correlated with mean weight diameter(MWD)  and root biomass suggesting that both roots and aggregates play a significant role in SOC accumulation in RMS. Generally, managed grassland sites accumulated significantly more SOC and TN then the unmanaged forest in the RMS.

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