Plant and Soil

, Volume 344, Issue 1–2, pp 361–376

Soil properties associated with net nitrification following watershed conversion from Appalachian hardwoods to Norway spruce

  • Charlene N. Kelly
  • Stephen H. Schoenholtz
  • Mary Beth Adams
Regular Article

DOI: 10.1007/s11104-011-0755-5

Cite this article as:
Kelly, C.N., Schoenholtz, S.H. & Adams, M.B. Plant Soil (2011) 344: 361. doi:10.1007/s11104-011-0755-5

Abstract

Nitrate (NO3-N) in soil solution and streamwater can be an important vector of nitrogen (N) loss from forested watersheds, and nitrification is associated with negative consequences of soil acidification and eutrophication of aquatic ecosystems. The purpose of this study was to identify vegetation-mediated soil properties that may control potential net nitrification dynamics and to determine if net nitrification is a function of abiotic retention or biotic inhibition. We performed a soil inoculation and incubation study and analyzed a suite of soil chemical and biological properties in soils from a 40-year-old Appalachian hardwood forest and an adjacent 37-year-old Norway spruce forest converted from Appalachian hardwoods. Our results indicate that net NO3-N production was nine times higher in hardwood soil (mean = 183.51 mg N/kg/28 days) than in the spruce soil (mean = 18.97 mg N/kg/28 days) and differences in net NO3-N production were attributed to differences in soil substrate quality. Soil properties that were most strongly correlated with NO3-N production across vegetation types included total soil N, soil C:N ratio, oxalate concentration, and sulfate concentration. Establishment of a spruce monoculture in the central Appalachian hardwood ecoregion significantly altered N cycling, likely depleted soil N stores, increased soil acidity, and altered soil organic matter dynamics, thus leading to low net nitrification rates.

Keywords

Nitrification Norway spruce Appalachian hardwoods Fernow Experimental Forest Forest conversion Soil organic matter 

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Charlene N. Kelly
    • 1
  • Stephen H. Schoenholtz
    • 2
  • Mary Beth Adams
    • 3
  1. 1.Department of Forest Resources and Environmental ConservationVirginia Polytechnic Institute and State UniversityBlacksburgUSA
  2. 2.Virginia Water Resources and Research CenterVirginia Polytechnic Institute and State UniversityBlacksburgUSA
  3. 3.Timber and Watershed LaboratoryUSDA Forest ServiceParsonsUSA

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