Soil nitrogen form and plant nitrogen uptake along a boreal forest productivity gradient

  title={Soil nitrogen form and plant nitrogen uptake along a boreal forest productivity gradient},
  author={Annika C Nordin and Peter H{\"o}gberg and Torgny N{\"a}sholm},
We present results from a study of soil solution concentrations of ammonium (NH4 +), nitrate (NO3 –), and amino acid N over one growing season along a local 90-m-long plant productivity gradient in a boreal forest. Three forest types are found along the gradient: an ericaceous dwarf-shrub type between 0 and 40 m, a low-herb type between 40 and 80 m, and a tall-herb type at 90 m. Soil sampling of the mor layer was performed in June, July, August and October in the three forest types. In addition… CONTINUE READING
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