Canadian Forest Service Publications
Nutrient leaching from the litter layer after clearfelling of Sitka spruce stands on peaty gley soils. 1992. Titus, B.D.; Malcolm, D.C. Forestry 65(4): 389-416.
Issued by: Pacific Forestry Centre
Catalog ID: 25413
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The nutrient dynamics in the litter layer of former Sitka spruce stands were examined from 0 to 7 years after clearfelling using zero-tension lysimeters on a time series of sites 0, 2 and 5 years after felling. The loss of most nutrients monitored in leachate was independent of the time from clearfelling. However, 54 per cent (43 kg ha -1) of the 7- year net loss of potassium was leached out of the litter layer in the first year. Also, nitrate losses, although small, increased after 5 years. Leaching losses of NH4-N, PO4- P, K, Ca and H+ exceeded precipitation inputs. However, leaching losses were less than precipitation inputs for NO3-N, Na and Mg. Nutrient losses from under brash swathes wee generally greater than from clear strips.