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This article in SSSAJ

  1. Vol. 29 No. 6, p. 756-759
     
    Received: Apr 2, 1965
    Published: Nov, 1965


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doi:10.2136/sssaj1965.03615995002900060042x

Nitrogen Recovery from Decomposing Tree Leaf Tissue and Forest Humus1

  1. G. K. Voigt2

Abstract

Abstract

Recovery of N from decomposing leaf litter of alder (Alnus rugosa [Du Rois] Spring.), dogwood (Corus florida L.), tulip poplar (Liriodendron tulipifera L.), hemlock (Tsuga canadensis [L.] Carr.), eastern redcedar (Juniperus virginiana L.), and red pine (Pinus resinosa Ait.) was studied under laboratory and greenhouse conditions. Weight loss and N deficits in decomposing tissue were more marked in hardwoods than in conifers. There was no pronounced species correlation between Ca concentration of the leaf litter and either weight loss or N deficit, but N deficit was increased in some cases by addition of CaCO3. Considerable variation in availability of N to Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) seedlings was observed in soil cultures where N originated from decomposing leaf tissue or from humus samples collected under the aforementioned species. Recovery of N ranged from about 60 to over 90% of the original N content.

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