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This article in SSSAJ

  1. Vol. 38 No. 3, p. 522-524
    Received: Oct 31, 1973
    Accepted: Jan 29, 1974

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Volatilization of Oxides of Nitrogen from Nitrate-Treated Black Spruce Raw Humus1

  1. M. K. Mahendrappa2



Raw humus sods covered with sphagnum (Sphagnum sp.) and feather (Pleurozium sp. and Hypnum sp.) mosses were treated with various forms of nitrate and then incubated in glass tanks with air passing over the sods. Oxides of nitrogen removed from the glass tanks by air were absorbed by two traps containing alkaline permanganate solution.

Volatilization of oxides of nitrogen was observed in all cases. The quantities of oxides of nitrogen evolved decreased with the treatments in the order: Al(NO3)3 > Ca(NO3)2 > NH4NO3 > KNO3. In all the treatments, the proportion of added nitratenitrogen trapped as oxides was very small (average of 0.005%). The L and F layers of raw humus became more acid with nitrate treatments.

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