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This article in SSSAJ

  1. Vol. 41 No. 1, p. 136-139
     

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doi:10.2136/sssaj1977.03615995004100010036x

Nutrient Concentration in Black Spruce Foliage Immediately Following Fertilization1

  1. P. O. Salonius2

Abstract

Abstract

Ammonium sulfate, triple superphosphate, or K sulfate were applied to plots in a 60-year-old black spruce (Picea mariana (Mill.) B.S.P.) stand, and seasonal changes in foliar nutrient levels on the treated plots were compared with those on the control before and after fertilization. Nitrogen was absorbed initially very quickly but there appeared to be some delay in the initial uptake of P. Both N and P were absorbed steadily throughout the remainder of the growth season. Possible methods of capitalizing on this fact and thus increasing fertilizer efficiency and decreasing losses of applied nutrients are discussed.

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