Nutrient Concentrations in Naturally Regenerated Seedlings of Picea sitchensis in Southeast Alaska

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Abstract
Concentrations of N, P, K, Mg, Ca, Mn were determined in tops and roots, and S in tops, of naturally regenerated Sitka spruce seedlings growing on youthful and mature soils near Juneau, SE Alaska. The samples were taken at the end of the growing season from sites with and without alder ( Alnus sinuata ) as the principal hardwood component. P, Mg, and Mn concentrations of seedlings from mature soils were larger than in those from youthful soils. Differences in N, K, and Ca concentrations were small. Seedlings on sites with alder tended to have more N, P, and K than on those without. Nutrient concentrations of naturally regenerated Alaskan seedlings from mature soils, with alder present, resembled closely those of healthy 1 + 1 transplants in English forest nurseries.

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