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Nutrient Composition of Sycamore Blades, Petioles, and Whole Leaves

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Foliar nutrient concentrations were determined for 3-year-old sycamore trees growing with leguminous plants or trees treated with chemical fertilizer. Whole leaf and leaf divided into blade and petiole were analyzed for N, P, K, Ca, and Mg. Nitrogen concentrations were consistently highest in the blade, lowest in the petiole, and intermediate in the whole leaf. Calcium concentrations followed a similar pattern; however, the magnitude of differences among leaf portions was markedly less than for N. Phosphorus and potassium levels were highest in the petiole, lowest in the blade, and intermediate in the whole leaf. Magnesium concentrations did not vary by leaf portion. Of those nutrients examined, N and P concentrations in the blades were the most highly correlated with sycamore height and volume growth. Blade-K and whole leaf-Ca were significantly correlated with growth, while Mg concentrations did not exhibit a consistent response pattern. Because of the higher correlations between blade-N, -P, and -K and subsequent growth, sycamore blades should be used for chemical analysis. Forest Sci. 25:154-160.

Keywords: Platanus occidentalis L; foliage analysis; foliage sampling

Document Type: Journal Article

Affiliations: Technical Development Supervisor, Champion-International Corporation, Courtland, Alabama 35618

Publication date: March 1, 1979

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