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    Author(s): Finto Antony; Laurence R. Schimleck; Richard F. Daniels; Alexander Clark
    Date: 2011
    Source: Southern Journal of Applied Forestry 35(3):142-147
    Publication Series: Scientific Journal (JRNL)
    Station: Southern Research Station
    PDF: View PDF  (350.34 KB)

    Description

    Growth and wood properties were measured on breast height cores collected from two stands, New Bern and Bertie, located in the lower Coastal Plain of North Carolina. The New Bern site was thinned before fertilizer application, and the Bertie site was not. The study was laid out in a randomized complete block design with each treatment replicated in four blocks at New Bern and two blocks at Bertie. The treatments were different levels of nitrogen fertilization: control (no nitrogen) and 112, 224, and 336 kg/ha. In addition, 28 kg/ha of phosphorus was included with each treatment. The objective of this study was to examine the response in growth and wood properties to midrotation fertilization in a thinned versus an unthinned stand. A significant decrease in latewood specific gravity was observed following nitrogen fertilization in the thinned stand but not in the unthinned stand. Whole ring width, latewood width, and earlywood width significantly increased following nitrogen fertilization at New Bern but not at Bertie. Whole ring specific gravity, earlywood specific gravity, latewood percentage, and earlywood:latewood ratio did not show any change due to fertilization in either stand. Responses in both growth and wood characteristics lasted for 2–3 years following fertilization and depended on the amount of fertilizer applied and whether or not the site was thinned. The response to nitrogen application was significant for the thinned stand only.

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    Citation

    Antony, Finto; Schimleck, Laurence R.; Daniels, Richard F.; Clark, Alexander, III. 2011. Effect of Fertilization on Growth and Wood Properties of Thinned and Un-thinned Mid-rotation Loblolly Pine (Pinus taeda L.) Stands. Southern Journal of Applied Forestry 35(3):142-147.

    Keywords

    wood density, specific gravity, ring width, repeated measure, mixed-effects model

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