Approaches to model mid-rotation treatment effects in loblolly pine plantations in the Southeastern United States

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  • Authors: Zapata, Mauricio; Bullock, Bronson P.; Montes, Cristian R.
  • Publication Year: 2020
  • Publication Series: Proceedings - Paper (PR-P)
  • Source: e–Gen. Tech. Rep. SRS–253. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station

Abstract

Loblolly pine (Pinus taeda L.) plantations are extensive in the Southeastern United States and represent a significant component of the forest products market in this region. For optimal stand-level management decisions, the growth response to any combination of mid-rotation silvicultural treatments like fertilization, thinning, or competing vegetation management needs to be accurately predicted over the long term. We present a review of the most common mid-rotation silvicultural treatments applied in loblolly pine plantations and provide a conceptual framework about their effects. Three theoretical expected types of responses are illustrated as a guide for better and more comprehensive modeling approach selection. Preliminary exploratory data analysis of remeasured plots from a mid-rotation treatment study established by the Plantation Management Research Cooperative at the University of Georgia indicates that basal area growth after thinning follow a Type I response and treatments such as thinning + fertilization or thinning + fertilization + vegetation control can follow either Type I or Type II responses. Finally, some thoughts are provided on how to improve the prediction accuracy of growth-and-yield models considering mid-rotation treatments.

  • Citation: Zapata, Mauricio; Bullock, Bronson P.; Montes, Cristian R. 2020. Approaches to model mid-rotation treatment effects in loblolly pine plantations in the Southeastern United States. In: Bragg, Don C.; Koerth, Nancy E.; Holley, A. Gordon, eds. 2020. Proceedings of the 20th biennial southern silvicultural research conference. e–Gen. Tech. Rep. SRS–253. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station: 251-257.
  • Keywords: loblolly pine, Pinus taeda, management
  • Posted Date: September 15, 2020
  • Modified Date: October 30, 2020
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