Theses and Dissertations

Advisor

Polinko, Adam

Committee Member

Siegert, Courtney

Committee Member

Renninger, Heidi

Date of Degree

8-7-2025

Original embargo terms

Immediate Worldwide Access

Document Type

Graduate Thesis - Open Access

Major

Forestry

Degree Name

Master of Science (M.S.)

College

College of Forest Resources

Department

Department of Forestry

Abstract

Restoration of longleaf pine (Pinus palustris Mill.) can be challenging on sites with high densities of naturally regenerated loblolly pine (Pinus taeda L.). This study aims to understand how interspecific competition impacts early establishment of planted longleaf pine. The study area was a complete block design to evaluate two different fertilization methods and application of diazotrophic endophytes. While the site was chemically prepared, high densities of loblolly pine established from adjacent stands. Measurements included survival, root collar diameter, height, and neighboring competition. Soil properties, including texture and nitrogen mineralization rates, were also evaluated. Results indicate that fertilization had a significant effect on tree- and non-tree competition. Longleaf pine biomass was negatively impacted by natural loblolly pine and herbaceous competition. Increased competition shifted allocation towards belowground biomass. Understanding establishment dynamics may help to re-establish longleaf pine within its native range and increase biodiversity across the southeastern U.S.

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