Planting Density Study

Images of model based predictions for longleaf pine established at four different initial densities ten years after planting. Initial densities ranged from a high of 4,840 trees/acre to a low of 302 trees/acre.

So called old-field pines, and in particular loblolly pine, are difficult to maintain on upland sites managed with frequent fire. Planting longleaf pine in canopy gaps represents a viable way to transition to more sustainable management in this setting. Longleaf pine is intolerant of competition and requires fairly large canopy openings in order to recruit into the main canopy. Observation of natural regeneration dynamics in multiaged longleaf pine stands suggests openings tend to become densely regenerated and thin out over time, as opposed to being occupied by a few seedlings that exhibit high survival. This dynamic raises questions about the appropriate density at which to establish these plantings. A study was established to test the effect of a range of planting densities on a variety of relevant response variables. This study is being underwritten by Benson’s Heating and Air-conditioning. We thank Benson's HVAC for the seedlings used in this study.