Journal of Food, Agriculture and Environment

Longleaf pine (Pinus palustris Mill.) regeneration and growth under single-tree selection in southeastern United States

Author(s):

Qiuju Guo, Dexiang Wang *

Recieved Date: 2013-05-03, Accepted Date: 2013-10-18

Abstract:

This work presents empirical data on regeneration and growth of longleaf pine and constructs simple models for predicting these characteristics at various stand structure and post-thinning basal area levels. The field experiments were established on historical longleaf pine growth site in Southern Alabama, the United States. Seedling (with heights of 5-130 cm) regeneration data were measured from 36 longleaf pine dominated stands in 2007 and 2010; in addition, the annual height growth increment of seedlings was recorded. The results showed that the small longleaf pine seedling regeneration density was decreased from 2007 to 2010, and the large seedling regeneration density was increased from 2007 to 2010. The small and large longleaf pine seedling regeneration height increment was increased from 2007 to 2010. The seedling regeneration density and height growth negatively corresponded with the basal area. Regression analyses noted when the basal area level was over 40 m² ha^-1, the most abundant seedling regeneration and large height growth were existed in heavily thinned stands, less seedlings and slow height growth of longleaf pine regeneration were found in unthinned substands. The results indicated that a heavy post-thinning with a open overstory spatial structure provides a suitable environment for regeneration and growth of longleaf pine in the studied area.

Keywords:

Seedling growth, overstory spatial pattern, stand structure

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 1697-1702

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