Journal of Food, Agriculture and Environment
Vol 11,
Issue 3&4,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Seedling survival and growth under uneven-aged selection silviculture in longleaf pine (Pinus palustris Mill.) ecosystem
Author(s):
Qiuju Guo,
Dexiang Wang*Recieved Date: 2013-05-16, Accepted Date: 2013-10-18
Abstract:In a study to explore effects of uneven-aged silviculture on natural longleaf pine seedling regeneration and growth, the work was conducted on the second-growth longleaf pine stands that had been thinned using uneven-aged selection to basal areas ranging from 7 to 25 m2 ha-1. Regeneration seedlings with heights from 5 to 130 cm were counted and measured in 2009 and 2011 from 18 thinned and 4 unthinned stands. In addition, the survival rate and height increment of seedlings after two growing seasons were recorded. The results showed that residual basal area was negatively correlated with survival rate for all seedlings. Selection treatments improved survival and growth of longleaf pine seedlings. In contrast with the seedlings in unthinned substands, higher survival rate and growth of seedlings were found in the uneven-aged selection subtstands in the two inventories. Regeneration of small seedlings (5 - 15 cm) was unsuccessful when basal area reached 40 m2 ha-1. For the large longleaf pine seedlings (15 - 130 cm), no significant difference was found between selection and unthinned substands. The results indicated that the basal area lower than 25 m2 ha-1 with a open overstory spatial structure provides a suitable environment for regeneration and growth of longleaf pine seedling in the studied area.
Keywords:Survival rate,
height increment, basal area, seedlingsJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 1814-1819
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