Natural regeneration within the Coillte estate. II The occurrence of natural regeneration of lodgepole pine on clearfelled areas.

  • Áine Ní Dhubháin Department of Crop Science, Horticulture and Forestry, University College Dublin, Belfield, Dublin 4, Ireland.
  • Dermot O'Leary Coillte, Ballintemple Nursery, Co. Carlow, Ireland.
Keywords: Seed germination, seedling survival, logistic regression, probability model.

Abstract

The factors that influence the probability of lodgepole pine (Pinus contorta Dougl. var. contorta) regenerating naturally were examined in a field survey of dearfelled lodgepole pine sites in the Coillte (Irish Forestry Board) estate. Sixty-six sites with naturally regenerated lodgepole pine and 41 sites without were selected. Logistic regression was used to model the relationship between its occurrence and site and stand factors. Of twenty-five factors examined, four were shown to significantly influence the probability of natural regeneration occurring: site exposure, site drainage status, the percentage of the clearfelled crop comprising lodgepole pine and whether the antecedent stand had been thinned. Lodgepole pine natural regeneration was reduced at increased exposure, whereas improved site drainage increased it. The greater the percentage of lodgepole pine in the antecedent crop, the greater the probability of lodgepole pine regeneration occurring. Thinning also increased the probability of natural regeneration occurring.
Published
2002-11-01
How to Cite
Ní Dhubháin, Áine and O’Leary, D. (2002) “Natural regeneration within the Coillte estate. II The occurrence of natural regeneration of lodgepole pine on clearfelled areas.”, Irish Forestry. Available at: https://journal.societyofirishforesters.ie/index.php/forestry/article/view/9922 (Accessed: 28March2024).
Section
Articles