Compensatory Growth in Pinus ponderosa (Dougl Ex Laws) Plantations Under Early Silvicultural Treatments

Authors

  • Federico Jorge Letourneau Campo Anexo San Martín - IFAB (INTA - CONICET)- Instituto de Investigaciones Forestales y Agropecuarias de Bariloche. Ruta Nacional N° 40 Km 1911. C. P. 8430. Paraje Las Golondrinas. Lago Puelo. Chubut. Argentina https://orcid.org/0000-0001-7618-705X
  • Andrea Alejandra Medina Universidad Nacional del Comahue. Centro Regional Universitario San Martín de los Andes (CRUSMA). Pasaje de la Paz 235. San Martín de los Andes. C. P. 8370. Neuquén. Argentina https://orcid.org/0000-0003-1356-1141
  • Marcos Ancalao Campo Anexo San Martín - IFAB (INTA - CONICET)- Instituto de Investigaciones Forestales y Agropecuarias de Bariloche. Ruta Nacional N° 40 Km 1911. C. P. 8430. Paraje Las Golondrinas. Lago Puelo. Chubut. Argentina https://orcid.org/0009-0000-8180-9984
  • Matías Horacio Saihueque Campo Anexo San Martín - IFAB (INTA - CONICET)- Instituto de Investigaciones Forestales y Agropecuarias de Bariloche. Ruta Nacional N° 40 Km 1911. C. P. 8430. Paraje Las Golondrinas. Lago Puelo. Chubut. Argentina https://orcid.org/0009-0001-5463-3976

DOI:

https://doi.org/10.48162/rev.39.169

Keywords:

compensatory growth, hydraulic architecture, adaptive response

Abstract

Early pruning and thinning in Pinus ponderosa, plantations in Andean Patagonia triggered compensatory growth, characterized by greater trunk growth and structural adjustments. We used a factorial design and mixed-effects models to evaluate stem growth, crown light dynamics, tracheid length (TL), foliar biomass (FB), wood density (WD), and Huber values (Hv) five years after treatment. Trees under combined pruning and thinning (PT) showed the greatest basal area increment, indicating resource reallocation to supportive structures despite early foliage loss. Pruned trees maintained higher Hv and achieved partial recovery of FB. Tracheid elongation was greatest in treated trees, suggesting accelerated xylem maturation, while WD remained unchanged. These results demonstrate the structural plasticity of P. ponderosa, which maintains hydraulic function and growth after canopy disturbance. Our findings provide useful guidance for silvicultural planning in temperate plantations.

Highlights:

  • Early pruning and thinning triggered compensatory stem growth through hydraulic and structural adjustments, guiding adaptive management in Andean Pinus ponderosa plantations.
  • The Huber value (Hv) captured the balance between conductive tissue and leaf biomass, revealing hydraulic rebalancing after canopy modification in young plantations.
  • Tracheid elongation indicated accelerated xylem maturation in treated trees without affecting wood density.
  • Findings highlight the potential of early canopy interventions to enhance productivity and hydraulic resilience in managed temperate conifer plantations.

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Published

05-12-2025

How to Cite

Letourneau, F. J., Medina, A. A., Ancalao, M., & Saihueque, M. H. (2025). Compensatory Growth in Pinus ponderosa (Dougl Ex Laws) Plantations Under Early Silvicultural Treatments. evista e a acultad e iencias grarias NCuyo, 57(2), 34–44. https://doi.org/10.48162/rev.39.169

Issue

Vol. 57 No. 2 (2025): July-December

Section

Ecophysiology and crop management

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