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Titolo:
Juvenile growth and crown morphological plasticity of eastern white pines (Pinus strobus L.) planted along a natural light gradient: Results after six years
Autore:
Messier, C; Parent, S; Chengaou, M; Beaulieu, J;
Indirizzi:
UQAM, Grp Rech Ecol Forestiere Interuniv, Montreal, PQ H3C 3P8, Canada UQAM Montreal PQ Canada H3C 3P8 e Interuniv, Montreal, PQ H3C 3P8, Canada
Titolo Testata:
FORESTRY CHRONICLE
fascicolo: 2, volume: 75, anno: 1999,
pagine: 275 - 279
SICI:
0015-7546(199903/04)75:2<275:JGACMP>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
EFFICIENT METHOD; ARCHITECTURE; SAPLINGS; FOREST; FIR;
Keywords:
understory growth; white pine; understory planting; crown morphology; silvicultural options; light gradient;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Messier, C UQAM, Grp Rech Ecol Forestiere Interuniv, CP 8888,Succ Ctr Ville, Montreal, UQAM CP 8888,Succ Ctr Ville Montreal PQ Canada H3C 3P8 ontreal,
Citazione:
C. Messier et al., "Juvenile growth and crown morphological plasticity of eastern white pines (Pinus strobus L.) planted along a natural light gradient: Results after six years", FOREST CHRO, 75(2), 1999, pp. 275-279

Abstract

Underplanting white pine (Pinus strobus L.) is a promising method to reduce competition and protect against white pine weevil (Pissodes strobi (Peck)) damage. However, shading caused by overstory trees can reduce growth, vigor and survival of white pine. The objective of this study was to determinethe effects of a Light gradient on the growth and overall crown morphologyof white pine saplings planted in 3-meter strips within a hardwood forest some six years earlier. In 1994, we measured total height and diameter, leader length (in 1994) and numerous crown morphological variables. We then estimated the Light environment above the crown of 63 young white pine saplings representing six families of close provenance. White pine grew well (i.e., >20 cm in height/year) for the first six years when planted at light levels between 10 and 66% of full sunlight. Total height and diameter after six years tended to decline more sharply below 30% full sunlight, confirming earlier experiments made in controlled conditions. No significant changes in crown morphology were evident along the light gradient. This lack of crown morphological plasticity presumably contributes to limiting the ability of white pine to grow and compete in a very low light environment. Various silvicultural options are discussed in light of the results obtained in thisstudy.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 16:45:22