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Titolo:
RECOVERING TIME TRENDS IN DOMINANT HEIGHT FROM STEM ANALYSIS
Autore:
MAGNUSSEN S; PENNER M;
Indirizzi:
FORESTRY CANADA,PACIFIC FORESTRY CTR,NAT RESOURCES CANADA,506 W BURNSIDE RD VICTORIA BC V8Z 1M5 CANADA NAT RESOURCES CANADA,CANADIAN FORESTRY SERV,PETAWAWA NATL FORESTRY INST CHALK RIVER ON K0J 1J0 CANADA
Titolo Testata:
Canadian journal of forest research
fascicolo: 1, volume: 26, anno: 1996,
pagine: 9 - 22
SICI:
0045-5067(1996)26:1<9:RTTIDH>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
SITE-INDEX CURVES; NORTH CENTRAL ONTARIO; EARLY SELECTIONS; JACK PINE; GROWTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
S. Magnussen e M. Penner, "RECOVERING TIME TRENDS IN DOMINANT HEIGHT FROM STEM ANALYSIS", Canadian journal of forest research, 26(1), 1996, pp. 9-22

Abstract

Site-index curves derived from stem analysis of trees with dominant height at the time of selection will underestimate dominant height of young trees and thus overestimate the performance and yield expectations of young stands. A simple model-based adjustment procedure is presented and tested on two artificial populations and two data sets from repeatedly measured plots. To recover a less biased height-age curve of dominant trees, estimates are needed of age-age correlations and the sampling intensity (standardized height difference) applied to the selection of site trees for stem analysis. Adaptation to different definitions of dominant height is possible. Results confirmed that the recovery procedure is very effective in reducing the relative bias. Bias reduction in excess of 40% can be expected during the first half of a rotation. Small but insignificant increases in bias were encountered during the second half of a rotation.

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Documento generato il 25/11/20 alle ore 18:42:25