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Titolo:
EFFECTS OF SOIL ORGANIC LAYER REMOVAL ON REGENERATION AFTER CLEAR-CUTTING A NORTHERN HARDWOOD STAND IN NEW-BRUNSWICK
Autore:
ROBERTS MR; DONG HY;
Indirizzi:
UNIV NEW BRUNSWICK,FAC FORESTRY,DEPT FOREST RESOURCES FREDERICTON E3B6C2 NB CANADA
Titolo Testata:
Canadian journal of forest research
fascicolo: 10, volume: 23, anno: 1993,
pagine: 2093 - 2100
SICI:
0045-5067(1993)23:10<2093:EOSOLR>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUCCESSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
M.R. Roberts e H.Y. Dong, "EFFECTS OF SOIL ORGANIC LAYER REMOVAL ON REGENERATION AFTER CLEAR-CUTTING A NORTHERN HARDWOOD STAND IN NEW-BRUNSWICK", Canadian journal of forest research, 23(10), 1993, pp. 2093-2100

Abstract

Our objective was to determine the effects of clear-cutting and removal of the soil organic layer an residual vegetation on regeneration ofwoody species from seed. Germination, survival, and height growth of woody seedlings were followed over a 4-year period after clear-cuttingin plots with and without die organic layer and vegetation removed. After 4 years, Betula alleghaniensis Britton and Rubus idaeus L. predominated on the disturbed plots. On the undisturbed plots, Rubus, Acer saccharum Marsh. (mostly advance regeneration), and Acer pensylvanicum L. (new germinants and advance regeneration) were most abundant. Germination (all species combined) was 1.2-1.5 times higher on the disturbed plots in the first 2 years. Seedling survival was 19-33% higher on the disturbed plots in years 1 and 2 because of the lower occurrence oflethal surface temperatures (>42-degrees-C). Little recruitment of most species occurred after year 2 except for A. saccharum, which increased in density over time on both treatments. Acer pensylvanicum occurred only on the undisturbed plots and decreased steadily in density over time. Differences among species in regeneration patterns were related to seed availability, seedbed characteristics, and regeneration strategies. Betula was the tallest species on 40% of the disturbed plots in spite of higher Rubus densities. Advance regeneration dominated 57% of the undisturbed plots. The relative heights, densities, and growth rates of species indicate that Rubus provides less competition than advance regeneration for Betula crop trees.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 15:55:35