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Titolo:
SEEDLING MICROENVIRONMENT IN FULL-TREE AND TREE-LENGTH LOGGING SLASH
Autore:
MCINNIS BG; ROBERTS MR;
Indirizzi:
NEW BRUNSWICK DEPT NAT RESOURCES & ENERGY,TIMBER MANAGEMENT BRANCH,POB 6000 FREDERICTON NB E3B 5H1 CANADA UNIV NEW BRUNSWICK,FAC FORESTRY & ENVIRONM MANAGEMENT FREDERICTON NB E3B 5A3 CANADA
Titolo Testata:
Canadian journal of forest research
fascicolo: 1, volume: 25, anno: 1995,
pagine: 128 - 136
SICI:
0045-5067(1995)25:1<128:SMIFAT>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
B.G. Mcinnis e M.R. Roberts, "SEEDLING MICROENVIRONMENT IN FULL-TREE AND TREE-LENGTH LOGGING SLASH", Canadian journal of forest research, 25(1), 1995, pp. 128-136

Abstract

In response to concerns about the effects of slash removal on naturalregeneration, a microenvironment study was conducted in logging slashusing weighed full-tree (FT) and tree-length (TL) slash loads, and noslash (control), in the first summer after harvesting a mixed stand in New Brunswick. Significantly higher temperatures at the litter surface occurred in control and FT plots than in TL plots. Potentially lethal temperatures for new conifer germinants were recorded 18 times in FT and control plots combined, and once in TL plots. Differences among treatments in temperature peaks diminished in prolonged droughty weather. There were no differences in soil moisture tension at 10 cm depth,apparently because of restricted drainage. An average of 95% of full solar radiation (W/m(2), response range of measuring device 0.35-2.5 mu m) was measured in FT slash and 66% in TL slash. No significant differences in mortality or height growth of established coniferous advance growth (Picea spp. and Abies balsamea (L. ) Mill., mean height = 28.5cm) occurred, but significantly less mortality and significantly greater height growth of small Acer rubrum L. seedlings (mean height = 7 cm) occurred in the FT and control treatments than in the TL treatment. Results suggest that harvesting methods that involve slash removal could result in increased mortality of small conifer seedlings from direct heat damage and in increased competition from pioneering hardwoods.

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Documento generato il 05/12/20 alle ore 01:41:17