Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina

A thinning method is proposed to reduce windthrow risk in a high quality site (SI60= 23.2 m) of lenga (Nothofagus pumilio) forests. Sixty seven-year-old (base age at 1.3 m) even-aged stands were thinned in 1996. The method involved thinning from above to maintain the stand stability and proposed a g...

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Autores principales:	PERI,PABLO, MARTINEZ PASTUR,GUILLERMO, VUKASOVIC,RICARDO, DIAZ,BORIS, LENCINAS,MARIA VANESSA, CELLINI,JUAN MANUEL
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2002
Materias:	Growth stability yield wind damage silviculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002002000200003
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spelling	oai:scielo:S0717-920020020002000032005-09-23Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, ArgentinaPERI,PABLOMARTINEZ PASTUR,GUILLERMOVUKASOVIC,RICARDODIAZ,BORISLENCINAS,MARIA VANESSACELLINI,JUAN MANUEL Growth stability yield wind damage silviculture A thinning method is proposed to reduce windthrow risk in a high quality site (SI60= 23.2 m) of lenga (Nothofagus pumilio) forests. Sixty seven-year-old (base age at 1.3 m) even-aged stands were thinned in 1996. The method involved thinning from above to maintain the stand stability and proposed a gradual reduction of crown density increasing the growth of selected trees (target trees). The system was carried out by five successive operations that incorporated the technique of girdling follower trees. Two thinning levels were defined: at 872 stems/ha (light thinning treatment) and 489 stems/ha (heavy thinning treatment). Each treatment had an area of 1 hectare with six long-term plots. Four permanent plots were established as controls and were not thinned. The diameter, basal area and volume growth were recorded for all treatments, and mortality rate and crown class dynamics were measured in the control. Total stem volume over bark and merchantable volume by log type were collected from trees felled in the first thinning intervention. Six year results from this study indicated that the proposed thinning method could achieve maximum growth and simultaneously avoid large gaps between tree crowns that may induce windthrow.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.23 n.2 20022002-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002002000200003en10.4067/S0717-92002002000200003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Growth stability yield wind damage silviculture
spellingShingle	Growth stability yield wind damage silviculture PERI,PABLO MARTINEZ PASTUR,GUILLERMO VUKASOVIC,RICARDO DIAZ,BORIS LENCINAS,MARIA VANESSA CELLINI,JUAN MANUEL Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina
description	A thinning method is proposed to reduce windthrow risk in a high quality site (SI60= 23.2 m) of lenga (Nothofagus pumilio) forests. Sixty seven-year-old (base age at 1.3 m) even-aged stands were thinned in 1996. The method involved thinning from above to maintain the stand stability and proposed a gradual reduction of crown density increasing the growth of selected trees (target trees). The system was carried out by five successive operations that incorporated the technique of girdling follower trees. Two thinning levels were defined: at 872 stems/ha (light thinning treatment) and 489 stems/ha (heavy thinning treatment). Each treatment had an area of 1 hectare with six long-term plots. Four permanent plots were established as controls and were not thinned. The diameter, basal area and volume growth were recorded for all treatments, and mortality rate and crown class dynamics were measured in the control. Total stem volume over bark and merchantable volume by log type were collected from trees felled in the first thinning intervention. Six year results from this study indicated that the proposed thinning method could achieve maximum growth and simultaneously avoid large gaps between tree crowns that may induce windthrow.
author	PERI,PABLO MARTINEZ PASTUR,GUILLERMO VUKASOVIC,RICARDO DIAZ,BORIS LENCINAS,MARIA VANESSA CELLINI,JUAN MANUEL
author_facet	PERI,PABLO MARTINEZ PASTUR,GUILLERMO VUKASOVIC,RICARDO DIAZ,BORIS LENCINAS,MARIA VANESSA CELLINI,JUAN MANUEL
author_sort	PERI,PABLO
title	Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina
title_short	Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina
title_full	Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina
title_fullStr	Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina
title_full_unstemmed	Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina
title_sort	thinning schedules to reduce risk of windthrow in nothofagus pumilio forests of patagonia, argentina
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002002000200003
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_version_	1718444125174366208

Thinning schedules to reduce risk of windthrow in Nothofagus pumilio forests of Patagonia, Argentina

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