Titre :
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(Improvement in seed extraction in larch)
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Auteurs :
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G. Philippe ;
CEMAGREF NOGENT SUR VERNISSON AGNO
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Type de document :
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article/chapitre/communication
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Année de publication :
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1994
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Format :
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p.133-136
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Note générale :
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Sigle : CEMAGREF
Sigle : AGNO
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Langues:
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= Anglais
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Catégories :
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Matériel végétal, techniques de production, pépinière
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Mots-clés:
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LARIX DECIDUA
;
LARIX EUROLEPSIS
;
GRAINE
;
EXTRACTION
;
QUALITE
;
RECOLTE DES GRAINES
;
DATE
;
VIABILITE
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Résumé :
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Industrial extraction technique resulted in recovery of only a small percentage of the seed potential (about 20% in hybrid larch and 40% in European larch). As the first and last seeds which were extracted contained the same proportion of filled seeds, an important gain could be achieved through enhancement of extraction tehniques. In hybrid larch, cone crushing resulted in good extraction (80 % of seed potential) but, unfortunately, this technique led to a decrease in seed viability. The Danish method, which consists in setting the cones outside in gunny bags for some months after harvesting to promote their opening, seems attractive. Furthermore, most of the studied techniques proved more efficient when cone harvesting was delayed until Spring. Artificial cone opening through alternating cycles of frost and thaw should be studied in the future.
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Source :
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Northern conifers in fast growing conditions : a step towards an adequate wood supply for industry : first year progress report (Air contract N°CT920143), MONCHAUX P.(coord)
|