Free access
Ann. For. Sci.
Volume 60, Number 8, December 2003
Page(s) 757 - 762
Ann. For. Sci. 60 (2003) 757-762
DOI: 10.1051/forest:2003070

Survival and growth of Abies nordmanniana in forest and field in relation to stock type and root pruning prior to transplanting

Lillie Andersena and Niclas Scott Bentsenb

a  Danish Institute of Agricultural Sciences, Department of Horticulture, Kirstinebjergvej 10, PO 102, 5792 Aarslev, Denmark
b  Danish Forest and Landscape Research Institute, Department of Forestry, Hoersholm Kongevej 10, 2970 Hoersholm, Denmark

(Received 3 June 2002; accepted 30 October 2002)

Abstract - Bare-rooted seedlings of Abies nordmanniana (three stock types) were root-pruned prior to planting to evaluate the importance of stock types and root size on subsequent survival and growth after transplanting under forest and field conditions. Survival, height, root-collar diameter and dry weight (DW) of shoots and roots were compared to those of unpruned controls after two growing seasons. Transplanting in the forest significantly reduced growth in terms of plant DW, but increased height. Severe pruning of the root system reduced survival, increment in height and DW significantly. A positive relationship between height increment and initial ratio between root and shoot was found. Unpruned 2 + 2 seedlings maintained their initial advantage in terms of height, whereas the difference between 2 + 1 seedlings and 3 + 0 seedlings was small two years after transplanting.

Résumé - Survie et croissance d'Abies nordmanniana en forêt et au champ par rapport à la dimension des semis et à un élagage des racines antérieur à une transplantation. Les racines de jeunes semis d'Abies nordmanniana ont été taillés avant plantation afin d'évaluer l'importance de la dimension des plants et des racines par rapport à la survie et à la croissance, après transplantation dans les conditions de forêt de pleine terre. Après deux saisons de croissance, la survie, la hauteur, le diamètre au collet et le poids sec des pousses et des racines ont été comparés avec ceux des plants du traitement témoin. La transplantation a réduit de manière significative la croissance quant au poidss sec des plants, mais a augmenté la croissance en hauteur. Une taille sévère du système racinaire a réduit de manière significative la survie, l'accroissement en hauteur et le poids sec. Une relation positive entre l'accroissement en hauteur et le rapport initial entre racine et pousse a été trouvée notamment en pleine terre. Les jeunes plants non taillés transplantés en 2 + 2 ont gardé leur avantage initial quant à la hauteur, tandis que la différence entre les jeunes plants 2 + 1 et les plants 3 + 0 a été faible deux ans après la transplantation.

Key words: dry weight / height / root:shoot ratio

Mots clés : poids sec / hauteur / rapport racine/pousse

Corresponding author: Lillie Andersen

© INRA, EDP Sciences 2003

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