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Silva Fennica 1926-1997
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Acta Forestalia Fennica
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Articles by Catherine Collet

Category: Research article

article id 10409, category Research article
Noé Dumas, Mathieu Dassot, Jonathan Pitaud, Jérôme Piat, Lucie Arnaudet, Claudine Richter, Catherine Collet. (2021). Four-year-performance of oak and pine seedlings following mechanical site preparation with lightweight excavators. Silva Fennica vol. 55 no. 2 article id 10409. https://doi.org/10.14214/sf.10409
Highlights: Mechanical site preparation (MSP) with lightweight excavators controls highly competitive plant species (Molinia caerulea, Pteridium aquilinum) much more efficiently than MSP with conventional methods; This MSP approach improves four-year survival and growth of pine seedlings, but it is less evident for oak seedlings.

Mechanical site preparation methods that used tools mounted on lightweight excavators and that provided localised intensive preparation were tested in eight experimental sites across France where the vegetation was dominated either by Molinia caerulea (L.) Moench or Pteridium aquilinum (L.) Kuhn. Two lightweight tools (Deep Scarifier: DS; Deep Scarifier followed by Multifunction Subsoiler: DS+MS) were tested in pine (Pinus sylvestris L., Pinus nigra var. corsicana (Loudon) Hyl. or Pinus pinaster Aiton) and oak (Quercus petraea (Matt.) Liebl. or Quercus robur L.) plantations. Regional methods commonly used locally (herbicide, disk harrow, mouldboard plow) and experimental methods (repeated herbicide application; untreated control) were used as references in the experiments. Neighbouring vegetation cover, seedling survival, height and basal diameter were assessed over three to five years after plantation. For pines growing in M. caerulea, seedling diameter after four years was 37% and 98% greater in DS and DS+MS, respectively, than in the untreated control. For pines growing in P. aquilinum, it was 62% and 107% greater in the same treatments. For oak, diameter was only 4% and 15% greater in M. caerulea, and 13% and 25% greater in P. aquilinum, in the same treatments. For pines, the survival rate after four years was 26% and 32% higher in M. caerulea and 64% and 70% higher in P. aquilinum, in the same treatments. For oak, it was 3% and 29% higher in M. caerulea and 37% and 31% higher in P. aquilinum. Herbicide, when applied for three or four years after planting, provided the best growth performances for pines growing in M. caerulea and P. aquilinum and for oaks growing in P. aquilinum. For these species and site combinations, DS+MS and DS treatments reduced the neighbouring vegetation cover for one to four years following site preparation.

  • Dumas, Université de Lorraine, AgroParisTech, INRAE, UMR Silva, 54000 Nancy, France ORCID ID:E-mail: noe.dumas@inrae.fr
  • Dassot, EcoSustain, Environmental Engineering Office, Research and Development, 31, rue de Volmerange, 57330 Kanfen, France; Institut National de l’Information Géographique et Forestière, 1 rue des Blanches Terres, 54250 Champigneulles, France ORCID ID:E-mail: mathieu.dassot@ign.fr
  • Pitaud, Office National des Forêts, Département Recherche Développement et Innovation, route d’Amance, 54280 Champenoux, France ORCID ID:E-mail: jonathan.pitaud@onf.fr
  • Piat, Office National des Forêts, Département Recherche Développement et Innovation, 3 rue du petit château, 60200 Compiègne, France ORCID ID:E-mail: jerome.piat@onf.fr
  • Arnaudet, Office National des Forêts, Département Recherche Développement et Innovation, 100 boulevard de la Salle, 45760 Boigny-sur-Bionne, France ORCID ID:E-mail: lucie.arnaudet@onf.fr
  • Richter, Office National des Forêts, Département Recherche Développement et Innovation, Boulevard de Constance, 77300 Fontainebleau, France ORCID ID:E-mail: claudine.richter@onf.fr
  • Collet, Université de Lorraine, AgroParisTech, INRAE, UMR Silva, 54000 Nancy, France ORCID ID: https://orcid.org/0000-0003-0861-7796 E-mail: catherine.collet@inrae.fr (email)

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