Titre : | Survival of late outplanted Norway spruce cuttings depends on their mycorrhizal status (poster) |
Titre original: | La survie de l'Epicéa commun planté tardivement dépend de son statut mycorhizien |
Auteurs : | B. Genere ; CEMAGREF NOGENT SUR VERNISSON RGNO ; 1rst international conference on mycorrhizae (ICOM 1), Berkeley, USA, 4-9 August 1996 (1996; USA) |
Type de document : | article/chapitre/communication |
Année de publication : | 1996 |
Format : | 1 p. |
Note générale : |
Sigle : RGNO Sigle : CEMAGREF Diffusion tous publics |
Langues: | = Anglais |
Catégories : | |
Mots-clés: | PICEA ABIES ; BOUTURE ; TRANSPLANTATION ; DATE ; SURVIE ; MYCORHIZE ; MYCORHIZATION ; INOCULATION |
Résumé : |
Une plantation tardive (en mai) de boutures d'Epicéa commun en montagne a révélé que les plants mycorhizés par Laccaria bicolor S238N issus de 2 pépinières avaient un taux de reprise moindre que des plants témoins naturellement mycorhizés. Une expérience complémentaire montre que cet effet négatif est lié à la plantation tardive, effectuée à un moment où les plants débourrent. In mountains, Norway spruce is often planted late in spring (in April or May) due to climatic conditions. Under similar conditions, a field trial was established in 1992 on a classic forest site. Rooted cuttings grown in fumigated nursery beds for 2.5 years were used as planting stock. Different effects were studied : mainly, the 2 nursery sites (Les Barres and Peyrat-le-Château) and inoculation with Laccaria bicolor S 238 N (presence versus absence). Prior to planting, the planting stock was analyzed as regards morphology, oven-dry weight, mycorrhizal status and nutrition (foliar analysis). Two years after planting, the survival rate was markedly lower on inoculated cuttings (65 to 70% instead of 86 to 97%), whatever the nursery site. Their mycorrhizal infection rate with pure Laccaria bicolor S 238 N was very high at the time of planting (50 to 70%), and about 20% two years later. The poor performance of inoculated cuttings proved to be connected to late outplanting, when budbreak occurs. This finding is based on the results of a second experiment in 1995 with two crossed factors : inoculation (with Laccaria bicolor S 238 N or no inoculation) and planting date (March 10 or May 10). Thus, being planted in March, the inoculated cuttings displayed a very high survival rate, one year after planting (99% instead of 77% for May). |
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Val de Loire | Nogent | Articles/chapitres/communications | D 4296 | Empruntable | Disponible pour le prêt |