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Master thesis

Effets des greffes racinaires sur l'écologie de l'épinette noire (Picea Mariana)

Abstract : The main objective of this project was to bring knowledge on the root grafts of the black spruce (Picea mariana) in natural stand. The study was to know the involved factors in graft formation and their effects on the dynamics of forests stands. Tree are traditionally considered as distinct entities and in competion for resources. Nevertheless, many works showed that trees can share, carbohydrates, water or nutriments by the presence of root grafts. Thus, trees would be directly interconnected to be able to interact between them. To answers our objectives, we investigated three plots (125 trees) which were hydraulically excavated. Various parameters were measured (distance between trees ; density and height) to determine the influence on the presence of root grafted. We also measured yearly radial growth and determined the influence of root grafting on radial growth of grafted trees. Our results showed that black spruce can be grafted and influence positively the growth. Diameters and distances factors can explain the presence of root graft. These results suggest that root grafting are nonprejudicial and maybe beneficial to tree growth.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2014_GROUX_JOSSELIN.pdfss
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https://hal.univ-lorraine.fr/hal-01836210
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Josselin Groux. Effets des greffes racinaires sur l'écologie de l'épinette noire (Picea Mariana). Sciences de l'environnement. 2014. ⟨hal-01836210⟩

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