Fontana2020
Référence
Fontana, M., Collin, A., Courchesne, F., Labrecque, M., Belanger, N. (2020) Root System Architecture of Salix miyabeana “SX67” and Relationships with Aboveground Biomass Yields. Bioenergy Research, 13(1):183-196. (Scopus 
)
Résumé
This study focused on relationships between soil properties, root architecture, and aboveground biomass productivity of Salix miyabeana “SX67”. Roots were excavated at eight short-rotation cultures with contrasted soil/climatic conditions and root system ages from 4 to 14 years. The depth of the root branching points to the initial cuttings, root diameters, and root branching occurrence as well as soil physico-chemical properties were measured. Aboveground biomass had been estimated in a previous study, which allowed to calculate a proxy of root-to-shoot ratio. Root system ages and belowground biomass were related (adj. R2 = 0.88, p < 0.001). However, biomass partitioning in the different tree components was mainly governed by soil properties. Sand content was related to root-to-shoot ratio (adj. R2=0.73, p < 0.01) and the proportion of coarse roots (diameter > 1 cm) deeper than 10 cm (adj. R2 = 0.75, p < 0.01), whereas clay content was related to root branching occurrence-to-aboveground productivity ratio (adj. R2 = 0.80, p < 0.01). Coarse root depth distribution was related to aboveground biomass following a quadratic model that suggested (i) a maximal aboveground biomass productivity when a third of the roots were deeper than 10 cm and (ii) two opposite strategies of biomass allocation, i.e., biomass was allocated “downward” with a higher proportion of deeper roots and root-to-shoot ratio at sites with coarser soils and “upward” with a lower proportion of deeper roots and root-to-shoot ratio at sites with clayey/compacted soils. The study highlights how root plasticity of “SX67” copes with different soil stresses to maintain high aboveground biomass productivity. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
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@ARTICLE { Fontana2020,
AUTHOR = { Fontana, M. and Collin, A. and Courchesne, F. and Labrecque, M. and Belanger, N. },
JOURNAL = { Bioenergy Research },
TITLE = { Root System Architecture of Salix miyabeana “SX67” and Relationships with Aboveground Biomass Yields },
YEAR = { 2020 },
NOTE = { cited By 1 },
NUMBER = { 1 },
PAGES = { 183-196 },
VOLUME = { 13 },
ABSTRACT = { This study focused on relationships between soil properties, root architecture, and aboveground biomass productivity of Salix miyabeana “SX67”. Roots were excavated at eight short-rotation cultures with contrasted soil/climatic conditions and root system ages from 4 to 14 years. The depth of the root branching points to the initial cuttings, root diameters, and root branching occurrence as well as soil physico-chemical properties were measured. Aboveground biomass had been estimated in a previous study, which allowed to calculate a proxy of root-to-shoot ratio. Root system ages and belowground biomass were related (adj. R2 = 0.88, p < 0.001). However, biomass partitioning in the different tree components was mainly governed by soil properties. Sand content was related to root-to-shoot ratio (adj. R2=0.73, p < 0.01) and the proportion of coarse roots (diameter > 1 cm) deeper than 10 cm (adj. R2 = 0.75, p < 0.01), whereas clay content was related to root branching occurrence-to-aboveground productivity ratio (adj. R2 = 0.80, p < 0.01). Coarse root depth distribution was related to aboveground biomass following a quadratic model that suggested (i) a maximal aboveground biomass productivity when a third of the roots were deeper than 10 cm and (ii) two opposite strategies of biomass allocation, i.e., biomass was allocated “downward” with a higher proportion of deeper roots and root-to-shoot ratio at sites with coarser soils and “upward” with a lower proportion of deeper roots and root-to-shoot ratio at sites with clayey/compacted soils. The study highlights how root plasticity of “SX67” copes with different soil stresses to maintain high aboveground biomass productivity. © 2019, Springer Science+Business Media, LLC, part of Springer Nature. },
AFFILIATION = { Centre d’étude de la forêt, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, QC H3C 3P8, Canada; Institut de recherche en biologie végétale, Jardin botanique de Montréal, 4101 Sherbrooke East, Montréal, QC H1X 2B2, Canada; Département de géographie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC H3C 3J7, Canada; Département science et technologie, TÉLUQ, Université du Québec, 5800 rue Saint-Denis, bureau 1105, Montréal, QC H2S 3L5, Canada },
AUTHOR_KEYWORDS = { Belowground biomass allocation; Root branching; Root plasticity; Root-to-shoot ratio; Short rotation culture; Soil properties },
DOCUMENT_TYPE = { Article },
DOI = { 10.1007/s12155-019-10062-1 },
SOURCE = { Scopus },
URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074861529&doi=10.1007%2fs12155-019-10062-1&partnerID=40&md5=cda37da5f360bd188484f7bda9a13d95 },
}
