Root System Architecture of Salix miyabeana 'SX67' and Relationships with Aboveground Biomass Yields
| Autor: | Nicolas Bélanger, François Courchesne, Alexandre Collin, Mario Fontana, Michel Labrecque |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
biology Renewable Energy Sustainability and the Environment 020209 energy Quadratic model 02 engineering and technology Root system biology.organism_classification 01 natural sciences Plant ecology Cutting Salix miyabeana Agronomy 010608 biotechnology Soil water 0202 electrical engineering electronic engineering information engineering Root system architecture Environmental science Aboveground biomass Agronomy and Crop Science Energy (miscellaneous) |
| Zdroj: | BioEnergy Research. 13:183-196 |
| ISSN: | 1939-1242 1939-1234 |
| Popis: | 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 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink