Poplar biomass production at phytomanagement sites is significantly enhanced by mycorrhizal inoculation

Effect of mycorrhizal inoculation on metal accumulation by poplar leaves at phytomanaged sites

“…4). Despite this, we measured significant increases in biomass production at both sites for the poplar Skado clone in early spring 2013 (Ciadamidaro et al, 2017). We might therefore conclude that mycorrhizal fungi may have increased the volume of soil explored by single trees, thus allowing for an improved production of biomass.…”

“…2). As discussed in our previous paper (Ciadamidaro et al, 2017), mycorrhizal colonization rates did not differ statistically between the four areas (FL, FH, PL and PH), and therefore cannot explain the lowest accumulations of PTE in leaves of inoculated poplars, as compared with non-inoculated ones. As there are no means (and thereof no attempt) to definitely identify the mycorrhizal isolates that were added as biological amendments to the trees at the plantation, we could only speculate that the mycorrhizal fungi present in the inoculum would be more efficient than the endogenous mycorrhizal fungi in their filtering PTE capacity (by producing more glomalins for example).…”

“…In a recent paper, we demonstrated that ecto-and endomycorrhizal inoculation significantly increased poplar biomass production at phytomanaged sites (Ciadamidaro et al, 2017). In the present study, we hypothesized that the inoculation of poplars with these mycorrhizal fungi would reduce the transfer of PTEs from soil to the aboveground parts of the trees.…”

“…1. Thirty-two plots of 12 m x 18 m each were planted with 1.5m length unrooted cuttings of the two poplar clones, Skado (Populus trichocarpa x P. maximowiczii section Tacahamaca) and I-214 (P. deltoides x P. nigra section Aigeiros), at a spacing of 1.8 m x 2.75 m with a plant density of 2,200 trees ha -1 (Ciadamidaro et al (2017). These two clones were selected for their high biomass production and reduced PTE accumulation in their harvestable parts according to the Phytopop project (Pottier et al, 2015).…”

Trace Metal(oid) Accumulation in Edible Crops and Poplar Cuttings Grown on Dredged Sediment Enriched Soil

“…The organic compounds can often be degraded by soil microorganisms, whereas the TMs show high persistence, although this depends on soil properties that may induce environmental problems. Because one of the major ecological concerns around the experimental site is the production of woody biomass, a large‐scale field trial using woody species (including poplar) has recently been implemented in the site to test the impact of woody cover on metal phytostabilization potential (Ciadamidaro et al, 2017; Phanthavongsa et al, 2017). Although dredged canal sediments are no longer useful for agricultural purposes, we chose this dredged sediment storage facility to design the present study because it offers unique opportunities: (i) the studied area contain contrasting levels of contamination, which could be used to test the effect of soil element content; (ii) the TM mixture that has accumulated in these sediments (mainly As, Cd, Cr, Cu, Ni, Pb, and Zn) is of particular interest for the urban gardening issues; and (iii) the data recorded on poplar in this study will be compared with the long‐term field results.…”