TY - JOUR
T1 - Digestate improved birch (Betula pendula) growth and reduced leaf trace element contents at a red gypsum landfill
AU - Malabad, Abdoulaye Mahamat
AU - Zapata-Carbonell, José
AU - Maurice, Nicolas
AU - Ciadamidaro, Lisa
AU - Pfendler, Stephane
AU - Tatin-Froux, Fabienne
AU - Ferrarini, Andrea
AU - Fornasier, Flavio
AU - Toussaint, Marie-Laure
AU - Parelle, Julien
AU - Chalot, Michel
PY - 2022
Y1 - 2022
N2 - Revegetation of industrial landfills and mine tailing may restore key soil functions and reduce the environmental impacts of contaminants. These marginal sites are often characterized by phytotoxic levels of trace elements (TE) (Cu, Fe, Mn, and Zn) and low nutrient status (N, P, and K). The aim of this study was to test the effect of digestate and bacterial inoculation on soil physicochemical properties (pH, CaCl2 extractable Mn, and microbial enzyme activities) and birch (Betula pendula) growth and physiology on a red gypsum substrate in a lab-to-field experimental approach. The biomass of birches amended with digestate (D0.05% N) was on average 2- and 6-fold greater than that of control birch in the laboratory and field experiments, respectively. A higher concentration of digestate (0.1% N) had an inhibitory effect on plant growth, and reduced the survival rates of amended plants by 40% as compared with controls. The digestate (D0.05% N) treatment significantly increased leaf P and K contents while decreasing leaf Ca, Fe and Mn contents. Digestate also increased some key soil enzyme activities of C, N, P and S metabolism by >10-fold compared with the control soil. In a phytomanagement scenario, digestate would be a preferred amendment resource for the production of clean birch leaf biomass on contaminated red gypsum landfill, as birch trees amended with digestate had lower leaf TE and higher leaf nutrient contents than control birches.
AB - Revegetation of industrial landfills and mine tailing may restore key soil functions and reduce the environmental impacts of contaminants. These marginal sites are often characterized by phytotoxic levels of trace elements (TE) (Cu, Fe, Mn, and Zn) and low nutrient status (N, P, and K). The aim of this study was to test the effect of digestate and bacterial inoculation on soil physicochemical properties (pH, CaCl2 extractable Mn, and microbial enzyme activities) and birch (Betula pendula) growth and physiology on a red gypsum substrate in a lab-to-field experimental approach. The biomass of birches amended with digestate (D0.05% N) was on average 2- and 6-fold greater than that of control birch in the laboratory and field experiments, respectively. A higher concentration of digestate (0.1% N) had an inhibitory effect on plant growth, and reduced the survival rates of amended plants by 40% as compared with controls. The digestate (D0.05% N) treatment significantly increased leaf P and K contents while decreasing leaf Ca, Fe and Mn contents. Digestate also increased some key soil enzyme activities of C, N, P and S metabolism by >10-fold compared with the control soil. In a phytomanagement scenario, digestate would be a preferred amendment resource for the production of clean birch leaf biomass on contaminated red gypsum landfill, as birch trees amended with digestate had lower leaf TE and higher leaf nutrient contents than control birches.
KW - Bacterial inoculum
KW - Betula pendula
KW - Digestate
KW - Manganese
KW - Soil functionalities
KW - Trace element
KW - Bacterial inoculum
KW - Betula pendula
KW - Digestate
KW - Manganese
KW - Soil functionalities
KW - Trace element
UR - http://hdl.handle.net/10807/217945
U2 - 10.1016/j.ecoleng.2022.106815
DO - 10.1016/j.ecoleng.2022.106815
M3 - Article
SN - 0925-8574
VL - 185
SP - 106815-N/A
JO - Ecological Engineering
JF - Ecological Engineering
ER -