This might be attributable to the lack
of metabolizable C and an insignificant N-supplying
capacity (Belyaeva and Haynes, 2012). Biochars immobilized
soil Cd in industrial wastewater treatment,
but did not improve growth of the emerging wetland
plant species (Juncus subsecundus) at the early
growth stage, probably due to the interaction between
biochars and waterlogged environment (Zhang Z et al.,
2013). Further study is needed to elucidate the underlying
mechanisms.