Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

Little is known about the effect of nitrogen (N) application via biochar on removal trace elements by crops, and effects with chemical fertilizers are inconsistent. We determined, from a previous study, influence increased N addition biochars produced switchgrass (SGB) poultry litter (PLB) cadmium (Cd) ryegrass. The rates 0, 0.5, 1, 2, 4% w/w were applied to Cd-contaminated soil before seeding in potting experiment complete randomized block design (CRBD). Ryegrass yield Cd removed harvest strongly related (p < 0.05). ryegrass yields up 1% PLB, was also highest at PLB. biomass roots accumulation Overall, transfer factor (TF) shoots when 206 ± 38 kg ha−1 0.0001). PLB might be viable option since it practical rate for handling operations requiring less volume material than SGB. Additionally, concentration aboveground forage remained acceptable grazing cattle. Future studies encouraged evaluate different sources affecting uptake cash crops.