Effects of Formula Fertilizer and Biochar on Cadmium and Plumbum Absorption in Maize (Zea mays L.)

Effective, economical and feasible remediation technology of heavy metal pollution in farmland is an important research concentration the field soil remediation. In order to investigate effects formula fertilizer biochar on cadmium (Cd)–plumbum (Pb) contaminated farmland, blank (CK), lime (SH), (SWT), (FL), + (FS) were set up Cd–Pb farmland. The results demonstrated following: (1) Compared with CK, SWT FS increased yield by 11.21% 15.00%, respectively, which was significantly higher than other treatments. (2) concentrations Cd Pb maize kernels under all treatments lower limited value stipulated GB 2762-2022 China. reduced 24.96% 31.46%, most significant. All can reduce cob straw inhibit transfer from part overground part. (3) FL, SWT, pH 0.17, 0.10, 0.19 units, respectively. available (DTPA-Cd) lead (DTPA-Pb) significantly, are 31.05% 38.57% (4) Each treatment extraction state reducible weak acid soil, while increasing proportion oxidizable residual state. FL percentage 18.00% 24.32%, 33.33% 37.76%, (5) (1.747) (1.679) relatively CK input/output. conclusion, combined application Cd/Pb polluted effectively has high economic benefits practicability.