Effects of wheat straw derived biochar on cadmium availability in a paddy soil and its accumulation in rice

This study was carried out to investigate the effect of biochar amendment on cadmium (Cd) availability in a paddy soil with biochar amendment and its effect on the accumulation in rice. Biochar was applied once at rates of 0 (A0), 10 (A10), 20 (A20), 30 (A30), and 40 (A40) t ha−1 on the soil surface layer (0–17 cm). Results showed that the soil organic matter (SOM) content and pH in 0–17 cm soil layer increased as biochar application rate...