[Mechanism and Effects of Soil Immobilization-foliar Inhibition Systems on Alleviating Cd in Accumulation Wheat Grains].

by 10.71%， which increased soil pH and reduced the proportion of F1-Cd by 14.17% and accordingly enlarged the proportions of carbonate-bound Cd and iron-manganese-bound Cd by 10.41% and 11.00%， respectively. Additionally， T1 decreased root-Cd and Cd bio-accumulation factor of roots by 52.04% and 49.99%， respectively. Foliar application of EDTA-Zn during the grain-filling stage significantly reduced the Cd translocation factor from stem-leaf to rachis （at maturity） and from glume to grain （during grain-filling stage） by 45.45% and 31.29%， respectively. Finally， T1 significantly alleviated grain-Cd and Cd accumulation in wheat grains. In summary， the better pathway for effectively reducing Cd accumulation in wheat grains consists of applying apricot kernel biochar before sowing and foliar spraying of EDTA-Zn during the grain-filling stage in moderate Cd-contaminated farmland. These findings provide an effective and technical pathway for ensuring wheat grain safety production and guaranteeing safety utilization of Cd-contaminated agricultural land in the calcareous soil of North China.