Abstract:
Objective Boron (B) can reduce the toxicity of heavy metals to crops. However, it is not clear the effects of different B fertilizer applications on alleviating cadmium (Cd) uptake by winter wheat under field conditions. The effects of different B fertilizer application treatments on the growth and development of winter wheat were investigated under Cd toxicity with field expriment, in order to provide a theoretical basis for the rational application of B fertilizer to alleviate the Cd toxicity in winter wheat grains.
Method A conventional wheat variety (Bainong 207) was selected in the field experiment. Four treatments were set as (1) no B added (CK), (2) basal B added (TS), (3) foliar spraying B treatment with 0.3% concentration (F0.3%), (4) foliar spraying B treatment with 0.6% concentration (F0.6%). The grain yield, 1000-grain weight, grain number per ear, ear number per acre, Cd, B, mineral elements and other heavy metals content (Ni, As, Pb, Se, Sn and Sb) of winter wheat at the maturity stage were analyzed under different treatments.
Result The results showed that the yield of winter wheat under TS, F0.3% and F0.6% treatments increased 662 kg hm−2, 588 kg hm−2 and 329 kg hm−2 compared with CK treatment, respectively. The concentration of B in grains were all increased under B treatment. The TS treatment and F0.6% treatment significantly decreased the concentration of Cd in grains of winter wheat by 47.9% and 29.9%, respectively. Compared with CK treatment, the TS, F0.3% and F0.6% treatments significantly decreased the concentrations of K, Ca and Fe in grains, while increased the concentrations of Cu and Zn in grains. Meanwhile, the concentrations of Ni, As and Pb in winter wheat grains were significantly decreased by B fertilizer application.
Conclusion The yield of winter wheat could be incrased by both TS treatment and F0.6% treatment, and the accumulation of Cd could be significantly reduced in grains.
下载: