Effects of different mineral element type leaf barrier agents on the absorption and transport of cadmium in spring wheat
In order to study the effect of spraying different foliar barrier on the control of cadmium in spring wheat in northern fields,'Yongliang 4'was used as the material,and four different mineral elemental foliar barrier agents were sprayed on wheat at the tillering stage and the spike stage,namely,mixed type(MAC),manganese-zinc elemental type(MZ),sulphur elemental type(S),and silicon elemental type(Si),and the foliar barrier agents were applied at the tillering stage and spike stage,at the same time,water spraying was set as the control,and the blocking and controlling effects of different foliar barrier agents on cadmium in wheat were analyzed by determining the cadmium content in various organs of wheat.The results showed that:(1)Compared with the water control,four different mineral element type of foliar barrier agents effectively reduced the cadmium content in wheat grains,of which,MZ,S treatment made the cadmium reduced in the grains significantly,and the cadmium reduction ability of the four foliar barrier agents was ranked as MZ＞S＞Si＞MAC,which reduced the cadmium content in the grains by 47.7％,40.1％,33.3％and 26.5％,respectively.(2)The Cd enrichment coefficients of various organs of wheat were ranked as root＞stem＞leaf＞glume＞seed,and the foliar spraying of all four mineral-element-based barrier agents inhibited the enrichment ability of wheat seed,while MAC and MZ increased the enrichment ability of wheat root and inhibited the accumulation of Cd in leaves.(3)MAC and MZ barrier agents inhibited cadmium transfer from root to stem,while S and Si treatments mainly inhibited cadmium transport from leaf to seed.Therefore,in terms of blocking Cd contamination in wheat by foliar spraying of barrier agents,spraying of MZ and S types of foliar barrier agents could be selected.
foliar barrier agentsspring wheatcadmium contentenrichment and transport
万方数据
维普
