Abstract:Spraying foliar selenium fertilizer is an important way to enrich selenium in crops. The effects of foliar spraying of 0,50,100 g/ha sodium selenite and 6 g/L organic selenium(O-Se)fertilizer at booting stage on yield,agronomic characteristics,dry matter accumulation and distribution,and selenium enrichment ability of spring wheat were determined,and the experiment were used by randomized block design. The results showed that low concentration of sodium selenite(50 g/ha)and organic selenium could significantly increase the yield,biomass,1000-grain weight and grain Se concentration of spring wheat,while spraying with high concentration(100 g/ha)of sodium selenite inhibited the growth in spring wheat. However,the concentration of Se in grains ranged by 0.17~0.885 mg/kg with different concentrations and types of selenium fertilizers,which were all within the safe selenium enrichment standard. The recommended dosage of sodium selenite sprayed on spring wheat leaves at booting stage in central Jilin Province is 50 g/ha.