Effect of selenium foliar application on yield of seed of oilseed rape

In small-plot field experiments the effect of foliar application of different forms of selenium (sodium selenite and sodium selenate) at Se dose 20 g per hectare on seed yield of oilseed rape (locality of Viglas-Pstrusa) during experimental year 2015/2016 was investigated. Foliar spray application of Se was applied at the growth stage before flowering (59 BBCH). The average results showed that selenium applied as selenite sodium or selenate sodium at dose 20 g Se per hectare resulted in increase seed yield of oilseed rape by 22.0% or. 22.7% compared with unfertilized control treatment, but this increase of yield was not statistically significant.