Abstract:Exogenous selenium (Se) input is one of the most important ways to improve Se content in rice. A pot experiment was conducted to study the effects of exogenous Se input with different materials to soil on rice growth, Se adsorption, transportation and accumulation by rice. The treatments were designed as follows : three fertilization patterns of chemical fertilizer (F), F + organic fertilizer (FO) and F + biochar (FC); four exogenous selenium(IV) levels of 0 mg/kg soil (Se0), 0.2 mg/kg soil (Se1), 0.4 mg/kg soil (Se2) and 0.6 mg/kg soil (Se3). The results showed that appropriate exogenous Se didn′t influence significantly rice yield and biomass, but improved Se content in rice significantly and promoted Se in stems and leaves transported to grain. FO and FC treatments decreased root absorption index (RAI) of Se. FO treatment hindered Se in stems and leaves transported to rice grains, but input of appropriate exogenous Se with FC could enhance it. In a word, FO and FC treatments could not improve Se content in the above-ground part of rice, especially reduced Se content in rice grain. Organic fertilizer improved rice yield significantly so it accumulated more Se in rice biomass, but biochar had no such effect. Exogenous Se utilization by rice is below 5%.