Abstract: Two rice varieties with large planting areas in this region were used to set different selenium fertilizer application concentration tests for one kind of selenium fertilizer widely used in the market in Jianghan plain area. By means of field experiment, laboratory analysis and biostatistics, the application effect was studied. The test results showed thatSelenium content in rice could be significantly increased by spraying selenium-rich fertilizer on the leaf surface for three times in the booting stage, breaking stage and grouting stage; There was no significant difference in selenium content between the two application concentrations;With the same spraying concentration, there were significant differences in selenium content between rice varieties. in addition, selenium fertilizer could increase plant height, grain number and yield of rice, but the difference was not significant. Spraying selenium fertilizer can significantly improve rice production efficiency. The best treatment with the best effect and benefit to improve the selenium content in rice was to spray the selenium enriched fertilizer on the leaf surface for three times at the booting stage, the fracture stage and the grouting stage at a concentration of 900 mL/hm².

Key words: rice, selenium-rich special fertilizer, yield, selenium content, benefits