关键词: 生物有机硒, 玉米, 农艺经济性状, 硒含量

Abstract: In order to study the effect of bio-organic selenium on selenium enrichment and agronomic and economic characters of maize, the maize was treated by foliar spraying under different concentration and dosage at maize tasseling stage, and the content of total selenium and organic selenium in maize kernel and its agronomic and economic characters were measured. The results showed that different treatments had different effects on plant characters, panicle characters and sugar content of maize. Among the nine treatments, plant height of A1B1 was lower than CK, while that of other treatments was higher than CK in plant height and panicle height. Among the 7 panicle characters investigated, 9 treatments of panicle diameter, kernels per row, one hundred grain weight and bald tip length were all better than CK, but 9 treatments showed different performance compared with CK in panicle length, rows per panicle and grain depth. Six of the nine treatments increased sugar content compared with CK, among which A1B3 and A2B3 increased significantly by 3.97%. Compared with CK, the selenium content of all treatments increased significantly and reached the standard of selenium-rich maize, in addition, the proportion of organic selenium processed in seven treatments has reached more than 80% specified in the local standard of Hubei province for food safety, “The Selenium Content Requirements for Organic Selenium-rich Food” （DBS42/002—2014）. This study provided reference for reasonable spraying of bio-organic selenium in maize.

Key words: bio-organic selenium, maize, agronomic and economic characters, selenium content