关键词: 谷子, 出谷率, 硒含量, 硒代胱氨酸, 硒代蛋氨酸

Abstract: In order to guide the rational use of selenium fertilizer in the production of selenium-enriched millet and to explore the effects of organic selenium fertilizer (bioselenium-enriched synergist) and inorganic selenium fertilizer (sodium selenite) on the growth of millet and selenium absorption in grains, the effects of different selenium fertilizers（15、30、60、120 g·hm^-2） on ear characteristics, grain selenium content, selenium existing form and lutein content of millet were analyzed by spraying different concentrations of organic selenium fertilizer and inorganic selenium fertilizer, sodium selenite, on the leaf surface of millet. The results showed that the leaf spraying of two kinds of selenium fertilizers could increase  grain yield and grain selenium content, and the effect of inorganic selenium fertilizer was better than that of organic selenium fertilizer. The millet yield treated with inorganic selenium fertilizer of 60 g·hm^-2 reached to 92.80%, and the selenium content reached to 1.09 mg·kg^-1. The analysis on  selenium morphology showed that selenium in millet grain was mainly in the organic form including selenocystine and selenomethionine. The content of organic selenium in the inorganic selenium fertilizer treatment was higher than that in the organic selenium fertilizer one. No significant effect was found of selenium on the lutein content of millet grains. The results showed that, compared with the organic selenium, sodium selenite was a better selenium fertilizer for producing selenium-enriched millet.

Key words: millet, yield, selenium content, selenocystine, selenomethionine