关键词: 谷子, 硒含量, 产量, 保护酶活性, 富硒矿粉

Abstract: In order to study the effect of selenium mineral powder application on the protective enzyme activity, yield and selenium content of millet, by Jingu 21 and Zhangzagu 10 as experimental materials, this paper carried out a field experiment to study the effects of different dosage selenium mineral powder (0, 204, 394.8, 789.45 kg·hm^-2)on the growth and development of millet and the selenium content in grain. The results showed that: with the increase in the amount of selenium mineral powder, the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in the leaf of millet at each growth stage showed an increase first and then a decrease trend, the content of malondialdehyde (MDA) decreased first and then increased, and both reached the extreme value during T2 treatment. Compared with the control, the T2 treatment had the most significant effect on the ear weight, ear grain weight, 1 000-grain weight and yield of millet. The yield of Jingu 21 and Zhangzagu 10 increased by 8.64% and 664%, respectively. The application of selenium mineral powder could increase the selenium content in millet grains. Under T2 treatment, the selenium content in Jingu 21 grains reached the highest 0.131 mg·kg^-1, which was 3.5 times higher than the control. Soil selenium application of 394.8 kg·hm^-2 could be used as the recommended application rate of selenium mineral powder in the production of selenium-rich millet.

Key words: foxtail millet, selenium content, yield, protective enzyme activity, rich selenium mineral powder