Abstract:

In order to explore the allelopathy between millet and giant foxtail growth, the effects of different concentrations of water extracts on foxtail millet seed germination and seedling growth were studied by using‘Jinxuan 6’and ‘Setaria viridis’ as experimental materials. The results showed that different concentrations of water extracts have‘low promotion and high inhibition’on seed germination and seedling growth. Compared with the control, the emergence rate was decreased by 13.888%, and the allelopathic index was -0.139 under the treatment of original solution. The comprehensive indexes of root length, bud length, fresh weight and dry weight were -0.070 and -0.034 under the treatment of original solution and 10 times diluted solution, which showed allelopathic inhibition, meanwhile the total length, leaf area, chlorophyll content and SOD of plant were lower than those of the control. The emergence rate was increased by 33.333% and 11.117% under the treatment of 50 and 100 times diluted solution, and the comprehensive indexes of root length, bud length, fresh weight and dry weight were 0.275 and 0.153, which showed allelopathic promotion. Among them, the 50 times diluted solution had the strongest promotion, the total length, leaf area, chlorophyll content and SOD of plant were significantly different from the control. The millet field is often accompanied by a large number of giant foxtail, the results will provide a theoretical basis for removing the giant foxtail at the seedling stage.

Key words: millet, water extract, giant foxtail, allelopathic effects, seed germination, seedling growth