摘要
In order to elucidate the response mechanism of yield and quality of different genotypes of foxtail millet to nitrogen application.In this study,plant physiology and metabolomics were used to study the effects of different amounts of nitrogen(0,75,150,225 and 300 kg hm^(-2))on agronomic characters,yield and quality of Jingu 21 and Zhangza 10.The results showed that with the increase of nitrogen application,the plant height of different genotypes of foxtail millet increased gradually,and the content of stem diameter,yield,protein,fat,lysine,phenylalanine,isoleucine,arginine,aspartic,glutamic,glycine,and proline content of different genotypes of foxtail millet showed an increasing and then decreasing trend.The highest yield was recorded in Jingu 21 at 150 kg hm^(-2),and the highest yield was recorded in Zhangza 10 at 225 kg hm^(-2) of nitrogen application.Yield of Jingu 21 was positively correlated with protein and tryptophan content(r=0.91).The yield of Zhangza 10 was positively correlated with fibre content(r=0.89).The protein content of different genotypes of foxtail millet were negatively correlated with the peak viscosity(PV),trough viscosity(TV)and breakdown value(BD).The results of this study clarify that the optimal nitrogen application of Jinguu 21 was 150 kg hm^(-2),and that of Zhangza 10 was 225 kg hm^(-2).The regulation effect of nitrogen on foxtail millet was clarified,which laid the theoretical and technical foundation for foxtail millet cultivation with high yield and high quality.
基金
funded by the earmarked fund for CARS(CARS-06-14.5-A16)
the Shanxi Provincial Key Research and Development Program(Program No.2022ZDYF110)
the earmarked fund for Modern Agro-Industry Technology Research System(2024CYJSTX03-23)
the Central Guided Local Science and Technology Development Funds(YDZJSX2022A044,YDZJSX20231A040).
