光照驱动花生间作系统根际细菌群落结构演变和产量提升机制的研究

为探明间作体系中光照条件对矮杆作物产量及根际微生物群落影响的因果关系,本研究依托江苏省农业科学院玉米/花生间作长期试验平台,通过带状间作行朝向设置低光(LL)与高光(HL)条件,利用同位素标记和高通量测序技术,研究不同光照条件下矮杆花生根际光合碳分泌对根际细菌群落结构及作物产量的影响。结果表明：①提高花生冠层光截获增加了花生根际光合碳分配；②光照条件差异引起了花生根际细菌群落结构及关键细菌类群变化；③高光照条件通过改变间作花生根际功能细菌群落提升花生产量。研究结果为优化间作种植管理措施,增加高矮作物间作体系产量提供了新思路。

Light-driven Succession of Rhizosphere Bacterial Community Structure and Yield Enhancement Mechanism in Peanut Intercropping System

To investigate the causal relationship between light conditions on the yield of short crops and the rhizosphere microbial community in the intercropping system, this study relied on the long-term experiment platform of maize/peanut intercropping in the Jiangsu Academy of Agricultural Sciences, and set low-light (LL) Under high light (HL) conditions, isotope labeling and high-throughput sequencing technology were used to study the effects of photosynthesized carbon excrete in the rhizosphere of short peanut on the rhizosphere bacterial community structure and crop yield under different light conditions. The results showed that: 1) increasing the light interception of the peanut canopy increased the allocation of photosynthetic carbon in the peanut rhizosphere; 2) the difference in light conditions caused changes in the bacterial community structure and key bacterial groups in the peanut rhizosphere; 3) high light conditions changed the intercropping peanut rhizosphere functional bacterial community to increase peanut production. The research results provide new perspective for optimizing intercropping management measures and increasing the yield of tall and short crop intercropping systems.