Bacterial and fungal communities regulated directly and indirectly by tobacco-rape rotation promote tobacco production

Continuous cropping, a prevalent practice in intensive agriculture, often leads to soil barriers and decreases crop productivity over time. Crop rotation as a sustainable management has been employed widely to address these challenges. However, little is known about the role of microbes under tobacco-rape rotation in affecting soil productivity. The study investigated the bacterial and fungal diversity, community composition, and co-occurrence networks through high throughput sequencing technology, as well as the relationship among tobacco yield, microbial community structures, soil properties, and by the structural equation modeling.连作（continuous cropping）作为集约化农业中的普遍种植模式，长期实施往往会引发土壤连作障碍并降低作物生产力。作物轮作（crop rotation）作为一种可持续的农田管理措施，已被广泛应用以应对此类问题。然而，目前对于烟-油菜轮作（tobacco-rape rotation）体系下微生物影响土壤生产力的作用机制仍知之甚少。本研究通过高通量测序技术（high throughput sequencing technology）分析了细菌与真菌的多样性、群落组成及共现网络（co-occurrence networks），并借助结构方程模型（structural equation modeling）解析了烟草产量、微生物群落结构与土壤性质之间的相互关联。