School of Forestry, Central South University of Forestry and Technology, 410004, Changsha, People's Republic of China.
Appl Microbiol Biotechnol. 2024 Jul 12;108(1):417. doi: 10.1007/s00253-024-13106-5.
Fertilizer input is one of the effective forest management practices, which improves soil nutrients and microbial community compositions and promotes forest productivity. However, few studies have explored the response of rhizosphere soil microbial communities to various fertilization regimes across seasonal dynamics. Here, we collected the rhizosphere soil samples from Phoebe bournei plantations to investigate the response of community assemblages and microbial interactions of the soil microbiome to the short-term application of four typical fertilizer practices (including chemical fertilizer (CF), organic fertilizer (OF), compound microbial fertilizer (CMF), and no fertilizer control (CK)). The amendments of organic fertilizer and compound microbial fertilizer altered the composition of rhizosphere soil bacterial and fungal communities, respectively. The fertilization regime significantly affected bacterial diversity rather than fungal diversity, and rhizosphere fungi responded more sensitively than bacteria to season. Fertilization-induced fungal networks were more complex than bacterial networks. Stochastic processes governed both rhizosphere soil bacterial and fungal communities, and drift and dispersal limitation dominated soil fungal and bacterial communities, respectively. Collectively, these findings demonstrate contrasting responses to community assemblages and interactions of rhizosphere bacteria and fungi to fertilizer practices. The application of organic fertilization strengthens microbial interactions and changes the succession of key taxa in the rhizosphere habitat. KEY POINTS: • Fertilization altered the key taxa and microbial interaction • Organic fertilizer facilitated the turnover of rhizosphere microbial communities • Stochasticity governed soil fungal and bacterial community assembly.
肥料投入是有效的森林管理措施之一，它可以改善土壤养分和微生物群落组成，促进森林生产力。然而，很少有研究探讨过根际土壤微生物群落对各种施肥制度的季节性动态变化的响应。在这里，我们从闽楠人工林采集了根际土壤样本，以研究土壤微生物组对短期应用四种典型肥料处理（包括化肥（CF）、有机肥（OF）、复合微生物肥（CMF）和不施肥对照（CK））的群落组合和微生物相互作用的响应。有机肥和复合微生物肥的添加分别改变了根际土壤细菌和真菌群落的组成。施肥制度显著影响细菌多样性而不是真菌多样性，根际真菌对季节的响应比细菌更敏感。施肥诱导的真菌网络比细菌网络更复杂。随机过程控制着根际土壤细菌和真菌群落，而扩散限制和漂变分别主导着土壤真菌和细菌群落。总的来说，这些发现表明，根际细菌和真菌对施肥措施的群落组成和相互作用存在相反的响应。有机施肥的应用增强了微生物相互作用，并改变了根际生境中关键类群的演替。关键点：•施肥改变了关键类群和微生物相互作用•有机肥促进了根际微生物群落的周转•随机性控制着土壤真菌和细菌群落的组装。
