PDF(Pubmed)
Abstract：
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.
摘要：
化肥投入是有效的森林管理措施之一，改善土壤养分和微生物群落组成，提高森林生产力。然而,很少有研究探索根际土壤微生物群落对跨季节动态的各种施肥方案的响应。这里,我们收集了Phoebebournei种植园的根际土壤样品，以研究群落组合和土壤微生物组的微生物相互作用对短期施用四种典型肥料实践（包括化学肥料（CF），有机肥（OF），复合微生物肥料（CMF），并且没有肥料控制（CK））。有机肥和复合微生物肥的改良改变了根际土壤细菌和真菌群落的组成，分别。施肥制度显着影响细菌多样性，而不是真菌多样性，根际真菌对季节的反应比细菌更敏感。受精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，漂移和扩散限制主导了土壤真菌和细菌群落，分别。总的来说，这些发现表明了对群落组合的反应以及根际细菌和真菌对肥料实践的相互作用。有机施肥的应用加强了微生物的相互作用，并改变了根际生境中关键分类群的演替。关键要点：•施肥改变了关键分类群和微生物相互作用•有机肥料促进了根际微生物群落的周转•随机性控制了土壤真菌和细菌群落的组装。
