Zhan Jin, Li Yulin, Zhao Xueyong, Yang Hongling, Ning Zhiying, Zhang Rui
Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China.
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.
Front Microbiol. 2023 Mar 27;14:1013570. doi: 10.3389/fmicb.2023.1013570. eCollection 2023.
The plant and soil microbial communities are influenced by variability in environmental conditions (e.g., nitrogen addition); however, it is unclear how long-term nitrogen addition and litter manipulation affect soil microbial communities in a semiarid sandy grassland. Therefore, we simulated the impact of N addition and litter manipulation (litter removal, litter doubling) on plant and soil microbial communities in Horqin grassland, northern China through an experiment from 2014 to 2019. Our results revealed that in the case of non-nitrogen (N0), litter manipulation significantly reduced vegetation coverage (V) ( < 0.05); soil bacterial communities have higher alpha diversity than that of the fungi, and the beta diversity of soil fungi was higher than that of the bacteria; soil microbial alpha diversity was significantly decreased by nitrogen addition (N10) ( < 0.05); N addition and litter manipulation had significantly interactive influences on soil microbial beta diversity, and litter manipulation (C0 and C2) had significantly decreased soil microbial beta diversity ( < 0.05) in the case of nitrogen addition (N10) ( < 0.05). Moreover, bacteria were mostly dominated by the universal phyla Proteobacteria, Actinobacteria, and Acidobacteria, and fungi were only dominated by Ascomycota. Furthermore, the correlation analysis, redundancy analysis (RDA), and variation partitioning analysis indicated that the soil fungi community was more apt to be influenced by plant community diversity. Our results provide evidence that plant and soil microbial community respond differently to the treatments of the 6-year N addition and litter manipulation in a semiarid sandy land.
植物和土壤微生物群落受环境条件变化（如添加氮）的影响；然而，尚不清楚长期添加氮和凋落物处理如何影响半干旱沙地草原的土壤微生物群落。因此，我们通过2014年至2019年的一项实验，模拟了添加氮和凋落物处理（去除凋落物、凋落物加倍）对中国北方科尔沁草原植物和土壤微生物群落的影响。我们的结果表明，在不添加氮（N0）的情况下，凋落物处理显著降低了植被覆盖度（V）（P<0.05）；土壤细菌群落的α多样性高于真菌，土壤真菌的β多样性高于细菌；添加氮（N10）显著降低了土壤微生物的α多样性（P<0.05）；添加氮和凋落物处理对土壤微生物β多样性有显著的交互影响，在添加氮（N10）的情况下，凋落物处理（C0和C2）显著降低了土壤微生物β多样性（P<0.05）（P<0.05）。此外，细菌主要由变形菌门、放线菌门和酸杆菌门等常见门类主导，而真菌仅由子囊菌门主导。此外，相关性分析、冗余分析（RDA）和变异分解分析表明，土壤真菌群落更容易受到植物群落多样性的影响。我们的结果提供了证据，表明植物和土壤微生物群落对半干旱沙地6年添加氮和凋落物处理的响应不同。
Zotero 插件
