College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China.
The Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling, Xianyang, 712100, Shaanxi, China.
Microb Ecol. 2022 Jan;83(1):114-126. doi: 10.1007/s00248-021-01740-9. Epub 2021 Mar 20.
Soil microorganisms play an important role in the circulation of materials and nutrients between plants and soil ecosystems, but the drivers of microbial community composition and diversity remain uncertain in different vegetation restoration patterns. We studied soil physicochemical properties (i.e., soil moisture, bulk density, pH, soil nutrients, available nutrients), plant characteristics (i.e., Shannon index [H] and Richness index [S], litter biomass [LB], and fine root biomass [FRB]), and microbial variables (biomass, enzyme activity, diversity, and composition of bacterial and fungal communities) in different plant succession patterns (Robinia pseudoacacia [MF], Caragana korshinskii [SF], and grassland [GL]) on the Loess Plateau. The herb communities, soil microbial biomass, and enzyme activities were strongly affected by vegetation restoration, and soil bacterial and fungal communities were significantly different from each other at the sites. Correlation analysis showed that LB and FRB were significantly positively correlated with the Chao index of soil bacteria, soil microbial biomass, enzyme activities, Proteobacteria, Zygomycota, and Cercozoa, while negatively correlated with Actinobacteria and Basidiomycota. In addition, soil water content (SW), pH, and nutrients have important effects on the bacterial and fungal diversities, as well as Acidobacteria, Proteobacteria, Actinobacteria, Nitrospirae, Zygomycota, and microbial biomass. Furthermore, plant characteristics and soil properties modulated the composition and diversity of soil microorganisms, respectively. Overall, the relative contribution of vegetation and soil to the diversity and composition of soil bacterial and fungal communities illustrated that plant characteristics and soil properties may synergistically modulate soil microbial communities, and the composition and diversity of soil bacterial and fungal communities mainly depend on plant biomass and soil nutrients.
土壤微生物在植物和土壤生态系统之间的物质和养分循环中起着重要作用，但不同植被恢复模式下微生物群落组成和多样性的驱动因素仍不确定。我们研究了不同植物演替模式（刺槐 [MF]、柠条 [SF] 和草地 [GL]）下土壤理化性质（即土壤水分、容重、pH 值、土壤养分、有效养分）、植物特征（即 Shannon 指数 [H]和丰富度指数 [S]、凋落物生物量 [LB] 和细根生物量 [FRB]）和微生物变量（生物量、酶活性、多样性以及细菌和真菌群落组成）。草本群落、土壤微生物生物量和酶活性受到植被恢复的强烈影响，土壤细菌和真菌群落之间存在显著差异。相关分析表明，LB 和 FRB 与土壤细菌的 Chao 指数、土壤微生物生物量、酶活性、变形菌门、接合菌门和 Cercozoa 呈显著正相关，与放线菌门和担子菌门呈显著负相关。此外，土壤含水量（SW）、pH 值和养分对细菌和真菌的多样性以及酸杆菌门、变形菌门、放线菌门、硝化螺旋菌门、接合菌门和微生物生物量有重要影响。此外，植物特征和土壤性质分别调节了土壤微生物的组成和多样性。总的来说，植被和土壤对土壤细菌和真菌群落多样性和组成的相对贡献表明，植物特征和土壤性质可能协同调节土壤微生物群落，土壤细菌和真菌群落的组成和多样性主要取决于植物生物量和土壤养分。
