2026-02-04 中国科学院（CAS）
＜関連情報＞
- https://english.cas.cn/newsroom/research_news/earth/202602/t20260205_1149839.shtml
- https://www.sciencedirect.com/science/article/abs/pii/S016788092600023X
土壌管理の強度と土壌の種類が土壌リン循環微生物の群集形成と機能的ポテンシャルに及ぼす影響 Effects of soil management intensity and soil type on the community assembly and functional potential of soil phosphorus cycling microbes
Xianwen Long, Xionghui Liao, Jiangnan Li, Wenjun Zhang, Jiachen Wang, Wei Zhang, Kelin Wang, Jie Zhao
Agriculture, Ecosystems & Environment Available online: 13 January 2026
DOI:https://doi.org/10.1016/j.agee.2026.110236
Highlights
- Stochastic processes of P-cycling microbial communities increase with agricultural management intensity.
- High-intensity agricultural management reduced the soil P-cycling microbial functional potential.
- Enhanced stochasticity decouples the link between taxon and functional diversity in P-cycling microbes.
Abstract
Revealing the community assembly process of soil phosphorus (P) cycling microbes is conducive to a better understanding of soil P-cycling processes in agricultural ecosystems. Previous studies have documented that soil microbial diversity or community composition drives soil P cycling. However, little is known about how agricultural management intensity and soil type affect community assembly processes of P-cycling microbes and the related microbial functional potential. Here, four typical agricultural land use types with a gradient of management intensity in both calcareous and red soils were selected in southwest China, including pasture, sugarcane farmland, rice paddy fields, and maize cropland (from low to high management intensity). The results showed that the abundance of the total P-cycling, P-solubilization, P-mineralization, and P-transporter gene in calcareous soil was significantly higher than that in red soil. Agricultural management practice and soil type significantly affected the P-cycling microbial community structure, with tillage frequency, herbicide application frequency, and soil pH being the main influencing factors. Stochastic processes dominated the P-cycling microbial community assembly in both calcareous and red soils, and the stochastic processes were more predominant in calcareous soil than in red soil. The relative importance of stochastic assembly processes increased with agricultural management intensity. In particular, fertilization frequency, pesticide, and herbicide application frequency were the key predictors of stochastic processes of P-cycling microbes. Intensive agricultural management reduced the abundance of total P-cycling, P-solubilization, and P-transporter functional genes across different land use types and soil types but promoted the abundance of P-starvation regulation genes. In particular, we found that the relationship between taxonomic and functional diversity of P-cycling microbes was controlled by deterministic factors (e.g., soil pH and TP), and high stochastic processes will decouple the relationship between the taxonomic and functional diversity of P-cycling microbes. Overall, these findings strengthen our understanding of the community structure and functional potential of P-cycling microbes under different soil types and agricultural management practices.
