固碳
环境科学
碱土
土壤水分
生理盐水
碳纤维
期限(时间)
碱金属
土壤碳
生态学
土壤科学
环境化学
化学
二氧化碳
生物
材料科学
内分泌学
物理
量子力学
复合材料
有机化学
复合数
作者
Ziwei Jiang,Pengfei Zhang,Yufei Wu,Xiaodong Wu,Hongwei Ni,Lu Qian,Shuying Zang
标识
DOI:10.1016/j.envres.2023.117425
摘要
Organic composts could remediate saline-alkali soils on agricultural land by amending soil micro-environment which is one of the main strategies for resourceful treatment and recycling of livestock manure. However, it was still unknown how long-term surface application of organic composts affects the microhabitat and bacterial community characteristics and assembly processes on the profile. We examined the features of the soil properties, bacterial community, and assembly models after 7-years composts application. Physicochemical indicators, enzyme activities, and bacterial diversity of the saline-alkali farmland were all enhanced by the surface composts application, particularly in the 0–20 cm. The network analysis showed that the surface application of composts significantly enhanced the robustness and topological characteristics of the bacterial community and that bacteria from Acidobacteriota were the keystone of the saline-alkali soils improvement. Composts also greatly increased the ecological niche of the bacterial community, while stochastic processes (mainly dispersal limitation) significantly shaped the bacterial community compared to the control. Structural equation modeling indicated that composts application promoted bacterial community succession, which in turn promoted elevated total organic carbon and improved saline-alkali soils properties. Overall, the study linked the ecological characteristics of soil microhabitats and bacterial communities during the restoration of saline-alkali soils by long-term surface application of composts, providing the management and remediation of saline-alkali agricultural soil with a theoretical foundation and technological support.
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