Effects of Miscanthus on soil physicochemical characteristics and microbial community composition in saline-alkali soil

ZHANG Zhe, ZONG Junqin, LI Ling, LU Hailong, XUE Jianhui

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2026, Vol. 50 ›› Issue (1) : 50-57.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2026, Vol. 50 ›› Issue (1) : 50-57. DOI: 10.12302/j.issn.1000-2006.202504004

Effects of Miscanthus on soil physicochemical characteristics and microbial community composition in saline-alkali soil

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Abstract

【Objective】 To investigate the effects of planting different Miscanthus species on the physicochemical properties of saline-alkali soil and the composition and structure of the microbial community, thus providing a basis for selecting suitable Miscanthus species for ecological restoration of saline-alkali land.【Method】Rhizosphere soil, non-rhizosphere soil, and bare land (CK) soil samples were collected from the planting sites of five Miscanthus species: Miscanthus sinensis, Miscanthus sacchariflorus, Miscanthus floridulus, Miscanthus lutarioriparius, and Miscanthus × longiberbis. Soil physicochemical properties were measured, and high-throughput sequencing technology was employed to analyze the composition of the soil microbial community.【Result】Compared with bare land soil, planting Miscanthus significantly improved the soil environment: soil water content increased in the planting sites of all five Miscanthus species, with a significant increase of 40.4% in the Miscanthus sinensis planting site. Soil pH and total salt content decreased, with a 2.6% reduction in pH in the M. × longiberbis planting site compared to CK, and a significant 83.9% reduction in total salt content in the M. sacchariflorus planting site. The contents of organic carbon, total nitrogen, and available phosphorus increased. While no significant differences were observed in microbial community α diversity, the community composition and structure underwent significant changes, with Pseudomonadota being the dominant phylum. The relative abundances of Acidobacteriota, Actinobacteriota, and Chloroflexota significantly increased, whereas those of Gemmatimonadota and Cyanobacteria significantly decreased. 【Conclusion】Planting Miscanthus effectively ameliorates the physicochemical properties of saline-alkali soil, enhances soil fertility, and optimizes microbial community structure. Among the tested species, M. sacchariflorus exhibited the best overall improvement effects. The findings of this study provide a theoretical basis and practical guidance for selecting Miscanthus species in the ecological restoration of saline-alkali land.

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Miscanthus spp. / saline land / soil physical and chemical properties / microbial community composition

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ZHANG Zhe , ZONG Junqin , LI Ling , et al . Effects of Miscanthus on soil physicochemical characteristics and microbial community composition in saline-alkali soil[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2026, 50(1): 50-57 https://doi.org/10.12302/j.issn.1000-2006.202504004

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