Response of Microbial Diversity in Soil under Plastic Shed to Different Years of Continuous Cropping

• Published in: Eurasian soil science Vol. 55; no. 11; pp. 1598 - 1608
• Main Authors: Jingjing Li, Xu, Yongbo, Zhao, Jun, Yin, Xinhua, Xu, Zhuoying
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-11-2022; Springer; Springer Nature B.V
• Subjects: Abundance; Acidic soils; Acidification; Acidobacteria; Actinobacteria; Analysis; Ascomycota; Bacteria; Barriers; Biological diversity; Carbon content; Chloroflexi; Community composition; Composition; Continuous cropping; Correlation analysis; Cropping systems; Earth and Environmental Science; Earth Sciences; Environmental factors; Fungi; Fusarium; Geotechnical Engineering & Applied Earth Sciences; Microorganisms; Next-generation sequencing; Nitrogen; Organic carbon; Organic phosphorus; Organic soils; pH effects; Phosphorus; Potassium; Proteobacteria; Slope stability; Soil acidification; Soil acidity; Soil analysis; Soil Biology; Soil chemistry; Soil microbiology; Soil microorganisms; Soil pH; Soil stability; Soil structure; Soils; Dominant taxa; microbial diversity; High-throughput sequencing; Community composition
• ISSN: 1064-2293; 1556-195X
• DOI: 10.1134/S1064229322110072

This study aimed to investigate the changes in bacterial and fungal community composition and its relationship with environmental factors in the red soil (Ferralsols) under different continuous cropping years. Changes in composition and diversity of bacterial and fungal communities in lily red soil from continuous cropping for 4 years (C4), 5 years (C5), and 7 years (C7) were studied by MiSeq high-throughput sequencing. Alpha diversity analysis showed that the Shannon and Simpson diversity indexes were significantly increased for bacteria and significantly decreased for fungi, respectively, in the red soil under protected lily cultivation with the extension of continuous cropping. In the analysis of microbial community composition, the dominant bacterial phyla were
Proteobacteria
,
Actinobacteria
,
Acidobacteria
, and
Chloroflexi
. Those dominant bacterial phyla in C4, C5, and C7 accounted for 85.17, 81.04, and 81.64% of the total bacterial community, respectively. Among the fungi, only
Ascomycota
was the dominant taxa, and the dominant taxa in C4, C5, and C7 accounted for 93.69, 92.20, and 84.31% of the total fungi community, respectively. The abundance of
Fusarium ascomycetes
was 44.02–58.83% in these three soils. Correlation analysis showed that soil pH, organic carbon, and total nitrogen were significantly related to the abundance of
Proteobacteria
,
Actinobacteria,
and
Acidobacteria
. The pH value was positively correlated with
Penicillium
and negatively correlated with
Fusarium
. Environmental factors such as pH, total nitrogen (TN), soil organic carbon (SOC), available phosphorus, and available potassium affect the composition of the soil microbial community by influencing the dominant bacteria phyla. The decrease in pH after continuous cropping leads to soil acidification, which affects the soil microbial community, which in turn reduces soil stability. The results of this study showed that the diversity index of soil bacterial microbial community increased significantly after continuous cropping, and the diversity of the fungal microbial community decreased significantly. Soil pH is the key factor to predict the structure of soil microbial community and to regulate the continuous cropping obstacle reasonably. Meanwhile, the dominant bacterial phyla were
Proteobacteria, Actinobacteria, Acidobacteria
, and
Chloroflexi
.
Fusarium
dominated in the Ascomycota after continuous cropping, which might be one of the main reasons for the continuous cropping obstacle in facility lily red soil.