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- Title
粉垄耕作木薯根际与非根际土壤的细菌群落结构多样性差异.
- Authors
覃锋燕; 杨慰贤; 彭晓辉; 黎亮武; 阳太亿; 周佳; 韦茂贵; 申章佑
- Abstract
【Objective】The differences in physicochemical properties and bacterial community diversity between cassava rhizosphere and non-rhizosphere soils under pink ridge tillage were analyzed to provide theoretical basis for optimizing existing cassava cultivation methods. 【Method】The cassava was cultivated by conventional tillage and pink ridge tillage. Using high-throughput sequencing technology and bioinformatics methods, combined with soil agrochemical analysis methods, the effects of different tillage methods on cassava rhizosphere and non-rhizosphere soil were analyzed. Influence of properties and diversity of dominant bacterial community structure. 【Result】The Alpha (α) diversity of cassava rhizosphere soil bacterial community was significantly higher than that of non-rhizosphere soil (P<0.05, the same below). The results of permutation multivariate analysis of variance (PERMANOVA) based on unweighted Unifrac distances showed that there were significant differences in the taxonomic and phylogenetic Beta (β) diversity of bacterial communities in the cassava rhizosphere soil and non-rhizosphere soils. The results of species community composition analysis showed that the main dominant bacterial phyla in cassava rhizosphere soil were Actinobacteria, Proteobacteria, Chloroflexbacteria, Firmicutes and Acidobacteria, and the dominant bacterial class was α-Proteobacteria, Actinomycetes, Bacillus and γ-Proteobacteria. At the taxonomic operating unit (OTU) level, there were significant differences in soil bacterial community composition between the cassava rhizosphere and the non-rhizosphere between the powder-row tillage and conventional tillage. The correlation analysis and redundancy analysis (RDA) results of the relative abundance of bacterial communities and environmental factors showed that pH, organic matter content, available phosphorus content and nitrite reductase activity had significant effects on bacterial community changes, especially for Actinobacteria, The distribution of Proteobacteria, Chloroflexbacteria, Firmicutes and Acidobacteria was more obvious. 【Conclusion】The cassava flour ridge tillage method can reduce the stress of cassava by improving the physical structure of the soil tillage layer, so that the pH, organic matter, available phosphorus and available potassium content of the rhizosphere soil are higher than those of the non-rhizosphere soil, thereby causing the bacterial community in the rhizosphere soil. The diversity and richness were higher than those of the non-rhizosphere soil, and the α-diversity of the bacterial community in the rhizosphere soil was significantly higher than that in the non-rhizosphere soil. The difference in bacterial community diversity between cassava rhizosphere soil and non-rhizosphere soil was mainly reflected in the significantly higher abundances of Bacillus, Bacillus, Ellin6067 and Marseille in rhizosphere soil than in non-rhizosphere soil.
- Subjects
MARSEILLE (France); MULTIVARIATE analysis; NITRITE reductase; TILLAGE; CASSAVA growing; BACTERIAL communities; NO-tillage; RHIZOSPHERE microbiology; RHIZOSPHERE
- Publication
Southwest China Journal of Agricultural Sciences, 2022, Vol 35, Issue 4, p729
- ISSN
1001-4829
- Publication type
Article
- DOI
10.16213/j.cnki.scjas.2022.4.001