Effect of Soil Tilth Layer Reconstruction on the Flue-cured Tobacco Agronomic Character and Rhizosphere Soil Microbial Diversity

PurposeTo investigate the growth of flue-cured tobacco and the microbial diversity of rhizosphere soil after the reconstruction of the plough layer.

MethodWe took tobacco soil as the research object to explore the effects of conventional tillage (control, T₁), 0-20 cm and >20-40 cm soil replacement (T₂) and 0-15 cm and >15-30 cm soil replacement (T₃) on rhizosphere soil microbial diversity and growth of flue-cured tobacco.

ResultCompared with T₁, T₂ and T₃ treatments significantly increased plant height, leaf area and leaf yield (P<0.05), and T₂ leaf yield increased by 14.31% compared with T₁; tilth reconstruction improved the richness and diversity of soil bacteria and reduced the richness and diversity of fungi, and the relative abundance of beneficial microorganisms such as Aspergillus, Planctomycetes and Acidobacteria increased significantly (P<0.05).

ConclusionBased on the comprehensive analysis of the relationship between the diversity of soil microorganisms in the rhizosphere and the growth of flue-cured tobacco, the appropriate soil layer reconstruction method (T₂) is an effective measure to improve the soil microecological environment and the quality of tobacco leaves.