Influence of strip cutting management on soil bacterial community structure and diversity in Phyllostachys edulis stands

WANG Shumei, WANG Bo, FAN Shaohui, XIAO Xiao, XIA Wen, GUAN Fengying

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (2) : 60-68.

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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (2) : 60-68. DOI: 10.12302/j.issn.1000-2006.202004038

Influence of strip cutting management on soil bacterial community structure and diversity in Phyllostachys edulis stands

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Abstract

【Objective】In order to provide scientific guidance for understanding the management of bamboo (Phyllostachys edulis) forests stands and restoration of soil ecosystems, the impact of strip cutting on soil bacterial community structure and diversity was studied. 【Method】Soil samples were collected from P. edulis stands of different widths (3, 9 and 15 m) after 25 d at Yixing, Jiangsu Province. V3-V4 regions were sequenced using the Illumina MiSeq High Throughput Sequencing to identify soil bacteria and predict functional groups. Soil organic matter, total N, total P, total K, available N, available P and available K were analyzed using standard methods.【Result】With the increase in cutting width, the contents of soil available P, total K, and available K decreased, while the contents of soil organic matter, and total and available N initially increased and then decreased. The selection of the appropriate cutting width could improve soil fertility, but when the cutting width exceeded a certain limit, the soil fertility and the content of available nutrients decreased. Strip cutting management had an impact on the soil bacterial abundance, diversity and evenness. At a cutting width of 3 m, the soil bacterial community was richer, and species distribution was more uniform than others. With the increase in the cutting width, the bacterial community richness and uniformity in the P. edulis forest decreased. When the cutting width exceeded a certain level, the difference in species composition between communities decreased. Strip cutting increased the diversity of Proteobacteria and decreased that of Acidobacteria and Chloroflexi. Proteobacteria, Actinobacteria, Acidobacteria and chloroflexi belong to the same functional group in the stripped soil of the bamboo forest, stimulating carbon and nitrogen fixation and the transformation and decomposition of other nutrients. The main metabolic pathways after strip cutting were carbohydrate and amino acid production.【Conclusion】Comprehensive analyses showed that strip cutting of P. edulis forests had a significant influence on the soil bacterial community structure and diversity. The shorter width (3 m) strip cutting could increase the abundance and diversity of soil bacteria and nutrient content. However, with the increase in strip-cutting width, the various indicators decreased. After strip cutting, soil microbial groups mainly acted on the fixation, decomposition, and transformation of C and N.

Key words

Phyllostachys edulis / strip cutting / soil bacteria / bacterial biodiversity / bacterial community richness / function prediction

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WANG Shumei , WANG Bo , FAN Shaohui , et al . Influence of strip cutting management on soil bacterial community structure and diversity in Phyllostachys edulis stands[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2021, 45(2): 60-68 https://doi.org/10.12302/j.issn.1000-2006.202004038

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