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| Response of bacterial communities to different agronomic regulation measures in purple mud paddy fields |
| Received:June 08, 2021 |
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| KeyWord:lime;organic fertilizer;conditioner;bacteria community structure;high-throughput sequencing |
| Author Name | Affiliation | E-mail | | ZHONG Junjie | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | LI Xiaojing | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | YIN Zerun | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | SHENG Hao | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | NIE Sanan | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | sanie@hunau.edu.cn |
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| Abstract: |
| This study was conducted to investigate the response of soil bacterial community structure characteristics to different agronomic measures, as well as the relationship between community structure and soil environmental factors. Three treatments including lime, commercial organic fertilizer, and soil conditioner were set in purple mud paddy fields. The 16S rRNA gene of soil bacteria was sequenced, and the effects of different treatments on bacterial community composition and diversity were analyzed. The results showed that different agronomic measures changed the composition and diversity of soil bacterial communities. Compared with the control, the organic fertilizer and conditioner treatments increased the bacterial α diversity index value in soil; however, the lime treatment decreased this value. The bacterial α diversity value after the lime and organic fertilizer treatment was significantly higher than that after the conditioner treatment. Compared with that in the control soil, the relative abundance of Acidobacteria increased by 64.77%, 95.69% and 67.52% in the lime-, organic fertilizer-, and conditioner-treated soils, respectively. The relative abundances of Proteobacteria and Nitrospira increased by 10.40% and 11.99% after the lime treatment, whereas they decreased by 9.17% and 43.06% after the organic fertilizer treatment and decreased by 10.67% and 31.07% after conditioner treatment, respectively. Principal component analysis results showed that the bacterial community structure of the lime-and organic fertilizer-treated soils was similar to that of the control soil. Conversely, conditioner treatment substantially changed the soil bacterial community structure. The redundancy analysis indicated that the bacterial community structure was mainly affected by soil pH and total potassium but was marginally affected by soil cation exchange capacity(CEC), total phosphorus(TP), available Cd, total nitrogen(TN), microbial biomass carbon(MBC), and soil organic carbon(SOC). The composition and diversity of bacterial community structure in purple mud paddy soils undergo changes as responses to different agronomic control measures, thus providing a theoretical basis for developing strategies to improve agricultural production function of purple mud paddy soils. |
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