| Effects of different continuous cropping years on diversity of bacterial communities in the rhizosphere soil of potatoes |
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| DOI：10.7606/j.issn.1000-7601.2024.03.21 |
| Key Words: potato continuous cropping years rhizosphere soil bacterial community community diversity |
| Author Name | Affiliation | | XU Peiguo | School of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | XIE Kuizhong | Potato Research Institute of Gansu Academy of Agricultural Sciencesy, Lanzhou, Gansu 730070, China | | HU Xinyuan | School of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Potato Research Institute of Gansu Academy of Agricultural Sciencesy, Lanzhou, Gansu 730070, China | | WANG Wei | School of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | TAN Xuelian | Gansu Academy of Agricultural Sciences Dryland Agriculture Research Institute, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Utilizing long\|term positioning trials, eight treatments were established, involving potato continuous cropping for 1 to 7 years (CP1~CP7) and crop rotation (RT). High\|throughput sequencing was used to explore the effects of different continuous cropping years on the diversity of bacterial communities in the rhizosphere soil of potatoes. The results showed that in the tested soils, Actinobacteria, Proteobacteria, and Firmicutes were the dominant bacterial phyla. As the duration of continuous cropping increased, the number of soil bacteria exhibited a fluctuating trend, and the continuous cropping years influenced the structure of the bacterial community. The RT, CP1, CP2 and CP3 treatments had higher soil bacterial similarity, as did the CP4, CP5, CP6, and CP7 treatments. In the soil after 7 years of continuous potato cropping, the relative abundance of Actinobacteria decreased the most, by 10.47% compared to RT. The relative abundance of Firmicutes significantly dropped in the soil after 6 years of continuous cropping, by 22.07% compared to RT. Nocardioides relative abundance significantly decreased after 7 years of continuous cropping, by 2.34% compared to RT. The relative abundance of Bacillus was the lowest after 6 years of continuous cropping, by 9.18% compared to RT, and decreased by 5.14% after 7 years. The relative abundance of Gemmatimonadaceae_uncultured reached its peak in the soil after 7 years of continuous cropping (16.54%), increasing by 5.26% compared to RT. Long\|term continuous cropping has changed the structure of soil bacterial communities in potatoes, with changes in the types of soil bacterial communities starting after 4 years of continuous cropping, and the community structure altering as a result. The decrease in disease\|preventing bacteria in the soil has increased the risk of potato diseases. |
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