| Effects of potato continuous cropping on soil fungal community characteristics |
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| DOI：10.7606/j.issn.1000-7601.2022.04.21 |
| Key Words: potato continuous cropping soil fungal community structure |
| Author Name | Affiliation | | HU Xinyuan | Gansu Academy of Agricultural Sciences/ Innovation Engineering Laboratory of Potato Germplasm Resources of Gansu Province, Lanzhou, Gansu 730070, China | | TAN Xuelian | Institute of Dryland Agriculture, Gansu Academy of Agricultural Sciences/ Key Laboratory of Efficient Utilization of Water in Dry Farming of Gansu Province, Lanzhou, Gansu 730070, China | | SUN Xiaohua | Potato Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | XIE Kuizhong | Potato Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LIU Yongqiang | Potato Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In this study, a long\|term field positioning experiment was used to study the succession characteristics of soil fungal community structure in potato/spring wheat/soybean rotation (R), potato continuous cropping for 1 year (C1), 3 years (C3), 5 years (C5), 7 years (C7) and 9 years (C9) based on ITS high\|throughput sequencing in 2019.The results showed that with the increase of continuous cropping years, the richness and Chao1 of soil fungi increased significantly.The richness of C7 and C9 soil fungi was the highest, while the richness of R soil fungi was the lowest.The similarity of C7 and C9 fungal communities was higher, but the similarity of C7 and C9 fungal communities was lower than that of R. The fungal population structure of C1, C3 and C5 were between C7, C9 and R.At the class level, the similarity of soil fungal communities was divided into two groups: C7 and C9 in one group, and R, C1, C3 and C5 in one group.A total of 273 fungal genera were detected in potato soil of different continuous cropping years, among which 13 fungal genera were significantly different. The number of Penicillium in C5, C7 and C9 soil was significantly higher than that in R soil.The relative abundance of Metarhizium in C5, C7 and C9 was significantly higher than that of R, C1 and C3, while the relative abundance of Fusaruim in C5 was the highest, significantly higher than that of R, C1, C3, C7 and C9.The distribution of fungal community changed after 5 years of continuous potato cropping.Penicillium and Metarhizium were enriched and Fusaruim specieswere reduced in long\|term continuous cropping farmland.The degree of continuous cropping obstacle tended to be reduced. |
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