Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (20): 73-80.doi: 10.11924/j.issn.1000-6850.casb2021-0809

Special Issue: 生物技术 资源与环境

Previous Articles     Next Articles

Effects of Four Annual Rotation Patterns on Soil Microbial Community

ZHANG Heqing1(), WU Jie1, HAN Shuai1, XI Yadong1(), LI Yuejian2, LIANG Genyun2   

  1. 1Institute of Plant Protection, Sichuan Academy of Agriculture Sciences/Key Laboratory of Integrated Pest Management on Crops in Southwest, Ministry of Agriculture and Rural Affairs, Chengdu 610066
    2Horticulture of Research Institute, Sichuan Academy of Agriculture Sciences/Vegetable Germplasm Innovation and Variety Improvement Key Laboratory of Sichuan Province, Chengdu 610066
  • Received:2021-08-20 Revised:2021-11-04 Online:2022-07-15 Published:2022-08-23
  • Contact: XI Yadong E-mail:759214612@qq.com;xiyadong2002@126.com

Abstract:

To clarify the changes of soil microbial community in the cultivated layer under different crop rotation patterns, and to reveal the potential mechanism of paddy and dry crop rotation which is beneficial to the sustainable production of vegetables, in this paper, we designed 4 common crop rotation patterns, fixed the test plots in the same geographic area for long-term crop rotation experiments, and used high-throughput sequencing technology to determine the sequence of the ITS1 region of fungi in the soil and the V3-V4 variable region sequence of the 16S rDNA of bacteria. Soil microbial diversity analysis was conducted. Alpha diversity analysis shows that the soil fungal community diversity in the cultivated layer changes significantly under the four annual rotation patterns, and the Shannon index of the water and dry rotation pattern (SH) is significantly higher than that of the graft pattern (JJ) and vegetable rotation LZ pattern (LZ), and has no significant difference with vegetable rotation LD pattern (LD). The diversity and richness of soil bacterial communities in the cultivated layer change significantly. The Shannon index and ACE index of the SH pattern are significantly higher than those of the LD pattern, and the Shannon index of the SH pattern is significantly higher than that of other patterns. The principal coordinate analysis shows that among the four annual rotation patterns, the soil microbial communities in the cultivated layer are significantly differentiated. The SH and LZ patterns are grouped separately, and the JJ and LD patterns are grouped together. Significant analysis of species differences between groups shows that the SH pattern has 7 genera of fungi and 26 genera of bacteria that are significantly richer than other patterns; the LD and LZ have 4 genera of fungi and 7 genera of bacteria, respectively, their abundance is significantly higher than other patterns; only one genus of bacteria in JJ pattern has significantly higher abundance than other patterns. Significant changes take place in the soil microbial communities in the cultivated layer under long-term annual rotations of different crop rotation patterns. Long-term paddy-upland rotation could increase the diversity of soil microbial communities, enrich the types and relative abundance of beneficial bacteria, and is more conducive to the sustainable production of vegetables.

Key words: paddy-upland rotation, microbial diversity, high-throughput sequencing, cucumber, blight, Fusarium

CLC Number: