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Open AccessArticle

Short-Term Response of Soil Microbial Community to Field Conversion from Dryland to Paddy under the Land Consolidation Process in North China

1
School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221043, China
2
Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221008, China
3
Geospatial Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3000, Australia
*
Author to whom correspondence should be addressed.
Agriculture 2019, 9(10), 216; https://doi.org/10.3390/agriculture9100216
Received: 31 July 2019 / Revised: 28 September 2019 / Accepted: 1 October 2019 / Published: 4 October 2019
Land consolidation of dryland-to-paddy conversion for improving tillage conditions and grain production capacity is widely implemented throughout the world. The conversion affects soil ecological stability, especially the most active soil microorganisms. However, the impacts of the dryland-to-paddy conversion has paid little attention in recent decades. In this study, a pot experiment was used to explore the responses of the microbial community and their interactions with soil properties after rice in the first season (five months). The results indicated that a significant decrease in the topsoil pH, organic matter content, nitrate nitrogen, and ammonical nitrogen, and an increase in soil electrical conductivity (EC) was observed (p < 0.05) after the dryland-to-paddy conversion. The richness and diversity of bacteria and fungi decreased in the short term. The composition of the soil microbial community and the soil microbial dominant bacteria had considerably changed after the conversion. Actinobacteria, Firmicutes, and Olpidiomycota were found to be highly sensitive to the dryland-to-paddy conversion. The soil microbial community structure had extremely significant positive correlations with soil pH, EC, organic matter, nitrate nitrogen, and ammonical nitrogen (p < 0.05). Microorganisms are the most important component of soil nutrient cycling. Converting a large area of dryland to paddy may lead to an imbalance in the soil carbonitride cycle and should be further examined in North China. View Full-Text
Keywords: land consolidation; soil microorganisms; high-throughput sequencing; bacterial diversity; fungal diversity land consolidation; soil microorganisms; high-throughput sequencing; bacterial diversity; fungal diversity
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Li, X.; Ma, J.; Yang, Y.; Hou, H.; Liu, G.-J.; Chen, F. Short-Term Response of Soil Microbial Community to Field Conversion from Dryland to Paddy under the Land Consolidation Process in North China. Agriculture 2019, 9, 216.

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