Responses of Bacterial Communities in Arable Soils in a Rice-Wheat Cropping System to Different Fertilizer Regimes and Sampling Times

Soil physicochemical properties, soil microbial biomass and bacterial community structures in a rice-wheat cropping system subjected to different fertilizer regimes were investigated in two seasons (June and October). All fertilizer regimes increased the soil microbial biomass carbon and nitrogen. B...

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Veröffentlicht in:PloS one Jg. 9; H. 1; S. e85301
Hauptverfasser: Zhao, Jun, Ni, Tian, Li, Yong, Xiong, Wu, Ran, Wei, Shen, Biao, Shen, Qirong, Zhang, Ruifu
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States Public Library of Science 20.01.2014
Public Library of Science (PLoS)
Schlagworte:
Agricultural management
Agriculture
Agrochemicals
Analysis
Animal wastes
Annual variations
Arable land
Bacteria
Bacteria - drug effects
Bacteria - growth & development
Biology
Biomass
Cereal crops
Cluster analysis
Collaboration
Communities
Community structure
Cropping systems
Engineering
Enzymes
Fertilizers
Fertilizers - adverse effects
Food production
Forest soils
Laboratories
Manure
Manures
Mineral fertilizers
Multivariate analysis
Nitrogen
Nutrient availability
Nutrients
Nutrients in soil
Nutrition
Organic fertilizers
Organic matter
Oryza
pH effects
Phosphate fertilizers
Physicochemical properties
Rice
Seasonal variations
Seasons
Soil carbon
Soil Microbiology
Soil microorganisms
Soil nutrients
Soil properties
Soils
Sustainable food systems
Sustainable practices
Sustainable production
Taxa
Triticum
Wheat
Wheat industry
China
Yangtze River
ISSN:1932-6203, 1932-6203
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Zusammenfassung:Soil physicochemical properties, soil microbial biomass and bacterial community structures in a rice-wheat cropping system subjected to different fertilizer regimes were investigated in two seasons (June and October). All fertilizer regimes increased the soil microbial biomass carbon and nitrogen. Both fertilizer regime and time had a significant effect on soil physicochemical properties and bacterial community structure. The combined application of inorganic fertilizer and manure organic-inorganic fertilizer significantly enhanced the bacterial diversity in both seasons. The bacterial communities across all samples were dominated by Proteobacteria, Acidobacteria and Chloroflexi at the phylum level. Permutational multivariate analysis confirmed that both fertilizer treatment and season were significant factors in the variation of the composition of the bacterial community. Hierarchical cluster analysis based on Bray-Curtis distances further revealed that bacterial communities were separated primarily by season. The effect of fertilizer treatment is significant (P = 0.005) and accounts for 7.43% of the total variation in bacterial community. Soil nutrients (e.g., available K, total N, total P and organic matter) rather than pH showed significant correlation with the majority of abundant taxa. In conclusion, both fertilizer treatment and seasonal changes affect soil properties, microbial biomass and bacterial community structure. The application of NPK plus manure organic-inorganic fertilizer may be a sound fertilizer practice for sustainable food production.
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Competing Interests: The authors have declared that no competing interests exist.
Conceived and designed the experiments: WR BS RZ QS. Performed the experiments: JZ TN WX YL. Analyzed the data: JZ. Contributed reagents/materials/analysis tools: RZ QS. Wrote the paper: JZ RZ QS.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0085301