Effects of Nitrogen Fixation and Nitrogen Deposition on Soil Microbial Communities
Author Information
Author(s): Liu Xin, Yang Rong, Zhao Jie, Xiao Dan, He Xunyang, Zhang Wei, Wang Kelin, Chen Hongsong, Bidochka Michael J.
Primary Institution: School of Advanced Agricultural Sciences, Weifang University
Hypothesis
Legume plant introduction would increase the bacterial and fungal biomass and change the soil microbial community composition in karst grassland ecosystems, and nitrogen deposition would suppress the soil microbial community biomass.
Conclusion
The introduction of legume plants is beneficial for increasing the biomass of the soil microbial community and stabilizing the soil microbial community structure in karst grassland ecosystems.
Supporting Evidence
- Legume plant introduction significantly increased soil microbial biomass.
- N deposition significantly reduced the biomass of bacteria, actinobacteria, and arbuscular mycorrhizal fungi.
- The total amounts of PLFAs were significantly higher in legume plant introduction than in nitrogen deposition.
Takeaway
This study shows that planting legume plants helps soil microbes grow better, while adding nitrogen from the atmosphere can harm them.
Methodology
The study analyzed soil microbial phospholipid fatty acids (PLFAs) over five years with three treatments: legume plant introduction, nitrogen deposition, and a control.
Limitations
The study was conducted in a specific geographic area, which may limit the generalizability of the findings.
Statistical Information
P-Value
p = 0.030 for total PLFAs
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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