Response of soil microbial community structure to increased precipitation and nitrogen addition in a semiarid meadow steppe

2017 ◽  
Vol 68 (4) ◽  
pp. 524-536 ◽  
Author(s):  
S. Sun ◽  
H. Zhao ◽  
F. Xing ◽  
Z. Bai ◽  
Y. Gao ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Soil Microbial Community ◽  
Nitrogen Addition ◽  
Meadow Steppe ◽  
Soil Microbial Community Structure ◽  
Soil Microbial

scholarly journals Microbial regulation of soil carbon properties under nitrogen addition and plant inputs removal

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7343
Author(s):  
Ran Wu ◽  
Xiaoqin Cheng ◽  
Wensong Zhou ◽  
Hairong Han
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Biomass ◽  
Soil Carbon ◽  
Microbial Community Structure ◽  
Soil Microbial Community ◽  
Soil Microbial Communities ◽  
Nitrogen Addition ◽  
Soil Microbial Community Structure ◽  
Soil Microbial

Background Soil microbial communities and their associated enzyme activities play key roles in carbon cycling in terrestrial ecosystems. Soil microbial communities are sensitive to resource availability, but the mechanisms of microbial regulation have not been thoroughly investigated. Here, we tested the mechanistic relationships between microbial responses and multiple interacting resources. Methods We examined soil carbon properties, soil microbial community structure and carbon-related functions under nitrogen addition and plant inputs removal (litter removal (NL), root trench and litter removal (NRL)) in a pure Larix principis-rupprechtii plantation in northern China. Results We found that nitrogen addition affected the soil microbial community structure, and that microbial biomass increased significantly once 100 kg ha−1 a−1 of nitrogen was added. The interactions between nitrogen addition and plant inputs removal significantly affected soil bacteria and their enzymatic activities (oxidases). The NL treatment enhanced soil microbial biomass under nitrogen addition. We also found that the biomass of gram-negative bacteria and saprotrophic fungi directly affected the soil microbial functions related to carbon turnover. The biomass of gram-negative bacteria and peroxidase activity were key factors controlling soil carbon dynamics. The interactions between nitrogen addition and plant inputs removal strengthened the correlation between the hydrolases and soil carbon. Conclusions This study showed that nitrogen addition and plant inputs removal could alter soil enzyme activities and further affect soil carbon turnover via microbial regulation. The increase in soil microbial biomass and the microbial regulation of soil carbon both need to be considered when developing effective sustainable forest management practices for northern China. Moreover, further studies are also needed to exactly understand how the complex interaction between the plant and below-ground processes affects the soil microbial community structure.

Impact of organic and inorganic nanomaterials in the soil microbial community structure

2012 ◽  
Vol 424 ◽  
pp. 344-350 ◽  
Author(s):  
Verónica Nogueira ◽  
Isabel Lopes ◽  
Teresa Rocha-Santos ◽  
Ana L. Santos ◽  
Graça M. Rasteiro ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Soil Microbial Community ◽  
Soil Microbial Community Structure ◽  
Soil Microbial ◽  
Inorganic Nanomaterials

Effect of maize rhizodeposits on soil microbial community structure

2002 ◽  
Vol 21 (3) ◽  
pp. 261-265 ◽  
Author(s):  
E Benizri ◽  
O Dedourge ◽  
C Dibattista-Leboeuf ◽  
S Piutti ◽  
C Nguyen ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Soil Microbial Community ◽  
Soil Microbial Community Structure ◽  
Soil Microbial
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