Soil fertility and bacterial community composition in a semiarid Mediterranean agricultural soil under long‐term tillage management

2020 ◽  
Vol 36 (4) ◽  
pp. 604-615
Author(s):  
Mohammad Yaghoubi Khanghahi ◽  
Giovanna Cucci ◽  
Giovanni Lacolla ◽  
Loredana Lanzellotti ◽  
Carmine Crecchio
Keyword(s):  
Bacterial Community ◽  
Soil Fertility ◽  
Community Composition ◽  
Agricultural Soil ◽  
Bacterial Community Composition

scholarly journals Activity and Composition of the Denitrifying Bacterial Community Respond Differently to Long-Term Fertilization

2005 ◽  
Vol 71 (12) ◽  
pp. 8335-8343 ◽  
Author(s):  
Karin Enwall ◽  
Laurent Philippot ◽  
Sara Hallin
Keyword(s):  
Sewage Sludge ◽  
Bacterial Community ◽  
Soil Respiration ◽  
Community Composition ◽  
Bacterial Community Composition ◽  
Arable Soil ◽  
Functional Markers ◽  
Potential Denitrification ◽  
Basal Soil Respiration

ABSTRACT The objective of this study was to explore the long-term effects of different organic and inorganic fertilizers on activity and composition of the denitrifying and total bacterial communities in arable soil. Soil from the following six treatments was analyzed in an experimental field site established in 1956: cattle manure, sewage sludge, Ca(NO3)2, (NH4)2SO4, and unfertilized and unfertilized bare fallow. All plots but the fallow were planted with corn. The activity was measured in terms of potential denitrification rate and basal soil respiration. The nosZ and narG genes were used as functional markers of the denitrifying community, and the composition was analyzed using denaturing gradient gel electrophoresis of nosZ and restriction fragment length polymorphism of narG, together with cloning and sequencing. A fingerprint of the total bacterial community was assessed by ribosomal intergenic spacer region analysis (RISA). The potential denitrification rates were higher in plots treated with organic fertilizer than in those with only mineral fertilizer. The basal soil respiration rates were positively correlated to soil carbon content, and the highest rates were found in the plots with the addition of sewage sludge. Fingerprints of the nosZ and narG genes, as well as the RISA, showed significant differences in the corresponding communities in the plots treated with (NH4)2SO4 and sewage sludge, which exhibited the lowest pH. In contrast, similar patterns were observed among the other four treatments, unfertilized plots with and without crops and the plots treated with Ca(NO3)2 or with manure. This study shows that the addition of different fertilizers affects both the activity and the composition of the denitrifying communities in arable soil on a long-term basis. However, the treatments in which the denitrifying and bacterial community composition differed the most did not correspond to treatments with the most different activities, showing that potential activity was uncoupled to community composition.

The effect of long-term nitrate treatment on SRB activity, corrosion rate and bacterial community composition in offshore water injection systems

2008 ◽  
Vol 35 (12) ◽  
pp. 1625-1636 ◽  
Author(s):  
Gunhild Bødtker ◽  
Tore Thorstenson ◽  
Bente-Lise P. Lillebø ◽  
Bente E. Thorbjørnsen ◽  
Rikke Helen Ulvøen ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Corrosion Rate ◽  
Community Composition ◽  
Bacterial Community Composition ◽  
Water Injection ◽  
Offshore Water ◽  
Nitrate Treatment

scholarly journals The total and active bacterial community of the chlorolichen Cetraria islandica and its response to long-term warming in sub-Arctic tundra

2020 ◽  
Author(s):  
Ingeborg J. Klarenberg ◽  
Christoph Keuschnig ◽  
Denis Warshan ◽  
Ingibjörg Svala Jónsdóttir ◽  
Oddur Vilhelmsson
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Relative Abundance ◽  
Environmental Conditions ◽  
Bacterial Community Composition ◽  
Arctic Tundra ◽  
Amplicon Sequencing ◽  
Total Community ◽  
First Time

AbstractLichens are traditionally defined as a symbiosis between a fungus and a green alga and or a cyanobacterium. This idea has been challenged by the discovery of bacterial communities inhabiting the lichen thalli. These bacteria are thought to contribute to the survival of lichens under extreme and changing environmental conditions. How these changing environmental conditions affect the lichen-associated bacterial community composition remains unclear.We describe the total (rDNA-based) and potentially metabolically active (rRNA-based) bacterial community of the lichen Cetaria islandica and its response to long-term warming using a 20-year warming experiment in an Icelandic sub-Arctic tundra. 16S rRNA and rDNA amplicon sequencing showed that the orders Acetobacterales (of the class Alphaproteobacteria) and Acidobacteriales (of the phylum Acidobacteria) dominated the bacterial community. Numerous ASVs (amplicon sequence variants) taxa could only be detected in the potentially active community but not in the total community. Long-term warming led to increases in relative abundance on class, order and ASV level. Warming altered the relative abundance of ASVs of the most common bacterial genera, such as Granulicella and Endobacter. The potentially metabolically active bacterial community was also more responsive to warming than the total community.Our results suggest that the bacterial community of the lichen C. islandica is dominated by acidophilic taxa and harbors disproportionally active rare taxa. We also show for the first time that climate warming can lead to shifts in lichen-associated bacterial community composition.

scholarly journals Effect of long-term mineral fertilizer application on soil enzyme activities and bacterial community composition

2018 ◽  
Vol 64 (No. 12) ◽  
pp. 571-577 ◽  
Author(s):  
Chen Yanling ◽  
Liu Jintao ◽  
Liu Shutang
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Enzyme Activities ◽  
Bacterial Community Composition ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
N Fertilizer ◽  
Soil Bacterial Community ◽  
Soil Bacterial

Soil bacteria are critical to maintain soil fertility. In this study, soil chemical properties, enzyme activities and soil bacterial community from a long-term fertilizer experiment (37 years) were analysed to elaborate the effects of long-term mineral fertilizer application on soil enzyme activities and bacterial community composition. Compared with control treatment, bacterial community richness was reduced in low nitrogen (N) fertilizer and high N fertilizer treatments and increased in high N fertilizer and phosphorus (P), high N fertilizer and potassium (K) (N2K), and high N fertilizer, P and K (N2PK) treatments. The distribution of each phylum and genera was obviously changed and the range of the dominant phyla was not affected in all fertilization treatments. Principal component analysis showed that soil bacterial community in the N2K treatment was clearly different than in the N2PK treatment. The N2PK treatment had much higher available P, total organic carbon, invertase, urease and phosphatase activities than the N2K treatment, which might change soil bacterial community composition. In conclusion, fertilization with combined application of P, K and N in appropriate proportions is an optimum approach for improving soil quality and soil bacterial community abundance in non-calcareous fluro-aquic soils in the North China Plain.

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