Effect of Nitrogen Management on Soil Microbial Community and Enzymatic Activities in <i>Jatropha curcas</i> L. Plantation

Chaudhary, Doongar R.; Gautam, Ritesh Kumar; Ghosh, Arup; Chikara, J.; Jha, Bhavanath

doi:10.1002/clen.201400357

Cited by 8 publications

(2 citation statements)

References 54 publications

(94 reference statements)

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“…Physicochemical conditions, including pH, temperature, oxidation‐reduction potential (ORP), carbon sources, and nutrient levels vary with depth in aquatic environments, likely resulting in shifts in microbial communities. [ 7,8 ] While there is much interest in the longitudinal characteristics of microbial composition and diversity, our understanding of the vertical patterns of the diversity and distribution of microbial assemblages in urban rivers is lacking. [ 9 ] Reservoirs and lakes have long been the region of choice for studying vertical biopatterns and functions of microbial communities.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Microbial Ecological Functions in Response to Vertical Gradients in a Polluted Urban River

Cai

et al. 2021

CLEAN Soil Air Water

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Sharp vertical environmental gradients could differentially affect the structure and function of microbes. Here, the authors provide some of the first insights into the vertical distribution of microbial functions in a polluted urban river using Geochip 5.0 microarray. A total of 89 615 functional genes belonging to 1213 categories are detected in Jinchuan River in China. Genes involved in metal homeostasis, stress response, carbon cycling, antibiotic resistance, and organic contaminant degradation are the primary gene categories detected and comprise 24.63%, 15.20%, 14.17%, 10.59%, and 8.03% of total genes. There are no significant differences in the abundance of functional gene groups at varying depths. Different gene categories showed small fluctuations in their metabolic potentials at varying depths. Functional gene diversity in bottom water and sediment layers is higher than in surface layers. Additionally, functional potentials of antibiotic resistance, organic contaminant degradation, and pigment genes are stronger in water than in sediment, while those of nitrogen cycling and microbial defense increased with depth. The surface sediment layer and surface water layer have the greatest metabolic potential for the carbon cycle and organic pollutant degradation processes, respectively. The middle sediment layer has the highest potential for the nitrogen and phosphorus cycles.

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Section: Introductionmentioning

confidence: 99%

Exploring the Microbial Ecological Functions in Response to Vertical Gradients in a Polluted Urban River

Cai

et al. 2021

CLEAN Soil Air Water

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“…Nitrogen management in agricultural systems has a strong impact on soil quality and the soil microbiome (8)(9)(10)(11). Urea fertilizer, otherwise known as carbamide CO(NH 2 ) 2 , is the most common synthetic nitrogen source applied to agricultural soils to meet crop N requirements (12).…”

Section: Introductionmentioning

confidence: 99%

A Single Application of Compost Can Leave Lasting Impacts on Soil Microbial Community Structure and Alter Cross-Domain Interaction Networks

Heisey¹,

Ryals

Maaz

et al. 2022

Front. Soil Sci.

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Our current understanding suggests that nutrient management strategies applied to agricultural soils over multiple years are required to cause major and stable shifts in soil microbial communities. However, some studies suggest that agricultural soils can benefit even from sporadic, single additions of organic matter. Here we investigate how single additions of high-quality organic matter can cause significant shifts in microbial soil communities over multiple cropping cycles. We grew radishes in a tropical Oxisol soil for six crop cycles after a single application of a high-nitrogen compost or urea. At planting and before biomass harvest, we sampled soils influenced by the radish rhizosphere and sequenced bacterial and archaeal 16S and fungal ITS rDNA marker genes. We measured microbial richness and diversity, community composition and structure, and constructed correlation networks to predict cross-domain microbial interactions. We found that a single application of compost, compared to urea or control, resulted in a persistent improved plant biomass response and led to sustained changes in the soil microbial community throughout the duration of the 227-day study. Compost altered the structure of both the fungal and prokaryotic microbial communities, introduced new microorganisms that persisted in the resident soil system, and altered soil microbial correlation network structure and hub taxa. In contrast, fertilization with urea did not significantly alter the structure of soil microbial communities compared to the control but reduced network complexity and altered hub taxa. This study highlights the significant impacts that high-quality organic matter fertilization can exert on agricultural soil microbiomes and adds to the growing body of knowledge on using organic fertilizers as a way to steer the soil microbiome toward a healthier soil.

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Organic Amendments in a Long-term Field Trial—Consequences for the Bulk Soil Bacterial Community as Revealed by Network Analysis

et al. 2017

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This study intended to elucidate the long-term effects of organic soil amendments on bacterial co-occurrence in bulk soil with and without addition of mineral fertiliser. Previous research mostly neglected the bacterial co-occurrence structure and focussed mainly on the parameters species diversity and abundance changes of species. Here we present a systematic comparison of two frequently used soil amendments, manure and straw, with regard to their impact on bacterial co-occurrence in a long-term field trial in Speyer, Germany. The approach involved 16S amplicon sequencing in combination with a bacterial network analysis, comparing the different fertiliser regimes. The results show an increase of bacterial diversity as well as an accumulation of bacteria of the order Bacillales in plots fertilised with manure compared to a control treatment. In the straw-amended plots neither an increase in diversity was found nor were indicative species detectable. Furthermore, network analysis revealed a clear impact of mineral fertiliser addition on bacterial co-occurrence structure. Most importantly, both organic amendments increased network complexity irrespective of mineral fertilisation regime. At the same time, the effects of manure and straw exhibited differences that might be explained by differences in their nutritional/chemical contents. It is concluded that bacterial interactions are a crucial parameter for the assessment of amendment effects regarding soil health and sustainability.

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Effect of Nitrogen Management on Soil Microbial Community and Enzymatic Activities in Jatropha curcas L. Plantation

Cited by 8 publications

References 54 publications

Exploring the Microbial Ecological Functions in Response to Vertical Gradients in a Polluted Urban River

Exploring the Microbial Ecological Functions in Response to Vertical Gradients in a Polluted Urban River

A Single Application of Compost Can Leave Lasting Impacts on Soil Microbial Community Structure and Alter Cross-Domain Interaction Networks

Organic Amendments in a Long-term Field Trial—Consequences for the Bulk Soil Bacterial Community as Revealed by Network Analysis

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