Changes in the bacterial community structure in soil under conventional and conservation practices throughout a complete maize (Zea mays L.) crop cycle

Romero-Salas, Edson A.; Navarro‐Noya, Yendi E.; Luna‐Guido, Marco; Verhulst, Nele; Crossa, José; Govaerts, Bram; Dendooven, Luc

doi:10.1016/j.apsoil.2020.103733

Cited by 16 publications

(6 citation statements)

References 72 publications

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“…Srour et al ( 5 ) reported that conventional tillage had a larger effect on the soil bacterial community structure than other factors, such as fertilization, in a long-term maize-soybean rotation field experiment as found in numerous other studies ( 29 – 32 ). Although Srour et al ( 5 ) and many others (e.g., [ 33 ]), including investigations at ‘El Batán’ ( 16 , 27 , 28 ), reported no effect of tillage on diversity and/or species richness, in this new study we found a large negative effect. This observation can be explained, in part, by the method used to calculate diversity.…”

Section: Discussioncontrasting

confidence: 80%

“…In CP only roots and about 10 cm maize stubble were incorporated in soil and in CA all residues of maize and wheat plants were left on the soil surface. We have shown in previous studies at ‘ El Batán ’, that agricultural practices can have a large effect on the bacterial community structure although with large variations over time ( 27 , 28 ). In this study, a partition analysis of variance revealed that 41.5% of the observed variance was explained by the agricultural practices applied to the system.…”

Section: Discussionmentioning

confidence: 77%

“…Experimental designs in agronomy, plant breeding and agriculture, therefore, often use two replicates to reduce costs while still allowing to test for significant differences between treatments ( 53 , 54 ). Two replicated plots have been used at el Batán since 1991 to reduce cost while providing enough information to determine which agricultural practices, i.e., conventional practices versus conservation agriculture, improve yields and how they affect soil characteristics, greenhouse gas emissions and microbial communities (e.g., [ 15 , 16 , 27 , 28 , 55 ]).…”

Section: Methodsmentioning

confidence: 99%

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Bacterial Communities in the Rhizosphere at Different Growth Stages of Maize Cultivated in Soil Under Conventional and Conservation Agricultural Practices

et al. 2022

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We studied the effect of sustainable conservation agricultural practices versus intensive conventional ones on the soil microbial diversity, potential functionality, and community assembly in rhizosphere of maize cultivated in a semiarid environment. We found that conservation agriculture practices increased the diversity of soil microbial species and functions and strongly affected how they were structured compared to conventional practices.

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Section: Discussioncontrasting

confidence: 80%

Section: Discussionmentioning

confidence: 77%

Section: Methodsmentioning

confidence: 99%

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Bacterial Communities in the Rhizosphere at Different Growth Stages of Maize Cultivated in Soil Under Conventional and Conservation Agricultural Practices

et al. 2022

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“…nitrate concentrations) drove marked shifts in bacterial composition over the corn growing season (Romero‐Salas et al . 2021). In our study, macronutrient concentrations declined over the growing season and bacterial communities responded strongly to these changes.…”

Section: Discussionmentioning

confidence: 99%

Cascading effects of composts and cover crops on soil chemistry, bacterial communities and the survival of foodborne pathogens

Devarajan

McGarvey

Scow

et al. 2021

Journal of Applied Microbiology

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Aims Recent foodborne disease outbreaks have caused farmers to re‐evaluate their practices. In particular, concern that soil amendments could introduce foodborne pathogens onto farms and promote their survival in soils has led farmers to reduce or eliminate the application of animal‐based composts. However, organic amendments (such as composts and cover crops) could bolster food safety by increasing soil microbial diversity and activity, which can act as competitors or antagonists and reduce pathogen survival. Methods and Results Leveraging a study of a 27‐year experiment comparing organic and conventional soil management, we evaluate the impacts of composted poultry litter and cover crops on soil chemistry, bacterial communities and survival of Salmonella enterica and Listeria monocytogenes. We found that bacterial community composition strongly affected pathogen survival in soils. Specifically, organic soils managed with cover crops and composts hosted more macronutrients and bacterial communities that were better able to suppress Salmonella and Listeria. For example, after incubating soils for 10 days at 20°C, soils without composts retained fourfold to fivefold more Salmonella compared to compost‐amended soils. However, treatment effects dissipated as bacterial communities converged over the growing season. Conclusions Our results suggest that composts and cover crops may be used to build healthy soils without increasing foodborne pathogen survival. Significance and Impact of the Study Our work suggests that animal‐based composts do not promote pathogen survival and may even promote bacterial communities that suppress pathogens. Critically, proper composting techniques are known to reduce pathogen populations in biological soil amendments of animal origin, which can reduce the risks of introducing pathogens to farm fields in soil amendments. Thus, animal‐based composts and cover crops may be a safe alternative to conventional fertilizers, both because of the known benefits of composts for soil health and because it may be possible to apply amendments in such a way that food‐safety risks are mitigated rather than exacerbated.

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“…In contrast, the relative abundance of Chloroflexi was higher at F0. Studies have reported that Chloroflexi is oligotrophic, adapted to nutrient-limited environments, and sensitive to changes in nitrogen and carbon levels ( Trivedi et al, 2016 ; Dai et al, 2019 ; Romero-Salas et al, 2021 ). In contrast, Actinobacteria can rapidly decompose organic matter, which increases levels of carbon and other nutrients to improve the soil environment.…”

Section: Discussionmentioning

confidence: 99%

Synergistic effects of rhizosphere effect and combined organic and chemical fertilizers application on soil bacterial diversity and community structure in oilseed rape cultivation

Wang,

Qin,

Zhang

et al. 2024

Front. Microbiol.

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The combined application of chemical and organic fertilizers has been recognized to enhance soil fertility and foster the soil microbial ecosystem. However, the optimal ratio of chemical and organic fertilizers in oilseed rape cultivation is still uncertain, and the role of rhizosphere effect is still unclear. Thus, this study aimed to elucidate the impacts of varying ratios of chemical and organic fertilizers on the structure and potential functionalities of rhizosphere and non-rhizosphere soil microbial communities. The interplay of microbial communities with soil properties and oilseed rape root exudates was investigated in controlled pot cultivations receiving varying ratios of chemical and organic fertilizers. Results indicated clear segregation in the soil bacterial community, influenced by both fertilization treatments and rhizosphere effects. The bacterial community structure significantly correlated with nitrate nitrogen, organic acids, and dissolved organic carbon (DOC) content. Rhizosphere effects led to increased bacteria abundance, reduced diversity, and decreased network stability. Notably, F3 treatment receiving 25% chemical and 75% organic fertilizers showed a significantly higher abundance at 1.43 × 1011 copies g−1 dry soil, accompanied by increased species and genetic diversity, and ecological network complexity. This treatment also yielded the highest aboveground biomass of oilseed rape. However, the application of organic fertilizers also increased the risk of plant pathogenicity. This study reveals the impact of fertilizers and rhizosphere effects on soil microbial community structure and function, shedding light on the establishment of more effective fertilization schemes for oilseed rape agriculture.

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Changes in the bacterial community structure in soil under conventional and conservation practices throughout a complete maize (Zea mays L.) crop cycle

Cited by 16 publications

References 72 publications

Bacterial Communities in the Rhizosphere at Different Growth Stages of Maize Cultivated in Soil Under Conventional and Conservation Agricultural Practices

Bacterial Communities in the Rhizosphere at Different Growth Stages of Maize Cultivated in Soil Under Conventional and Conservation Agricultural Practices

Cascading effects of composts and cover crops on soil chemistry, bacterial communities and the survival of foodborne pathogens

Synergistic effects of rhizosphere effect and combined organic and chemical fertilizers application on soil bacterial diversity and community structure in oilseed rape cultivation

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