Soil Microbial Biomass as an Edge Effect Indicator in Semi-Deciduous Seasonal Forest Fragments

Santos, Mayana Oliveira Duarte; Barreto-Garcia, Patrícia Anjos Bittencourt; Gama-Rodrigues, Emanuela Forestieri

doi:10.1590/2179-8087.103717

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…Taking into account the edge effect on changing soil nutrient conditions, we considered the possibility that the changes in microbial diversity could have been influenced PLOS ONE by the changing soil conditions near the edge by neighboring vegetation. In several studies in edge effect, field edges have been associated with increased organic C content [8,45], however, in our samples, we did not find an increase in the total ASV abundance in our treatments that would likely be associated with this effect [27]. While we did observe an increase in organic C content over time, this could be influenced by the edge effect or the cycling of cover crop and broccoli growth.…”

Section: Unique Bacterial Typescontrasting

confidence: 78%

Characterizing changes in soil microbiome abundance and diversity due to different cover crop techniques

Wang

et al. 2020

PLoS ONE

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Soil-based microorganisms assume a direct and crucial role in the promotion of soil health, quality and fertility, all factors known to contribute heavily to the quality and yield of agricultural products. Cover cropping, used in both traditional and organic farming, is a particularly efficient and environmentally favorable tool for manipulating microbiome composition in agricultural soils and has had clear benefits for soil quality and crop output. Several longterm investigations have evaluated the influence of multi-mix (multiple species) cover crop treatments on soil health and microbial diversity. The present study investigated the shortterm effects of a seven species multi-mix cover crop treatment on soil nutrient content and microbial diversity, compared to a single-mix cover crop treatment and control. Analysis of 16S sequencing data of isolated soil DNA revealed that the single-mix cover crop treatment decreased overall microbial abundance and diversity, whereas the control and multi-mix treatments altered the overall microbial composition in similar fluctuating trends. Furthermore, we observed significant changes in specific bacteria belonging to the phyla Acidobacteria, Actinobacteria, Planctomycetes, Proteobacteria and Verrucombicrobia for all treatments, but only the single-mix significantly decreased in abundance of the selected bacteria over time. Our findings indicate that the control and multi-mix treatments are better at maintaining overall microbial composition and diversity compared to the single-mix. Further study is required to elucidate the specific difference between the treatment effect of the multi-mix treatment and the control, given that their microbial composition changes over time were similar but they diverge into two populations of unique bacterial types by the end of this short-term study.

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Section: Unique Bacterial Typescontrasting

confidence: 78%

Characterizing changes in soil microbiome abundance and diversity due to different cover crop techniques

Wang

et al. 2020

PLoS ONE

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“…Microbial activity was measured as microbial respiration using an adapted method similar to that described by Santos et al (2019). Due to the (air) dry nature of the soils, distilled water was added to the soils to achieve approximate field capacity of the soils, to stimulate microbial activity.…”

Section: Soil Analysesmentioning

confidence: 99%

An investigation of the effects of hydrochar application rate on soil amelioration and plant growth in three diverse soils

Jager

Giani

2021

Biochar

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The hydrothermal carbonization (HTC) of biogas digestate alters the raw materials inherent characteristics to produce a carbon (C)-rich hydrochar (HC), with an improved suitability for soil amelioration. Numerous studies report conflicting impacts of various HC application rates on soil properties and plant growth. In this study, the influence of HC application rate on soil improvement and plant growth aspects was investigated in three diverse soils (Chernozem, Podzol, and Gleysol). Pot trials were conducted in which all soils were amended with 5, 10, 20 and 30% (w/w) HC in quintuplicate, with two controls of pure soil (with and without plants, respectively) also included. Prior to potting, soil samples were collected from all HC-amended soils and controls and analyzed for soil pH, plant available nutrients (PO4-P and K), and microbial activity using standard laboratory and statistical methods. Immediately after potting, a 6-week seed germination experiment using Chinese cabbage was conducted to determine germination success, followed by a plant growth experiment of equal duration and plant species to determine biomass success. At the end of the study (after a total plant growth period of 12 weeks), each pot was sampled and comparatively analyzed for the same soil properties as at the beginning of the study. Soil pH shifted toward the pH of the HC (6.6) in all soils over the course of the study, but was most expressed in the 20% and 30% application rates, confirming the well-documented liming effect of HC. The addition of HC increased the PO4-P and K contents, particularly with 20% and 30% HC amendments. These results are proposedly due to the large labile C fraction of the HC, which is easily degradable by microorganisms. The rapid decomposition of this C fraction prompted the quick release of the HCs inherently high PO4-P and K content into the soil, and in turn, further stimulated microbial activity, until this fraction was essentially depleted. HC addition did not inhibit seed germination at any rate, presumably due to a lack of phytotoxic compounds in the HC from aging and microbial processes, and furthermore, showed no significant impact (positive or negative) on plant growth in any soil, despite improved soil conditions. In conclusion, although less pronounced, soil improvements were still achievable and maintainable at lower application rates (5% and 10%), whereas higher rates did not ensure greater benefits for plant growth. While the addition of high rates of HC did not detrimentally effect soil quality or plant growth, it could lead to leaching if the nutrient supply exceeds plant requirements and the soil’s nutrient retention capacity. Therefore, this study validates the previous study in the effectiveness of the biogas digestate HC for soil amelioration and suggests that smaller regularly repeated HC applications may be recommendable for soil improvement.

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“…A RM consiste na liberação de C-CO 2 pelos microrganismos, nos seus processos metabólicos, CBM refere-se à imobilização temporária do elemento na biomassa viva do microrganismo). O q CO 2 informa quanto de C é perdido por meio do efluxo de CO 2 para incorporar uma unidade de C na biomassa microbiana e q MIC representa a relação entre o CBM/COT utilizada como indicador da qualidade da matéria orgânica do solo, demonstrando a eficiência dos microrganismos na utilização dos compostos orgânicos (Araújo Neto et al, 2014;Dadalto et al, 2015;Braga et al, 2016;Santos et al, 2019;Souza, 2021;Mason-Jones et al, 2021;Silva et al, 2021b;Yang et al, 2023).…”

Section: Introductionunclassified

Uso E Ocupação Do Solo Pela Silvicultura Do Eucalipto Na Amazônia Maranhense: Avanços Sobre O Município De Açailândia, Maranhão, Brasil

Oliveira,

Salles,

Paz

et al. 2023

Ciências Ambientais No Ecótono Amazônia-Cerrado Maranhense

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Editora Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena Editora Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterála de nenhuma forma ou utilizá-la para fins comerciais.Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético. Conselho Editorial Ciências Agrárias e Multidisciplinar

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Soil Microbial Biomass as an Edge Effect Indicator in Semi-Deciduous Seasonal Forest Fragments

Cited by 8 publications

References 16 publications

Characterizing changes in soil microbiome abundance and diversity due to different cover crop techniques

Characterizing changes in soil microbiome abundance and diversity due to different cover crop techniques

An investigation of the effects of hydrochar application rate on soil amelioration and plant growth in three diverse soils

Uso E Ocupação Do Solo Pela Silvicultura Do Eucalipto Na Amazônia Maranhense: Avanços Sobre O Município De Açailândia, Maranhão, Brasil

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