Characterization of Biogenic, Intermediate and Physicogenic Soil Aggregates of Areas in the Brazilian Atlantic Forest

Fernandes, Júlio César Feitosa; Pereira, Marcos Gervásio; Neto, Eduardo Carvalho da Silva; Neto, Thais de Andrade Corrêa

doi:10.1590/1983-21252017v30n107rc

Cited by 14 publications

(23 citation statements)

References 18 publications

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“…In the relative proportion of the different pathways of aggregate formation (Table 1), other authors have found similar results for physicogenic aggregation (Loss et al, 2014;Silva Neto et al, 2016;Fernandes et al, 2017). When evaluating the proportion of aggregate formation by the different pathways in NT areas with different times of implementation and forest in two seasons in Guaíra-PR, Ferreira et al (2020) observed that the proportion of physicogenic aggregates was higher than that of intermediate and biogenic aggregates after 23 years of NT in both seasons, with the opposite pattern for the forest area.…”

Section: Proportion Of Physicogenic and Biogenic Aggregatessupporting

confidence: 66%

Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Pinto

Ziviani

Morais

et al. 2021

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The aim of this study was to evaluate i) the different cover crops contribution used in no-tillage system (NT) to biogenic aggregation; and ii) the influence of aggregate formation pathways on the compartmentalization and the soil organic carbon origin. Two areas managed under NT with different implementation times (6 and 18 years, NT06 and NT18, respectively) and cover crops were evaluated, totaling six sampling areas: NT06, millet (NT06MI); NT06, brachiaria (NT06BR); NT06, sunn hemp (NT06SH); NT18, millet (NT18MI); NT18, brachiaria (NT18BR); NT18, and sunn hemp (NT18SH). In each sampling area, five pseudo-replicates were collected in the 0.00-0.05 and 0.05-0.10 m layers. The samples were air-dried and sieved using sieves with 9.7 and 8.0 mm mesh, and the aggregates retained within this interval were selected. The percentage of each type of aggregate (physicogenic and biogenic) was quantified. Total organic carbon (TOC) and the natural abundance of δ13C (‰) were analyzed and the physical fractionations of SOM were performed: particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) and density fractionation (free light fraction carbon, FLFC). Physicogenic aggregates were quantified in greater proportion, except for the areas of NT06BR and NT18BR in the 0.00-0.05 m layer. The biogenic aggregates showed the highest contents of TOC, POC, MAOC, FLFC and more negative values of δ13C. The use of grasses, especially Brachiaria spp., as cover plants in NT after 6 and 18 years of adoption favors the formation of aggregates through the biogenic pathway and they influence the compartmentalization and origin of stored organic carbon.

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Section: Proportion Of Physicogenic and Biogenic Aggregatessupporting

confidence: 66%

Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Pinto

Ziviani

Morais

et al. 2021

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“…Assim como Loss et al (2014) encontraram maiores teores de nutrientes em agregados biogênicos em áreas de SPD, pastagem e floresta secundária no Paraná, Brasil, sendo nos agregados biogênicos também observado expressiva presença de coprólitos de minhocas na camada superficial do solo (0-5 cm). Outros trabalhos também constataram maiores teores de COT e nutrientes em agregados de origem biogênica em relação aos agregados de origem fisiogênica (Fernandes et al, 2017).…”

Section: /8unclassified

“…Os fisiogênicos são aqueles que apresentam formas angulares ou prismáticas e estão relacionados à aproximação das partículas unitárias do solo relativas aos ciclos de umedecimento e secagem e pela ação de agentes cimentantes do solo (matéria orgânica e, ou, óxidos e hidróxidos de ferro e alumínio), e os biogênicos apresentam formas arredondadas e estão relacionados às vias biológicas de formação, tais como a passagem pelo trato intestinal da macrofauna do solo, especialmente minhocas, e também a ação cimentante de exsudatos das raízes e da biota associada (Velasquez et al, 2012;Batista et al, 2013;Loss et al, 2014). Os agregados biogênicos, em função de serem excretas da macrofauna do solo que se alimenta basicamente de matéria orgânica, apresentam maiores teores de nutrientes, contribuem na proteção física da matéria orgânica (sequestro de carbono), e normalmente possuem maior estabilidade física em água (Silva Neto et al, 2010), o que pode alocá-los como potenciais indicadores de qualidade do solo, uma vez que são sensíveis aos diferentes sistemas de uso e manejo do solo (Loss et al, 2014;Fernandes et al, 2017).…”

Section: Introductionunclassified

Atributos químicos em agregados biogênicos e fisiogênicos de solo submetido à aplicação com dejetos suínos

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AGRONOMIA (AGRONOMY) RESUMO: Aplicações sucessivas de dejetos suínos no solo podem promover aumento dos teores dos atributos químicos do solo, com ênfase naqueles presentes nos agregados biogênicos. Objetivou-se quantificar os teores de carbono orgânico total (COT), nitrogênio total (NT), pH, Al, Ca, Mg, P e K, nos agregados biogênicos e fisiogênicos do solo sob áreas com aplicação de dejetos líquidos de suínos (DLS) e cama sobreposta de suínos (CSS). Após 10 anos do uso de dejetos suínos em sistema plantio direto com a sucessão aveia preta/milho, coletaram-se amostras indeformadas de solo nas camadas de 0-5 e 5-10 cm, nos tratamentos sem dejetos (testemunha), com aplicação de DLS e CSS em doses equivalentes a uma e duas vezes a recomendação de N para o milho e aveia (DLS1X, DLS2X, CSS1X e CSS2X, respectivamente). Os agregados foram separados conforme a via de formação em biogênicos e fisiogênicos, sendo posteriormente feitas as análises químicas. A aplicação de CSS aumentou os teores de COT e NT em relação à testemunha e as áreas com DLS, que não se diferenciaram entre si. O uso de DLS aumentou os teores Ca (0-10 cm), K (DLS1X para 0-10 cm) e P (5-10 cm), e não alterou os teores de Mg e NT, em relação à testemunha; enquanto o uso de CSS aumentou o Mg (0-5 cm), Ca, N, P e K (0-10 cm) quando comparado aos DLS e à testemunha. Os agregados biogênicos favorecem o aumento de N, P, K, Mg e COT em relação aos fisiogênicos. Palavras-chave: cama sobreposta de suínos; dejetos líquidos de suínos; fertilidade do solo; gênese dos agregados; sistema plantio direto Chemical attributes in biogenic and physicogenic aggregates of soil submitted to swine manure application ABSTRACT: Successive applications of swine manure in soil can promote increases of contents of soil chemical attributes, with emphasis on those present in the biogenic aggregates. The objective of this study was to quantify total organic carbon (TOC), total nitrogen (TN), pH, Al, Ca, Mg, P and K, in the biogenic and physicogenic aggregates of the soil under areas with pig slurry (PS)) and deep litter (DL). After 10 years of use of swine manure in no-tillage system with black oat/maize succession, undisturbed soil samples were collected in the 0-5 and 5-10 cm layers, in the treatments without wastes (control), with application of PS and DL in doses equivalent to one and two times the recommended N for corn and oats (PS1X, PS2X, DL1X and DL2X, respectively). The aggregates were separated according to the biogenic and physicogenic formation pathway, and the chemical analyzes were performed. The application of DL increased the TOC and TN contents in relation to the control and the areas with PS, which did not differentiate between them. The use of PS increased the Ca (0-10 cm), K (PS1X to 0-10 cm) and P (5-10 cm) contents, and did not alter the Mg and TN contents, relative to the control; while the use of DL increased the Mg (0-5 cm), Ca, N, P and K (0-10 cm) when compared to the PS and the control. The biogenic aggregates favor the increase of N, P, K, Mg and TOC in...

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“…The distinction between types of aggregates is made according to their genesis or formation pathways based on morphological characteristics, such as shape, size, presence of roots, and porosity (Bullock et al, 1985;Pulleman et al, 2005;Batista et al, 2013a;Melo et al, 2019). Aggregates also differ in the levels of SOM, especially those formed by macrofauna and plant root activities (Loss et al, 2014;Rossi et al, 2016;Silva Neto et al, 2016;Fernandes et al, 2017;Loss et al, 2017;Pinto et al, 2018;Ventura et al, 2018;Mergen Junior et al, 2019a,b;Melo et al, 2019;Schultz et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Physicogenic and biogenic aggregates under different management systems in the Cerrado region, Brazil

Pinto

Torres

Morais

et al. 2021

Revista Brasileira De Ciência Do Solo

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An important strategy for the sustainable management of Cerrado soils is no-till (NT) systems, which may improve soil properties, particularly aggregation. Soil aggregates can be categorized according to their formation pathways into physicogenic (Phy) and biogenic (Bio). This study aimed (i) to quantify the relative proportion of physicogenic and biogenic aggregates and (ii) evaluate the levels of total organic carbon and their respective humic and physical fractions in the aggregates' formation pathways. The following managed and unmanaged sites were evaluated: a 6-year no-till site (6NT), an 18-year no-till site (18NT), a conventional tillage site (CT), and a reference Cerrado site (RS). Retained aggregates were analyzed morphologically, separated into Phy and Bio, and quantified. Subsequently, aggregates were subjected to total organic carbon (TOC) determination, fulvic acid carbon, humic acid carbon, humin carbon, particulate organic carbon (POC), mineral-associated organic carbon, and free light fraction carbon (FLFC). The proportion of Bio aggregates increased with decreasing management intensity. When TOC and humic acid carbon levels were compared between sites, it was found that Bio aggregates from 18NT and 6NT contained higher carbon content than Bio aggregates from CT. Particulate organic carbon and FLFC differed between aggregate types, with higher POC values observed in Bio aggregates from CT and 18NT and higher FLFC values in Bio aggregates from CT, 6NT, and 18NT. The practices adopted in the conservation management system favored biogenic aggregation in the Cerrado region, which can be proven through the study of the fractions of soil organic matter contained in these aggregates. The biogenic aggregation changed the SOM dynamics. Principal component analysis showed a clear distinction between conventional and conservationist management systems.

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Characterization of Biogenic, Intermediate and Physicogenic Soil Aggregates of Areas in the Brazilian Atlantic Forest

Cited by 14 publications

References 18 publications

Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Atributos químicos em agregados biogênicos e fisiogênicos de solo submetido à aplicação com dejetos suínos

Physicogenic and biogenic aggregates under different management systems in the Cerrado region, Brazil

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