Evolution and accumulation of C-CO2 in biogenic and physiogenic aggregates of different agroecological management systems

Pinto, Luiz Alberto Silva Rodrigues; Moura, Octávio Vioratti Telles de; Rossi, Celeste Queiroz; Pereira, Marcos Gervásio; Barros, Fabiana da Costa

doi:10.15446/acag.v67n4.67923

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…The authors also highlighted the advantages of the management practices adopted in organic agriculture, since it allows less demand for external inputs. In the second study, in these same management systems, it was evidenced by Pinto et al 8 that no-tillage showed higher C-CO2 emission values in biogenic aggregates in relation to the other areas, the authors attributed this result to the lower C / N ratio of the crops (corn and eggplant) implanted in this area, by organic fertilization (cattle manure and chicken litter), and at the lowest temp.…”

Section: Effect Of Management Practices On Soil Propertiesmentioning

confidence: 72%

“…Still in these previous areas, Moura et al 7 Pinto et al 8 evaluated, respectively, the fractions of phosphors in biogenic and physiogenic aggregates, and the quantification of C-CO2. The results for all areas of organic production showed adequate levels of phosphorus, allowing self-sufficiency in relation to phosphate nutrition.…”

Section: Effect Of Management Practices On Soil Propertiesmentioning

confidence: 99%

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A mini review on changes in soil attributes by management practices in organic vegetable production in southeast Brazil

Silva¹,

Silva²,

Araújo³

et al. 2021

HIJ

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The offer of healthier foods, the search for agricultural and economic sustainability and the appreciation of the role of farmers are the notorious foundations of organic agriculture in society. These principles are reflected in the insertion of specific agricultural practices adopted in the soil, which are based on the maintenance of soil fertility and long-term biological activity. Therefore, management practices that favor and contemplate these principles are of great interest to researchers and organic farmers. From this, the objective of this review was to understand the main effects of different management practices on organic vegetable production. Preliminary studies show that there is a great incentive for the establishment of this management system in organic production.

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Section: Effect Of Management Practices On Soil Propertiesmentioning

confidence: 72%

Section: Effect Of Management Practices On Soil Propertiesmentioning

confidence: 99%

A mini review on changes in soil attributes by management practices in organic vegetable production in southeast Brazil

Silva¹,

Silva²,

Araújo³

et al. 2021

HIJ

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“…Such results may be related to the role of aggregates in carbon sequestration. Biogenic aggregates store more labile forms of carbon, whereas physicogenic aggregates store more recalcitrant forms (Pinto et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…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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“…CO 2 -C emission occurs until the substrate ends, after which the microorganisms die and CO 2 -C values decrease. Dead microfauna then become a source of energy for resistant microorganisms, which multiply and generate new peaks of CO 2 -C emission(Carvalho et al 2008;Pinto et al 2018). Such a pattern explains the peaks in CO 2 -C observed between days 7 and 13 of incubation, as also reported byLoss et al (2013; andRosset et al (2019).…”

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confidence: 99%

Soil Quality Indicators in Conventional and Conservation Tillage Systems in the Brazilian Cerrado

Pinto

Lima

Silva

et al. 2021

Preprint

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Conventional and conservation tillage systems can alter soil aggregation and total and labile soil organic matter (SOM) contents. This study aimed to determine the degree of soil aggregation, quantify total carbon (TC), permanganate oxidizable carbon (POXC), light organic matter (LOM), and potentially mineralizable carbon (CO2-C) contents in soils aggregates, and assess soil quality indices at sites under conventional and conservation tillage in the Cerrado region of Minas Gerais State, Brazil. Four experimental areas were analyzed: a area under conventional tillage for 20 years, a area under no-till for 6 years, a area under no-till for 18 years, and a reference area of undisturbed Cerrado vegetation. Soil aggregates retained on 8.0 to 4.0 mm sieves were evaluated for size class distribution and mean weight diameter. TC, POXC, LOM, daily and total CO2-C emissions were also analyzed. These data were used to calculate the C/N ratio and sensitivity, carbon pool, and lability indices. The results of SOM compartments were in agreement with those obtained for the soil aggregation status. Environmental conditions at no-till areas promoted macroaggregate formation and preserved TC and LOM contents, resulting in a high degree of aggregate stability. Soil quality indices were sensitive to identify changes between the reference area and managed areas. Soil aggregates from no-till areas had higher CO2-C emissions and accumulations than those from the conventional tillage area.

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Evolution and accumulation of C-CO2 in biogenic and physiogenic aggregates of different agroecological management systems

Cited by 7 publications

References 5 publications

A mini review on changes in soil attributes by management practices in organic vegetable production in southeast Brazil

A mini review on changes in soil attributes by management practices in organic vegetable production in southeast Brazil

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

Soil Quality Indicators in Conventional and Conservation Tillage Systems in the Brazilian Cerrado

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