Agregação do solo, carbono orgânico e emissão de CO2 em áreas sob diferentes usos no Cerrado, região do Triângulo Mineiro

Borges, Camila Silva; Ribeiro, Bruno Teixeira; Wendling, Beno; Cabral, Danilo Alves

doi:10.4136/ambi-agua.1573

Cited by 8 publications

(10 citation statements)

References 26 publications

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“…In both fragments studied, CMI values lower than the reference area were observed in the surrounding NTS areas (Table 5). These results demonstrate that the modification caused by the conversion of natural areas may compromise soil quality (Rosset et al, 2019b), mainly in surface layers, affecting the quality of SOM due to the low diversity of species in the soybean/corn succession over the years of cultivation, which directly influences the physical quality (Sales et al, 2018), chemistry (Souza et al, 2018) and the biological activity (Borges et al, 2016) of the soil over the years of cultivation.…”

Section: Resultsmentioning

confidence: 84%

“…Thus, physical granulometric fractionation of SOM, which quantifies labile and recalcitrant fractions, is an important environmental assessment tool (Rosset et al, 2019b). In addition to the forms of fractionation, the evaluation of soil mineralizable carbon is another variable that contributes to evaluate soil biological quality (Borges et al, 2016;Rosset et al, 2019a), through the emission of CO2, product of the activity of microorganisms that decompose SOM (Rosset et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

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Physical fractions of organic matter and mineralizable soil carbon in forest fragments of the Atlantic Forest

Ozório¹,

Rosset²,

Schiavo³

et al. 2020

Rev. ambiente água

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This study determined the physical granulometric fractionation evaluated the mineralizable carbon within and around forest fragments of the Atlantic Forest biome located in the state of Paraná. Soil samples were collected at three three internal points of the fragments: the edge (E), the half radius (HR) and the center (CF); and one point in no-tillage system (NTS) areas around the fragments, in four replicates. The contents of total organic carbon (TOC), particulate fraction carbon (C-POM) and mineral fraction (C-MOM) were determined, and the %POM and %MOM and the stocks of POM (StockPOM) and MOM (StockMOM) were calculated, in addition to the indices: carbon stock index (CSI), lability (L), lability index (LI) and carbon management index (CMI), also evaluating CO2 emission, daily and accumulated. The highest TOC levels were observed in the CF point. The highest C-POM contents were observed in the E and CF points of fragment 1, in the CF point of fragment 2, and the highest C-MOM contents were expressed in the CF points of both fragments. CMI showed a distinct pattern among the fragments. The NTS areas showed lower C-CO2 emissions, with 39.8% and 28.3% less total emission compared to CF. The results of physical granulometric fractionation show the CF point favors the quality of SOM and the mineralizable carbon analysis indicated that the conversion of native areas into NTS compromises soil microbial activity.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Physical fractions of organic matter and mineralizable soil carbon in forest fragments of the Atlantic Forest

Ozório¹,

Rosset²,

Schiavo³

et al. 2020

Rev. ambiente água

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“…High SOC content in the HU fraction are usually found in soils with application of organic soil fertilizers. Borges et al (2015) found that soils treated with PS and poultry litter had higher SOC in the HU fraction than those with mineral fertilizer or without fertilizer application. The compounds that constitute this fraction are more stable, they present higher resistance to biodegradation (Guerra et al, 2008).…”

Section: Resultsmentioning

confidence: 92%

“…The SOM was fractionated by determining the SOC content in the fractions fulvic acids (FA), humic acids (HA), and humin (HU), according to the methodology described by Benites et al (2003).…”

Section: Methodsmentioning

confidence: 99%

“…The distribution of the SOC content into these fractions is affected by the soil management (Novotny et al, 1999), and the soil organic carbon accumulation can increase by applying organic compounds to the soil (Lima, 2011). Soils with continuous additions of PS and/or poultry litter usually have high SOC in the HU fraction, which is more stable and has higher resistance to biodegradation (Borges et al, 2015). The E4/E6 ratio is an indicator of stability and maturity of HS or any organic compound (He et al, 2016) and shows the SOM humification degree, which is higher in soils fertilized with NPK and lower in those fertilized with organic residues (Mensik et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Accumulation of humic substances in an Oxisol fertilized with pig slurry for 15 years

Sacomori

Cassol

Mafra

et al. 2021

Rev. bras. eng. agríc. ambient.

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The growth of swine production in Brazil has increased the amount of production and use of pig slurry (PS) as soil fertilizer. This product provides nutrients to plants, and a continuous application of this residue usually increases total soil organic carbon (SOC) content. The objective of this study was to determine the SOC content and its distribution into humic substance fractions (humic acids, fulvic acids, and humin) in an Oxisol annually fertilized with PS for 15 years. The experiment was implemented in 2001 with a maize and oat crop rotation under no-tillage system in Campos Novos, SC, Brazil. The treatments used were: PS at rates of 0 (Control), 25, 50, 100, and 200 m3 ha-1 year-1, mineral fertilizer, and PS combined with mineral fertilizer, applied on the soil surface once a year. The 0-2.5, 2.5-5, 5-10, 10-20, 20-40, and 40-60 cm soil layers were evaluated for SOC content in the fractions humic acid, fulvic acid, and humin, and E4/E6 ratio of humic substances. Increases in PS rates up to 100 m3 ha-1 increased the SOC content in the 5-10 cm soil layer; however, decreased the proportion of the soil fulvic acid and humic acid fractions, favoring the accumulation of organic carbon in the humin fraction. The E4/E6 ratio was higher when using the soil mineral fertilizer than that found in treatments with PS.

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Emissão de gases de efeito estufa do solo em áreas de Blowdown na Amazônia Central

Simon

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A bibliometric study type "science mapping", on the topic of "wind disturbances" was carried out to find the impacts of these phenomena on soils. In general, the main results with the highest numbers of works found are for above-ground biomass, with few developing the topic soils within the context. In addition to deforestation, natural phenomena such as blowdowns become increasingly larger and more common in one of the most important biomes in the world, the Amazon. Thus, we aimed to understand how areas where natural disturbance blowdown occurred alter greenhouse gas fluxes (CO2, CH4, and N2O), soil physical attributes, and carbon and nitrogen stocks when compared to undisturbed forest areas in Central Amazon. The study was carried out in the Tropical Forestry Experiment Station/INPA, a characteristic Campinarana vegetation, with sandy textured Latosols. The areas evaluated were undisturbed forest (VNP) plus two areas where blowdown occurred in the years 2005 (BD15) and 2019 (BD1). Gas collections were performed in the rainy season with static cameras, with Gasmet equipment that uses FTIR. We also collected burlap and soil (deformed and undeformed samples) in layers 0-10,10-20, 20-30, and 30-50 cm, aiming to evaluate the quality and origin of organic matter by determining the isotopic composition and soil carbon stock. The mean total fluxes of the campaign for BD1, BD15 and VPN were 90.3±4.3, 75.6±4.5, 73.0±3.1 C-CO2 mg m -2 h -1 ; 50.2±9.4, 32.2±5.4 and 27.1 N-N2O µg m -2 h -1 , -33.0±4.3, -15.07±5.2 and -26.1±3.6 C-CH4 µg m -2 h -1 respectively. The C and N stocks considering the range 0-50 for BD1, BD15, and VNP were 58.56, 64.56, 4.1, 4.8, and 5.6 Mg ha -1 of N respectively. The study areas blowdown in the Amazon rainforest. Thus, we can observe the superiority of the NPV with several attributes, where the absence of forest fall maintains the balance within the soil profile keeping the relationships between microorganisms, root system, and the diversity of fauna and flora in development conditions.

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Agregação do solo, carbono orgânico e emissão de CO2 em áreas sob diferentes usos no Cerrado, região do Triângulo Mineiro

Cited by 8 publications

References 26 publications

Physical fractions of organic matter and mineralizable soil carbon in forest fragments of the Atlantic Forest

Physical fractions of organic matter and mineralizable soil carbon in forest fragments of the Atlantic Forest

Accumulation of humic substances in an Oxisol fertilized with pig slurry for 15 years

Emissão de gases de efeito estufa do solo em áreas de Blowdown na Amazônia Central

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