Frações granulométricas da matéria orgânica do solo em consórcio de milho safrinha com capim-marandu sob fontes de nitrogênio

Faccin, Fabiane Cargnin; Marchetti, Marlene Estevão; Serra, Ademar Pereira; Ensinas, Simone Cândido

doi:10.1590/s0100-204x2016001200011

Cited by 14 publications

(14 citation statements)

References 30 publications

(22 reference statements)

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“…Higher OCAM levels (17.85 and 16.02 kg kg -1 ) were found in the Forest area because if there is a high OCAM participation in the organic C, it means that in the area there is a great stabilization of the C and probably a decrease of CO 2 emission (BATISTA et al, 2013). In addition, higher carbon contents in the most recalcitrant fractions in Oxisols can be explained by the association of organic matter with the clays, forming organomineral complexes (FACCIN et al, 2016). However, OCAM is not always a good indicator of the effect of management on soil properties, since changes in soil properties may take many years to be detected (CARMO et al, 2012).…”

Section: Resultsmentioning

confidence: 94%

“…Significant changes were observed for OCAM contents, with the levels that tend to increase in depth and different behavior of the POC. The higher OCAM levels in depth may be associated with the greater stability of subsurface aggregates, which contributes to greater stabilization of SOM (FACCIN et al, 2016) (Table 1). Higher OCAM levels (17.85 and 16.02 kg kg -1 ) were found in the Forest area because if there is a high OCAM participation in the organic C, it means that in the area there is a great stabilization of the C and probably a decrease of CO 2 emission (BATISTA et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…J., Uberlândia, v. 36, n. 3, p. 743-760, May/June 2020 http://dx.doi.org/10.14393/BJ-v36n3a2020-47702 physical fractionation (CAMBARDELLA; ELLIOTT, 1992), the oxidation fractionation (CHAN;BOWMAN;OATES, 2001), the chemical fractionation (SWIFT, 1996;MADARI;MACHADO, 2003), and the carbon management index (CMI) (BLAIR;LEFROY;LISLE, 1995). Among these, the form used as an indicator of soil quality, more sensitive to changes in management, is the physical granulometric fractionation of soil in Particulate Organic Carbon (POC) and Organic Carbon Associated with Minerals (OCAM) (BALIN et al, 2017;FACCIN et al, 2016), because they are based on the degree of association of SOM with the soil matrix (GAZOLLA et al, 2015). Carbon is called POC when it is free or weakly associated with soil particles, or OCAM, when C is strongly bound to the mineral particles, forming organicmineral complexes (GAZOLLA et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Soil organic matter fractions and carbon management index under integrated crop-livestock system

et al. 2020

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The objective of this work was to evaluate the carbon content of the physical, chemical and oxidizable fractions of soil organic matter (SOM) and to calculate the carbon management index (CMI) in an area managed under an integrated crop-livestock system (ICLS) in the western region of Paraná - Brazil. The experiment was carried out at the experimental farm, belonging to the Universidade Estadual do Oeste do Paraná. Seventeen areas, which are managed in different ways, fifteen in ICLS and two areas of controls (Forest and Haymaking), using the design divided with two nested controls, with three replications were evaluated. Deformed and undisturbed soil samples were collected from all the areas to determine the total organic carbon (TOC), carbon stock, the physical, chemical and oxidizable fractions of SOM and the CMI in the layers of 0-0.05, 0.05-0.1 and 0.1-0.2 m. Little significant changes in the fractions were found for the management of the ICLS area in relation to the Forest and the area of Haymaking, although the Forest presented the best values for most of the studied fractions. It is recommended to adopt sustainable practices, such as ICLS, even though the average fractions tend to take time to match reference areas.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soil organic matter fractions and carbon management index under integrated crop-livestock system

et al. 2020

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“…The lowest levels of C-MOM were observed in the 0.10-0.20 m layer, in the NTS area around Fragment 1, and in point E and NTS area of Fragment 2 (Table 4). The fact that only soybean/corn succession has been cultivated for several years in the areas of NTS, also influences on the lower carbon content of this fraction, because the greater diversity of plant residues left in systems with greater crop diversity considerably increases the entry of SOM in the most labile fraction of carbon and, consequently, over time, of the more recalcitrant fractions of C (Faccin et al, 2017), when compared to systems with less diversity (Boddey et al, 2010;Campos et al, 2011).…”

Section: Resultsmentioning

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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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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“…Nevertheless, ammonium sulfate acidifies the soil due to the nitrification process. Among urea, ammonium sulfate, and potassium nitrate fertilizers applied in forage grasses, ammonium sulfate has the highest capacity to increase soil acidity [23].…”

Section: New Perspectives In Forage Cropsmentioning

confidence: 99%

Best Management Practices (BMPs) for Nitrogen Fertilizer in Forage Grasses

Serra¹,

Marchetti²,

Dupas³

et al. 2018

New Perspectives in Forage Crops

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There is a concern about the growing population and limitation in natural resources which are taking the population to direct its agricultural systems into a more productive and efficient activity, looking to avoid a negative impact on the surrounding environment. The industry energy expended to produce nitrogen (N)-fertilizer is considered an indirect consumption of energy in agriculture, which is higher with an increasing forage yield. Nitrogen is the key nutrient associated with high-yielding production in forage grass and grain crops. The aim of this chapter is to introduce the best management practices (BMPs) for N-fertilizer application in forage grasses to improve N-use efficiency, since the most economical way to feed livestock is forage plants where its potential biomass production is not well explored. The BMPs basically follow three management practices: (1) soil nutrient availability and forage requirement, (2) fertilizer application, and (3) decrease in nutrient losses from soil. In order to take a decision on applying N-fertilizer to accomplish forage grasses production with social, economic, and environmental benefits, the N-fertilizer use in forage grasses is going to follow the "Right rate, Right source, Right place, and Right time (4R) nutrient stewardship." The application of the 4R's nutrients stewardship is directly associated with economic, social, and environmental impact. The capacity of the 4R's implementation worldwide turns into a best guide to improve the striving of better N-use efficiency in forage grass. The 4R's are interrelated; thus, the recommendation of N-fertilizer rates cannot be prescribed without the combination of the 4R's where a whole system to be followed should be considered to decide about N-fertilizer in pasture. Consequently, any decision in one of the 4R's is going to affect the expected N-fertilizer results and dry matter production.

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Frações granulométricas da matéria orgânica do solo em consórcio de milho safrinha com capim-marandu sob fontes de nitrogênio

Cited by 14 publications

References 30 publications

Soil organic matter fractions and carbon management index under integrated crop-livestock system

Soil organic matter fractions and carbon management index under integrated crop-livestock system

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

Best Management Practices (BMPs) for Nitrogen Fertilizer in Forage Grasses

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