Granulometric and oxidizable carbon fractions of soil organic matter in crop-livestock integration systems

Bieluczyk, Wanderlei; Pereira, Marcos Gervásio; Guareschi, Roni Fernandes; Bonetti, João de Andrade; Freó, Vanessa Aparecida; Neto, Eduardo Carvalho da Silva

doi:10.5433/1679-0359.2017v38n2p607

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…The changes in some of these attributes may be related to crop residues, that is, from maize (straw) and pasture (forage mass), and residues from the excreta of grazing animals. Studies have reported the effect of these residues on soil (Bieluczyk et al, 2017; Carvalho et al, 2009; Deiss et al, 2016; Garcia et al, 2008; Silva et al, 2014; Zhou et al, 2020) but few of them have investigated the importance of sowing techniques for the implementation of ICLS in an Oxisol.…”

Section: Discussionmentioning

confidence: 99%

“…According to Loss et al (2012), ICLS tend to improve the SOC content of soil due to the combination of several factors such as dry mass, grass roots and shoots, plant residues from annual crops, and fertilization. In a three‐year experiment of an Oxisol, Bieluczyk et al (2017) found that ICLS increased SOM content in the topsoil layer, which is related to the increase in SOC, regardless of pasture height management.…”

Section: Discussionmentioning

confidence: 99%

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Integrated crop‐livestock versus conventional systems: Effects on the chemical and physical characteristics of an Oxisol

Augusto,

de Paz,

Mendonça

et al. 2024

Grass and Forage Science

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Studies have reported improvements in soil quality in integrated crop‐livestock systems (ICLS) when compared to conventional systems. The hypothesis of this study was that ICLS improve Oxisol quality due to the use of intercropping, adding pasture and cattle to the systems. The aim of the study was to evaluate the chemical and physical characteristics of an Oxisol and pasture production in the integrated system versus conventional system. We compared two conventional systems: crop system (maize grain production) and livestock system (beef cattle on single pasture) and, four ICLS: maize plus Marandu palisade grass sown simultaneously without herbicide (ICLS‐1); maize plus Marandu palisade grass sown simultaneously with herbicide (ICLS‐2); maize plus Marandu palisade grass in lagged sowing (ICLS‐3); and maize plus Marandu palisade grass sown simultaneously in maize rows and inter‐rows with herbicide (ICLS‐4). A randomized block design with six treatments and three replicates was used. The results suggest improvements in soil quality, including soil organic carbon (ICLS‐4), total nitrogen, and nitrogen stocks (ICLS‐1, ICLS‐2, and ICLS‐4). The intercropping technique influenced pasture production and soil quality during the implementation of integrated systems. The lowest soil strength was obtained for the crop system compared to systems with grazing animals but there were no changes in the soil physical characteristics that could compromise the production system.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Integrated crop‐livestock versus conventional systems: Effects on the chemical and physical characteristics of an Oxisol

Augusto,

de Paz,

Mendonça

et al. 2024

Grass and Forage Science

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Aggregation and dynamics of soil organic matter under different management systems in the Brazilian Cerrado

et al. 2021

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The objectives of this study were to evaluate the stability of aggregates, and quantify the contents and stocks of total organic carbon (TOC), and granulometric and humic fractions of soil organic matter (SOM). Four management systems were evaluated: (1) a no-tillage system (NTS) implemented 5 years ago (NTS5); (2) NTS implemented 17 years ago (NTS17); (3) conventional tillage system (CTS) implemented 20 years ago (CTS20); and (4) native Cerrado vegetation. For each system, five undeformed and five deformed soil samples were collected from the 0.00–0.05, 0.05–0.10, 0.10–0.20, and 0.20–0.40 m layers. The weighted mean diameter (WMD), TOC, stock of carbon (StockC), organic carbon particulate (OCp), organic carbon associated with minerals (OCam), stock of OCp, stock of OCam, carbon stock index, carbon management index (CMI), organic carbon in the fulvic acid fraction (FAF), humic acid fraction (HAF), and humin fraction were quantified. The WMD and CMI values increased as the soil management intensity decreased. The adoption of the NTS increased the WMD and the contents, stocks, and proportions of TOC in the more labile granulometric and humic (FAF/HAF) fractions of the SOM. The WMD, CMI, granulometric and chemical fractionation of the SOM were more efficient than the TOC and StockC in identifying the differences between the management systems. Due to the higher contents of the more labile fractions of SOM, the granulometric and chemical fractionation of SOM in the NTS5 and NTS17 systems had higher values of WMD and CMI than the CTS20 system.

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The Use of Integrated Crop–Livestock Systems as a Strategy to Improve Soil Organic Matter in the Brazilian Cerrado

Soares,

Souza,

Homem

et al. 2024

Agronomy

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This study aimed to analyze the carbon (C) stock and stabilization of soil organic matter in particulate- and mineral-associated fractions across different land use systems after 32 years of experimentation in the Brazilian Cerrado. The experiment was established in 1991 and was performed in Planaltina-DF. The treatments evaluated included continuous pasture with monoculture grasses; integrated crop–livestock systems under no tillage; continuous cropping under no tillage; minimum tillage; and the preservation of the native Cerrado biome in its original condition. Soil sampling was performed to a depth of 30 cm. Carbon and nitrogen (N) stocks were quantified for the years 2001, 2009, 2013, and 2023, with soil organic matter fractionation performed on samples from 2023. Land use change resulted in significant losses of soil C and N in areas managed with conventional soil preparation practices. Systems that promote plant diversity, such as integrated crop–livestock systems, enhanced soil C and N stocks (72.8 and 5.5 Mg ha−1, respectively) and increased both particulate organic matter and mineral-associated fractions, most of which were in more stabilized forms. Integrated crop–livestock systems are management practices that offer an effective alternative to present methods in terms of combating climate change and supporting ecosystem sustainability.

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Granulometric and oxidizable carbon fractions of soil organic matter in crop-livestock integration systems

Cited by 3 publications

References 19 publications

Integrated crop‐livestock versus conventional systems: Effects on the chemical and physical characteristics of an Oxisol

Integrated crop‐livestock versus conventional systems: Effects on the chemical and physical characteristics of an Oxisol

Aggregation and dynamics of soil organic matter under different management systems in the Brazilian Cerrado

The Use of Integrated Crop–Livestock Systems as a Strategy to Improve Soil Organic Matter in the Brazilian Cerrado

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