ORCID Profile
0000-0003-2015-048X
Current Organisations
Ponta Grossa State University
,
Universidade Estadual de Ponta Grossa
,
Centro de Ensino Superior dos Campos Gerais
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Publications
Macroaggregation and soil organic carbon restoration in a highly weathered Brazilian Oxisol after two decades under no-till
Publisher: Elsevier BV
Date: 04-2018
DOI: 10.1016/J.SCITOTENV.2017.10.072
Abstract: Conclusions based on studies of the impacts of soil organic carbon (SOC) fractions and soil texture on macroaggregation and SOC stabilization in long-term (>20years) no-till (NT) fields remain debatable. This study was based on the hypothesis that the amount and frequency of biomass-C input associated with NT can be a pathway to formation of macroaggregates and to SOC buildup. The objectives were to: 1) assess the macroaggregate distribution (proportional mass, class mass) and the SOC and particulate organic carbon (POC) stocks of extra-large (8-19mm), large (2-8mm) and small (0.25-2mm) macroaggregate size classes managed for two decades by NT, and 2) assess the recovery of SOC stocks in extra-large macroaggregates compared to adjacent native vegetation (Andropogon sp., Aristida sp., Paspalum sp., and Panicum sp.). The crop rotation systems were: soybean (Glycine max L.), maize (Zea mays L.) and beans (Phaseolus vulgaris L.) in summer and black oat (Avena strigosa Schreb), white oat (Avena sativa), vetch (Vicia sativa L.), black oat.+vetch (Avena strigosa Schreb+vetch) and wheat (Triticum aestivum L.) in winter. The experimental was laid out as 2×2 randomized block factorial with 12 replicates of a NT experiment established in 1997 on two highly weathered Oxisols. The factors comprised of: (a) two soil textural types: clay loam and sandy clay, and (b) two s ling depths: 0-5 and 5-20cm. The three classes of macroaggregates were obtained by wet sieving, and the SOC content was determined by the dry combustion method. The extra-large macroaggregate classes in 0-20cm depth for sandy clay (SdC) and clay loam (CL) Oxisol represented 75.2 and 72.4% of proportional mass, respectively. The SOC and POC stocks among macroaggregate classes in 0-5 and 5-20cm depths decreased in the order: 8-19mm>2-8mm ≈ 0.25-2mm. The SdC plots under soybean/maize at 3:1 ratio recovered 58.3%, while those at 1:1 ratio (high maize frequency) in CL recovered 73.1% of SOC stock in the extra-large macroaggregates compared with the same under native vegetation for 0-20cm depth. Thus, partial restoration of the SOC stock in original extra-large macroaggregate confirms the hypothesis that NT through higher maize cultivation frequency can be a pathway to fomation of macroaggregates and SOC buildup.
C-offset and crop energy efficiency increase due industrial poultry waste use in long-term no-till soil minimizing environmental pollution
Publisher: Elsevier BV
Date: 04-2021
Driving factors of soil carbon accumulation in Oxisols in long-term no-till systems of South Brazil
Publisher: Elsevier BV
Date: 05-2018
DOI: 10.1016/J.SCITOTENV.2017.12.019
Abstract: In a climate change scenario, it is important to understand the factors that lead to changes in a soil carbon (C) sink. It is recognized that such process is highly dependent on climate, soil properties, topography, and vegetation. However, few studies demonstrate how these mechanisms operate in highly weathered Oxisols. Therefore, this study evaluated the driving factors for C recovery and accumulation and its relations with fertility attributes in the soil profile (0 to 1m depth) in no-till (NT) croplands of south Brazil. The adoption of NT in the studied fields started between 1978 (pioneer areas) and 1990 and represent a range of textural and mineralogical characteristics South Brazil main croplands. Soil s les were collected in paired fields of native vegetation and NT (NV vs. long-term NT) to a depth of 1m. The studied NT areas of Rio Grande do Sul State were managed according to the principles of conservation agriculture (minimum soil disturbance, permanent soil cover and erse crop rotation). The processes that drove SOC recovery in the studied sites were soil fertility management allied with high C input through intense crop rotation. The C recovery was were for areas with the predominance of soybean in the cropping system, higher levels of Al
Enzymes and C pools as indicators of C build up in short-term conservation agriculture in a savanna ecosystem in Cambodia
Publisher: Elsevier BV
Date: 04-2018
Soil carbon inventory to quantify the impact of land use change to mitigate greenhouse gas emissions and ecosystem services
Publisher: Elsevier BV
Date: 12-2018
DOI: 10.1016/J.ENVPOL.2018.07.068
Abstract: Currently the land use and land use change (LULUC) emits 1.3 ± 0.5 Pg carbon (C) year
Conservation agriculture based on diversified and high-performance production system leads to soil carbon sequestration in subtropical environments
Publisher: Elsevier BV
Date: 05-2019
How does no-till deliver carbon stabilization and saturation in highly weathered soils?
Publisher: Elsevier BV
Date: 04-2018
Soil carbon fractions and biological activity based indices can be used to study the impact of land management and ecological successions
Publisher: Elsevier BV
Date: 2018
Related Organisations
Related Funding Activities
No related grants have been discovered for Daniel Gonçalves.