Soil organic carbon sequestration under Araucaria angustifolia plantations but not under exotic tree species on a mountain range
19/Jun/2024
ABSTRACT Plantation forests can be efficient C sinks in biomass and soil organic carbon (SOC), but the latter depends on many factors, including climate. Tropical humid, mountain areas have cooler temperatures, slowing microbial decomposition, and thus can store considerable SOC. However, the effects of forest plantations on SOC of these montane areas are still poorly studied. Here, we aimed to assess changes in SOC, and related soil properties, after conversion of native rainforest to plantations of five tree species, with […]
Changes in physical and hydraulic properties in sandy soils of the Pampa Biome under different uses
03/Oct/2023
ABSTRACT The naturally fragile sandy soils of the Pampa Biome (PB) may be degraded with the introduction of poorly managed agricultural crops. Anthropic use can markedly decrease vegetation cover on sandy soils, leaving them more exposed to erosive agents. Decreases in organic matter content, biodiversity, and nutrient availability, increased soil compaction, and decreased water availability are also some of the impacts caused on PB soils by implementing poorly managed agricultural crops. In Rio Grande do Sul, in areas with sandier […]
Agrosilvopastoral system as a potential model for increasing soil carbon stocks: a century model approach
04/Jul/2023
ABSTRACT Agrosilvopastoral systems have been used as sustainable production models that can promote soil organic carbon (SOC) storage. However, there are no simulation studies with the Century model to estimate the SOC accumulation capacity in the long term, analyzing the effects of management and climate change in integrated crop-livestock-forest (ICLF) systems. This study aimed to simulate soil C dynamics in two chronosequences of land-use composed of native vegetation (NV), degraded pasture (DPA) and ICLF system in the Cerrado of Minas […]
Soil Organic Matter Quality in Jatropha spp. Plantations in Different Edaphoclimatic Conditions
09/Mar/2017
ABSTRACT The substitution of native vegetation by agricultural ecosystems can change the quantity and quality of soil organic matter (SOM), and the intensity of these changes depends on the soil type, climate, and land use. The objective of this study was to evaluate the quality of organic matter in chronosequences of Jatropha cultivation in contrasting soil and climatic conditions. Soil samples were evaluated at depths of 0.00-0.10, 0.20-0.30, and 0.80-1.00 m in chronosequences located in Planaltina, Distrito Federal (Cerrado-Pasture-Jatropha), Dourados, […]
Carbon and nitrogen stocks in soil under castor bean in the semi-arid Caatinga of Brazil
01/Nov/2012
Much of the Brazilian castor bean (Ricinus communis L.) production is concentrated in the semi-arid region (Caatinga biome) of the Northeast, as an alternative crop. The purpose of this study was to evaluate changes in C and N pools due to land use change in the Caatinga biome by castor bean production. The study was conducted on the Fazenda Floresta in the municipality of Irecê (Mid -North region of Bahia, Brazil). The climate is type BSwh (Koppen) – Semi-arid climate. […]
Modeling changes in organic carbon stocks for distinct soils in southeastern brazil after four eucalyptus rotations using the century model
01/Jun/2011
Soil organic matter (SOM) plays an important role in carbon (C) cycle and soil quality. Considering the complexity of factors that control SOM cycling and the long time it usually takes to observe changes in SOM stocks, modeling constitutes a very important tool to understand SOM cycling in forest soils. The following hypotheses were tested: (i) soil organic carbon (SOC) stocks would be higher after several rotations of eucalyptus than in low-productivity pastures; (ii) SOC values simulated by the Century […]
Potential of soil carbon sequestration in different biomes of Brazil
01/Apr/2010
Soil is an important pool for C stocks and plays a fundamental role in greenhouse gas emissions and consequently in climatic changes. Land use change can cause either a negative or a positive effect in terms of greenhouse gas emissions to the atmosphere. However, the intensification of global warming has been confirmed, related mainly to the increase of greenhouse gas emissions from burning of fossil fuel, deforestation, and adoption of inadequate agricultural land management practices. An inadequate soil use does […]
Geoecological drivers of cerrado heterogeneity and 13C natural abundance in oxisols after land-use change
01/Oct/2006
The 13C natural abundance technique was applied to study C dynamics after land-use change from native savanna to Brachiaria, Pinus, and Eucalyptus in differently textured Cerrado Oxisols. But due to differences in the d13C signatures of subsoils under native savanna and under introduced species, C substitution could only be calculated based on results of cultivated soils nearby. It was estimated that after 20 years, Pinus C had replaced only 5 % of the native C in the 0-1.2 m layer, in which substitution […]