Biological functioning of Brazilian Cerrado soils under different vegetation types

Mendes, I. C.; Fernandes, Marcelo Ferreira; Chaer, Guilherme Montandon; Reis, Fábio Bueno dos

doi:10.1007/s11104-012-1195-6

Cited by 62 publications

(27 citation statements)

References 31 publications

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“…This result indicates that the seasons affect the soil microbial biomass status in Brazilian Cerrados (Mendes et al, 2012). Our study region presents two main seasons that differ by rainfall regime, and this characteristic alters soil moisture, which influences the soil microbial biomass and activity.…”

Section: Discussionmentioning

confidence: 66%

“…In our study, we can highlight the finding of the highest TOC in CSS and CD compared with CG, which also influenced soil microbial biomass. According to Mendes et al (2012), TOC was an important factor influencing soil microbial biomass and activity in the Cerrado SS and Cerradao. In a study in Cerrado from the Central Plateau, Mendes et al (2012) observed that Cerradao had higher levels of organic C and soil microbial biomass than grassland.…”

Section: Discussionmentioning

confidence: 99%

“…However, in the rainy season, the lowest basal respiration in CG suggests a limitation of C in the soil for soil microorganisms, which can be confirmed by the results from microbial indices, i.e., qCO 2 and qMic, which presented high and low values in CG, respectively. Thus, some limiting factors for microbial biomass, such as a low amount of organic residues (Gama-Rodrigues & Gama-Rodrigues, 2008) and soil moisture (Mendes et al, 2012), may have contributed to the use of C by soil microorganisms for their maintenance, increasing qCO 2 . Therefore, on one hand, microbial biomass decreases, thereby reducing qMic, on the other, the highest qMic values found in CSS and CD reflect the microbial efficiency in converting organic C into microbial C (Leite et al, 2003;Fernandes et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies in the Brazilian Cerrado have shown that physiognomies with arboreal formation, such as Cerradao, present higher microbial biomass and activity (Nardoto & Bustamante, 2003;Mendes et al, 2012). However, the studies reported by Nardoto & Bustamante (2003) and Mendes et al (2012) evaluated unprotected Cerrado vegetation from the Central Plateau.…”

Section: Introductionmentioning

confidence: 95%

“…However, the studies reported by Nardoto & Bustamante (2003) and Mendes et al (2012) evaluated unprotected Cerrado vegetation from the Central Plateau. Thus, the behavior of the soil microbial biomass in a vegetation gradient in a protected Brazilian Cerrado, such as Sete Cidades National Park, remains unclear.…”

Section: Introductionmentioning

confidence: 99%

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Soil Microbial Biomass Across a Gradient of Preserved Native Cerrado

et al. 2018

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The different physiognomies and soil conditions across the Cerrado gradient may influence soil microbial biomass. The present study evaluated the soil microbial biomass and enzyme activity across a preserved Cerrado gradient and correlated these with environmental conditions. The site, sampling period and their interaction influenced soil microbial biomass and activity. Soil conditions, i.e., chemical and microclimatic properties, varied across the Cerrado gradient and influenced soil microbial biomass and activity. The highest and lowest values for microbial biomass and enzyme activity were found in Cerradao and Campo graminoide, respectively, during both seasons. Multivariate analysis showed that the sites were clearly separated into different groups, indicating that distinct physiognomies and environmental conditions influenced soil microbial biomass and enzyme activities.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Soil Microbial Biomass Across a Gradient of Preserved Native Cerrado

et al. 2018

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Methodologies for applying calcium compounds in agropastoral systems: Changes in soil chemical attributes

et al. 2021

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Soil pH values below 4.4 (acidity) limit nutrient availability and root exploration, whereas a pH range of 5.4–6.4 ensures the availability of most nutrients essential for crops. To ameliorate acidity in the surface and subsurface layers and improve soil chemical fertility, different application methodologies (surface, incorporation by soil tillage, or subsurface) for calcium (Ca) compounds (limestone [LS], phosphogypsum [PG], and hydrated lime [HL]) were evaluated in an Arenic Hapludult in an agropastoral system in Brazil. The experimental design comprised randomized blocks with four replications of seven treatments. After three seasons, all methodologies corrected surface acidity (0.0–0.2 m) by increasing pH and base saturation (BS) and reducing total acidity, but only subsurface application of HL plus surface application of PG in the first year and surface application of HL in subsequent years increased pH and BS in the subsurface (0.4–0.8 m). Consequently, incorporation of LS and subsurface application of HL in the first year are necessary to reduce total acidity in the subsurface (0.4–0.8 m) in subsequent years. Applying LS or HL plus PG increased sulfur (S)–SO4 content throughout the soil profile (0.0–0.8 m). In addition, in the 0.0‐to‐0.2‐m layer, applying LS plus PG increased Ca2+ content and Ca2+/cation exchange capacity (CEC), and applying HL plus PG increased magnesium (Mg)2+ content and Mg2+/CEC. However, these results may be specific to the agronomic conditions of the trial; future studies should evaluate whether the timing of changes in soil chemical fertility varies depending on soil type.

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The Brazilian Cerrado: assessment of water and soil degradation in catchments under intensive agricultural use

et al. 2014

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The Brazilian Cerrado is recognized as one of the most threatened biomes in the world, as the region has experienced a striking change from natural Cerrado vegetation to intense cash crop production. This paper reviews the history of land conversion in the Cerrado and the development of soil properties and water resources under past and ongoing land use. We compared soil and water quality parameters from different land uses considering 80 soil and 18 water studies conducted in different regions across the Cerrado to provide quantitative evidence of soil and water alterations from land use change. Following the conversion of native Cerrado, significant effects on soil pH, bulk density and available P and K for croplands and less-pronounced effects on pastures were evident. Soil total N did not differ between land uses because most of the sites classified as croplands were nitrogen-fixing soybeans, which are not artificially fertilized with N. In contrast, water quality studies showed nitrogen enrichment in agricultural catchments, indicating fertilizer impacts and potential susceptibility to eutrophication. Regardless of the land use, P is widely absent because of the high-fixing capacities of deeply weathered soils and the filtering capacity of riparian vegetation. Pesticides, however, were consistently detected throughout the entire aquatic system. In several case studies, extremely high-peak concentrations exceeded Brazilian and European Union (EU) water quality limits, which were potentially accompanied by serious health implications. Land use intensification is likely to continue, particularly in regions where less annual rainfall and severe droughts are projected in the northeastern and western Cerrado. Thus, the leaching risk and displacement of agrochemicals are expected to increase, particularly because the current legislation has caused a reduction in riparian vegetation. We conclude that land use intensification is likely to seriously limit the Cerrado's future regarding both agricultural productivity and ecosystem stability. Because only limited data are available, we recommend further field studies to understand the interaction between terrestrial and aquatic systems. This study may serve as a valuable database for integrated modelling to investigate the impact of land use and climate change on soil and water resources and to test and develop mitigation measures for the Cerrado.

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Biological functioning of Brazilian Cerrado soils under different vegetation types

Cited by 62 publications

References 31 publications

Soil Microbial Biomass Across a Gradient of Preserved Native Cerrado

Soil Microbial Biomass Across a Gradient of Preserved Native Cerrado

Methodologies for applying calcium compounds in agropastoral systems: Changes in soil chemical attributes

The Brazilian Cerrado: assessment of water and soil degradation in catchments under intensive agricultural use

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