Matéria Orgânica e Biomassa Microbiana em Plantios de Eucalipto no Cerrado Piauiense

Fernandes, Mílton Marques; Carvalho, Marla Guedes Cordeiro; Araujo, Jader Magno Rodrigues de; Melo, Francisco Rodolfo; Silva, Carlos Alberto; Sampaio, F. de M. T.; Lobato, Márcio Godofrêdo Rocha

doi:10.4322/floram.2012.061

Cited by 8 publications

(10 citation statements)

References 20 publications

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“…SOM fractions such as LOM and MB can be considered as early indicators of SOM changes. The fast response of MB and LOM to changes in soil has been evidenced by others authors (Fernandes et al, 2012;Barreto et al, 2014). The trend of the faster reestablishment of the microbial population over time (after four years of reform management) points to the dynamism of this fraction.…”

Section: Discussionsupporting

confidence: 57%

Soil Organic Matter Fractions Under Eucalypt Plantation in Reform Management

et al. 2019

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Harvesting and reform in eucalyptus can lead to changes in soil organic matter (SOM). The objective of this work was to evaluate the changes in total organic C (TOC) and N (NT), C and N in humic acid (HA), fulvic acid (FH), light organic matter (LOM) and microbial biomass (MB), in Ultisol of eucalypt stands over one, two and four years of renovated areas in Rio Grande do Sul state. After the first year of eucalyptus reform, there were 78% of increases in TOC (0.0-1.0-m soil layer). After two years, there was an increase in TN and an average reduction of 52% in LOM-C (0.0-0.1-m soil layer). FA-C, HA-C, and HU-C presented mean reductions of 43 Mg ha -1 (0.0-1.0-m soil layer) after four years of reform. The litter contribution of previous crop and the crop residues from the harvest resulted in increments of the SOM fractions. However, there is a negative effect in later years.

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Section: Discussionsupporting

confidence: 57%

Soil Organic Matter Fractions Under Eucalypt Plantation in Reform Management

et al. 2019

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“…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%

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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“…A partir dessa avaliação, pode-se dizer que, de maneira geral, os ecossistemas florestais plantados tendem a estabelecer condições adequadas a vida do solo, com alguma ressalva para o pinus. Provavelmente, as diferenças encontradas se devem à constituição físico-química do material aportado pelos diferentes tipos de cobertura vegetal (COBO et al, 2002;FERNANDES et al, 2012), ou seja, a presença de compostos inibidores à atividade microbiana na necromassa de algumas espécies de eucalipto e em especial no pinus, como compostos fenólicos e resinas, TABELA 1 Fertilidade do solo da camada de 0-5 cm sob diferentes ecossistemas florestais avaliados. ); V: saturação por bases (%); m: saturação por alumínio (%); MO: matéria orgânica (%).…”

Section: Fertilidade Do Solo E Crescimento Das áRvoresunclassified

“…Os valores similares de respiração basal dos grupos podem estar relacionados a dois fatores básicos: ao grau de estabilidade dos ecossistemas (ROSCOE; MACHADO, 2002) ou a energia despendida por cada material para sua decomposição (FERNANDES et al, 2012).…”

Section: Parâmetros Microbiológicos Do Solounclassified

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Biomassa E Atividade Microbiana Sob Diferentes Coberturas Florestais

Braga

Sousa

Venturin

et al. 2016

CERNE

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BIOMASSA E ATIVIDADE MICROBIANA SOB DIFERENTES COBERTURAS FLORESTAISRESUMO BIOMASS AND MICROBIAL ACTIVITY UNDER DIFFERENT FOREST COVERSABSTRACT: This study evaluated the soil fertility, biomass and microbial activity of the soil under forest cover of Eucalyptus grandis, Eucalyptus pilularis, Eucalyptus cloeziana and Corymbia maculata; Pinus Caribbean var. hondurensis, 40 years old, and a fragment of Semideciduous Forest, located on the campus of the Federal University of Lavras. In soil samples collected in the 0-5 cm layer were determined fertility parameters, basal respiration and microbial biomass carbon. The results showed that for the species E. grandis and E. cloeziana the carbon of biomass microbial content was higher than for any other ecosystem evaluated, and equal to those observed under native forest. In contrast, the ground under Pinus had the lowest microbiological indexes. Under C. maculata and E. pilularis the contents were intermediate for this parameter. The basal respiration of all ecosystems was equal. The fertility level was very low in all types of evaluated vegetation.

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Matéria Orgânica e Biomassa Microbiana em Plantios de Eucalipto no Cerrado Piauiense

Cited by 8 publications

References 20 publications

Soil Organic Matter Fractions Under Eucalypt Plantation in Reform Management

Soil Organic Matter Fractions Under Eucalypt Plantation in Reform Management

Soil Microbial Biomass Across a Gradient of Preserved Native Cerrado

Biomassa E Atividade Microbiana Sob Diferentes Coberturas Florestais

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