Soil microbial properties in Eucalyptus grandis plantations of different ages

Cortez, Catharina Teixeira; Nunes, Luís Alfredo Pinheiro Leal; Rodrigues, Laura Beatriz; Eisenhauer, Nico; Araújo, Ademir Sérgio Ferreira de

doi:10.4067/s0718-95162014005000059

Cited by 15 publications

(15 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…richer in lignin, such as the bark, begins to fall and may lead to a yield of up to 5.20 tons of litter per hectare. The addition of this carbon promotes the development of the root system and microbial activity, besides contributing to a more favorable environment for aggregation (Cortez et al, 2014). WMD values in the soil under pasture conditions tended to decrease from the 0.20-m depth, with the lowest value (0.77 mm) being observed in the 0.20-0.40-m layer.…”

Section: /7mentioning

confidence: 96%

Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Pessoa

Nunes

Sousa

et al. 2018

Agraria

View full text Add to dashboard Cite

The objective of this study was to evaluate the physical attributes of an oxisol under soybean monoculture, eucalyptus monoculture, and pasture and native forest conditions at depths of 0-0.20 and 0.20-0.40 m. Disturbed and undisturbed soil samples were collected to perform physical analyses. Specific analyses included texture, soil density, macroporosity, microporosity, total porosity, aggregate stability index, weighted mean diameter, percentage of aggregates with a diameter of >2.00 mm, and soil penetration resistance (PR). The data were analyzed using the Tukey's test for the comparison of mean values and multivariate analysis. Different uses and management of the soil affected its physical attributes, resulting in the deterioration of soil quality in the soybean and pasture areas. Soil management systems in pasture and soybean areas also resulted in higher soil density and lower soil porosity. The eucalyptus monoculture showed soil aggregation equal to that of the native forest. There was a sharp increase in soil PR beyond the 0.15-m deep layer in the pasture and soybean management systems. Multivariate analysis identified variables that correlated with each type of soil management and the effects of changes in soil characteristics.

show abstract

Section: /7mentioning

confidence: 96%

Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Pessoa

Nunes

Sousa

et al. 2018

Agraria

View full text Add to dashboard Cite

show abstract

“…Studies carried out by Cortez et al (2014) showed that in the fourth year of cultivation eucalyptus can produce up to 5.20 tons of plant litter per hectare, a factor that may have provided certain environmental conditions that favored the maintenance of MBC in equal values to that of the native savanna. However, in the dry period the value of this variable in the eucalyptus did not differ from the soy and pasture.…”

Section: Resultsmentioning

confidence: 99%

“…In the dry period the greatest losses of C-CO 2 due to microbial activity occurred in the soy, eucalyptus, and pasture systems, in which there was anthropic action, which could indicate a higher energetic equilibrium in these systems (Table 3). However, other studies have shown that a high value for this variable can be the result of intense oxidizable C consumption by microorganisms for their maintenance, in circumstances in which microbial biomass finds itself under conditions of stress (CORTEZ et al, 2014;MELO., 2010). Thus, the higher values in the soy and pasture systems in the dry period appear to be strongly related to temperature, as these areas have little vegetation cover and solar radiation falls directly on the soil in this period.…”

Section: Resultsmentioning

confidence: 99%

Microbiological attributes of yellow oxissol under different monocultures in the savanna region of Piauí state

Nunes¹,

Pessoa²,

Silva³

et al. 2018

Biosci. J.

View full text Add to dashboard Cite

Microbial biomass is an important component in maintaining soil quality and plant productivity.The aim of this paper was to evaluate alterations in microbiological attributes and organic carbon in accordance with seasonal change in different monocultures in the Savanna region of Piauí state. Soil samples were collected in areas of soy, eucalyptus, pasture, and in an area of native savanna, at depths of 0-0.20 m, during the rainy and dry periods. Using these samples microbial biomass carbon (MBC), basal respiration (BR), metabolic quotient (qCO 2 ), microbial quotient (qMIC), and total organic carbon in the soil (TOC) were evaluated. MBC differed significantly between the systems evaluated, with higher values in the soil under native vegetation in the two sampling periods. TOC presented a significant difference between the systems, with higher values in the native savanna and soybean in the rainy period. For the qMIC, the soybean area presented lower values in the two periods compared with the other areas. Basal respiration as well as qCO 2 values differed between the systems only in the dry period. The results reveal that the type of vegetation cover, management system, and seasonality influence the behavior of biological properties in the soil.

show abstract

“…Conversely, soil bacterial and fungal communities have been shown to be affected by Eucalyptus plantations using PLFA (phospholipid fatty acid) analysis since the community structure was impacted significantly with the variation of planting age (Chen et al, 2013;Cao et al, 2010;Wu et al, 2013). This is contradictory to other studies reported which demonstrate that Eucalyptus plantations reduced microbial biomass, soil organic carbon and nitrogen concentrations during continuous planting (Behera & Sahani, 2003;Cortez et al, 2014).Another relevant study of secondary tropical forest (SF) converted into Eucalyptus plantations (EP) using high-throughput sequencing techniques revealed a significant difference between SF and EP samples in bacterial composition and diversity (Lan et al, 2017). Given that these tools can elucidate the impact of artificial planting, especially on the surrounding soil ecosystem affected by the functioning of microbial communities if impacted (Zhang et al, 2017;Zheng et al, 2017;Lin et al, 2017), their application will better define the response of soil microbial community diversity and function to land use shift and long-term Eucalyptus plantation, which remains obscure.…”

Section: Introductionmentioning

confidence: 84%

“…Taxonomic shifts between samples were reflected in the shifts in metabolic gene potential between the impacted and low impacted group, the result of which suggested a decrease in overrepresented functions in 2YR and 10YR impacted soils compared to low impacted potentially leading to an accumulation of metabolic products and nutrients. According to the gene families identified by PICRUSt analysis, we hypothesize that a decline in content of soil organic matter caused by breaking up macro-aggregates (Hoosbeek et al, 2006) likely triggered the increase of soil bacterial capacity to fix carbon when artificial plantation was sustained for a few years, which may partially explain microbes impacted by Eucalyptus plantings (Chen et al, 2013;Cortez et al, 2014).…”

Section: Shifts In Functional Potentialmentioning

confidence: 99%

Peer Review #2 of "Variation of soil bacterial communities along a chronosequence of Eucalyptus plantation (v0.1)"

2018

View full text Add to dashboard Cite

Eucalyptus is harvested for wood and fiber production in many tropical and subtropical habitats globally. Plantation has been controversial because of its influence on the surrounding environment however the influence of massive Eucalyptus planting on soil microbial communities is unclear. Here we applied high-throughput sequencing of the 16S rRNA gene to assess the microbial community composition and diversity of planting chronosequences, involving two, five and ten years of Eucalyptus plantation, comparing to that of secondary-forest in South China. We found that significant changes in the composition of soil bacteria occurred when the forests were converted from secondaryforest to Eucalyptus. The bacterial community structure was clearly distinct from control and five year samples after Eucalyptus was grown for two and ten years, highlighting the influence of this plantation on local soil microbial communities. These groupings indicated a cycle of impact (two-and ten-year plantations) and low impact (five-year plantations) in this chronosequence of Eucalyptus plantation. Community patterns were underpinned by shifts in soil properties such as pH and phosphorus concentration. Concurrently, key soil taxonomic groups such as Actinobacteria showed abundance shifts, increasing in impacted plantations and decreasing in low impacted samples. Shifts in taxonomy were reflected in a shift in metabolic potential, including pathways for nutrient cycles such as carbon fixation, which changed in abundance over time following Eucalyptus plantation. Combined these results confirm that Eucalyptus plantation can change the community structure and diversity of soil microorganisms with strong implications for land-management and maintaining the health of these ecosystems.

show abstract

Soil microbial properties in Eucalyptus grandis plantations of different ages

Cited by 15 publications

References 26 publications

Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Microbiological attributes of yellow oxissol under different monocultures in the savanna region of Piauí state

Peer Review #2 of "Variation of soil bacterial communities along a chronosequence of Eucalyptus plantation (v0.1)"

Contact Info

Product

Resources

About