Stability of soil organic matter in Eucalyptus regnans forests and Pinus radiata plantations in south eastern Australia

O'Brien, N. D.; Attiwill, P. M.; Weston, Christopher J.

doi:10.1016/s0378-1127(03)00163-4

Cited by 29 publications

(21 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We acknowledge that pseudo-replication is a limitation of the present study, as in many other paired-site and chronosequence studies (Sá et al, 2001;Vesterdal et al, 2002;O'Brien et al, 2003;Chen et al, 2004). Since each stand within a given region was separated by at least 100 m, we believe that the treatment effects are almost certainly more substantial than any possible site differences, given the severity of the treatments.…”

Section: Discussionmentioning

confidence: 79%

Using light fraction and macroaggregate associated organic matters as early indicators for management-induced changes in soil chemical and biological properties in adjacent native and plantation forests of subtropical Australia

Chen

et al. 2008

Geoderma

View full text Add to dashboard Cite

Land use and management Forest Soil chemical and biological processes Soil physical structure causes differential accessibility of soil organic matter (SOM), including carbon (C) and nitrogen (N) pools, to decomposer organisms and is an important determinant of SOM storage. Physical fractionation method of SOM in conjunction with elemental as well as isotopic analyses (C, N, δ 13 C, δ 15 N) of those soil fractions are used in this study to determine the land use and management-induced changes of SOM and associated processes in three adjacent sites of native forest (NF), first (1R) and second rotation (2R, including tree planting row (2R-T) and windrow of harvest residues (2R-W)) of hoop pine plantations in southeast Queensland, Australia. The results suggest that there is a greater accumulation of C and N in the light fraction (LF) of NF site than that of plantation sites (1R and 2R), and the C and N losses following conversion from mixed species NF to the single-species plantation are attributed to the reduction in C and N stocks for all physical fractions separated by wet sieving. In contrast, the C and N losses induced by the rotation practices (e.g., between 1R and 2R-T) are attributed to the C and N decreases in the LF and macroaggregates (250-2000 µm) only. The C and N increases upon the residue management (e.g., between 2R-W and 2R-T) are primarily attributed to the C and N increases in the LF and macroaggregates as well. Coupled with 30 soil chemical and biological parameters obtained in our previous studies, further principal component and multivariable regression analyses were conducted and the results showed that both the LF and macroaggregates were highly related to the status of C and N pools, the processes of N transformation and soil respiration, and the diversity of microbial communities, and thus could serve as diagnostic SOM fractions responsible for the changes of soil properties and processes within the tested ecosystem induced by the land uses and management practices. Knowledge of the interactive relationships between aggregate classes within SOM and soil chemical and biological processes in this study represents a further step towards diagnostically measuring and understanding important soil C and N processes in response to the land use and management changes in the soil ecosystems such as forests in subtropical Australia.

show abstract

Section: Discussionmentioning

confidence: 79%

Using light fraction and macroaggregate associated organic matters as early indicators for management-induced changes in soil chemical and biological properties in adjacent native and plantation forests of subtropical Australia

Chen

et al. 2008

Geoderma

View full text Add to dashboard Cite

show abstract

“…The Kyoto Protocol has drawn attention to terrestrial ecosystems as potential sinks for atmospheric carbon dioxide (O'Brien et al, 2003). Because soils contain nearly twice as much carbon (C) as the vegetation, a better understanding of soil organic carbon (SOC) distribution and its stabilization mechanisms is important (Mann, 1986).…”

Section: Introductionmentioning

confidence: 99%

Soil Organic Carbon and Its Fractions Across Vegetation Types: Effects of Soil Mineral Surface Area and Microaggregates

Wang

Ouyang

2009

Pedosphere

View full text Add to dashboard Cite

Soil organic carbon (SOC) can act as a sink or source of atmospheric carbon dioxide; therefore, it is important to understand the amount and composition of SOC in terrestrial ecosystems, the spatial variation in SOC, and the underlying mechanisms that stabilize SOC. In this study, density fractionation and acid hydrolysis were used to assess the spatial variation in SOC, the heavy fraction of organic carbon (HFOC), and the resistant organic carbon (ROC) in soils of the southern Hulun Buir region, northeastern China, and to identify the major factors that contribute to this variation. The results showed that as the contents of clay and silt particles (0-50 μm) increased, both methylene blue (MB) adsorption by soil minerals and microaggregate contents increased in the 0-20 and 20-40 cm soil layers (P < 0.05). Although varying with vegetation types, SOC, HFOC, and ROC contents increased significantly with the content of clay and silt particles, MB adsorption by soil minerals, and microaggregate content (P < 0.05), suggesting that soil texture, the MB adsorption by soil minerals, and microaggregate abundance might be important factors influencing the spatial heterogeneity of carbon contents in soils of the southern Hulun Buir region.

show abstract

“…The net change will probably depend on previous land use (Silver et al, 2000). In a study conducted in an area under regenerated native forest (E. regnans) after wild fire in Australia, O'Brien et al (2003) observed that E. regnans cultivation (10 to > 250 years) resulted in increases of the SOC content, but the decrease in soil density permitted no gains in the SOC stocks. Evaluating soil C sequestration under different exotic species in the Southwestern highlands of Ethiopia, Lemma et al (2006) observed that 20 years after afforestation with E. grandis after 35 consecutive years of pasture and 20 years of agriculture the SOC returned to nearly the level of the native forest.…”

Section: Discussionmentioning

confidence: 99%

“…SOC stock on a fixed depth basis can be affected if corrections are not applied because the bulk density of managed soils is usually greater than of undisturbed sites (Ellert & Bettany, 1995). We are aware that the use of pseudoreplications is a limitation of the present study, as in many other paired-site studies (Vesterdal et al, 2002;O'Brien et al, 2003;Chen et al, 2004, Lima et al, 2006. Considering that each stand of a given site was separated by at least several kilometers from other eucalyptus stands, we are sure that randomness and independence were ensured, as pointed out in a previous study (Lima et al, 2006).…”

Section: Soil Analysismentioning

confidence: 95%

“…However, in a study carried out in Australia, Mendham et al (2004) observed no difference in the SOC stock when comparing Eucalyptus globulus (11-14 years) with pasture in the 0-10 cm layer. On the other hand, O'Brien et al (2003) observed that E. regnans (10 -> 250 years) contributed to increase the C contents in former pasture areas in Australia. Also, Lima et al (2006Lima et al ( , 2008 observed an increase in soil C stocks (0-20 cm) after four eucalyptus rotations in two areas originally under degraded pasture in Minas Gerais, Brazil.…”

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Modeling changes in organic carbon stocks for distinct soils in southeastern brazil after four eucalyptus rotations using the century model

Lima

Silva

Stape

et al. 2011

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

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 model would describe the data better than the mean of observations. So, the aims of the current study were: (i) to evaluate the SOM dynamics using the Century model to simulate the changes of C stocks for two eucalyptus chronosequences in the RESUMO: MODELAGEM DAS MUDANÇAS NOS ESTOQUES DE CARBONO ORGÂNICO DE SOLOS DISTINTOS APÓS QUATRO ROTAÇÕES DO EUCALIPTO NO SUDESTE DO BRASIL COM O MODELO CENTURY A matéria orgânica do solo (MOS) tem importantes funções no ciclo de C e na qualidade do solo. Considerando a complexidade dos fatores que controlam a ciclagem da MOS e o tempo necessário para que as mudanças sejam nela observadas, a modelagem constitui uma ferramenta muito importante para entender a ciclagem da MOS em solos florestais. As hipóteses do estudo foram: o cultivo do eucalipto por várias rotações resultaria no aumento dos estoques de C do solo, quando comparado a pastagens degradadas; e os valores dos estoques de C do

show abstract

Stability of soil organic matter in Eucalyptus regnans forests and Pinus radiata plantations in south eastern Australia

Cited by 29 publications

References 36 publications

Using light fraction and macroaggregate associated organic matters as early indicators for management-induced changes in soil chemical and biological properties in adjacent native and plantation forests of subtropical Australia

Using light fraction and macroaggregate associated organic matters as early indicators for management-induced changes in soil chemical and biological properties in adjacent native and plantation forests of subtropical Australia

Soil Organic Carbon and Its Fractions Across Vegetation Types: Effects of Soil Mineral Surface Area and Microaggregates

Modeling changes in organic carbon stocks for distinct soils in southeastern brazil after four eucalyptus rotations using the century model

Contact Info

Product

Resources

About