Decomposition of eucalypt harvest residues as affected by management practices, climate and soil properties across southeastern Brazil

Souza, Ivan F.; Barros, Nairam Félix de; Silva, Ivo Ribeiro da; Renier, Robert Ferraz; Silva, Lucas de Ávila; Novais, Roberto Ferreira

doi:10.1016/j.foreco.2016.05.012

Cited by 22 publications

(9 citation statements)

References 47 publications

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“…Bark often has the slowest decomposition rates observed among eucalyptus HR components (Shammas et al 2003, Epron et al 2006, Hernández et al 2009). However, recent studies have shown that bark retention might accelerate eucalyptus HR decomposition in nutrient‐poor tropical sites because (1) it creates a physical protection that results in optimized conditions for decomposition, for example, higher humidity and protection against disturbances; and (2) its high nutrient content, especially calcium, offsets any possible inhibitory effect of chemical complexity (Souza et al 2016, Ferreira et al 2016). In our study, bark had a negligible effect on HR decomposition.…”

Section: Discussionmentioning

confidence: 99%

“…The proportions used and HR chemical characterization are shown in Supplemental Table 1. More details about HR chemical composition can be obtained elsewhere (Souza et al 2016, Ferreira et al 2016).…”

Section: Methodsmentioning

confidence: 99%

“…These results are the opposite of those found in the same site and treatments during initial decomposition stages, i.e., first year (Oliveira et al 2021), when bark presence accelerated decomposition while N had no influence. The previously observed accelerated decomposition of HR with bark could have been due to faster decomposition of the bark itself (Souza et al 2016), or the other components when bark was present (e.g., a priming effect of bark on these other residues), or both. We cannot separate these mechanisms, but our results suggest that bark effects were most pronounced during initial decomposition stages and became less important as decomposition progressed.…”

Section: Hr Decompositionmentioning

confidence: 96%

See 2 more Smart Citations

Retaining eucalyptus harvest residues promotes different pathways for particulate and mineral‐associated organic matter

Ferreira

Oliveira²,

Soares³

et al. 2021

Ecosphere

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Hr Decompositionmentioning

confidence: 96%

See 1 more Smart Citation

Retaining eucalyptus harvest residues promotes different pathways for particulate and mineral‐associated organic matter

Ferreira

Oliveira²,

Soares³

et al. 2021

Ecosphere

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“…The use of stable isotope techniques (e.g., 13 C) to assess the contribution of different vegetative sources of SOM (Epron, Mouanda, Mareschal, & Lydie‐Stella, ; Hernández et al, ; Souza et al, ), alterations in SOM due to land‐use changes (Vilas Boas, Almeida, Teixeira, Souza, & Silva, ), and to discern the origins of soil C–CO 2 (Millard, Midwood, Hunt, Barbour, & Whitehead, ; Oliveira et al, ) has been reported widely in the literature. In these studies, for the 13 C isotope technique to be useful, there must either be differences in the natural 13 C abundances between soils (soils cultivated with C 3 or C 4 plants) and plants (C 3 or C 4 plants) or a 13 C enrichment in the plant material ( 13 C labelling).…”

Section: Introductionmentioning

confidence: 99%

Short‐term carbon emissions: Effect of various tree harvesting, transport, and tillage methods under a eucalyptus plantation

Fialho

Teixeira

et al. 2018

Land Degrad Dev

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Eucalyptus forests stand out for their potential to sequestrate atmospheric CO 2 in soil organic matter throughout their growth. Our study evaluated the harvesting and tillage effect in eucalyptus plantations to the soil CO 2 , 13 C-CO 2 , and CH 4 fluxes. This study was carried out in a eucalyptus plantation, on Typic Haplustox soil. The study used stands cultivated with eucalyptus at the end of the first rotation (7 years), established over degraded pastures. The effect of harvesting was assessed through comparisons of samples taken before and after harvesting with Feller + Skidder (F + S) and Harvester + Forwarder (H + F) methods and separate samples of plant rows (R) and plant interrows (IR). The effect of tillage was assessed through comparisons of R and IR samples taken before and after subsoiling tillage in areas harvested with F + S and H + F methods. A nested experimental design was used with eight replicates. The harvest operation (F + S and H + F methods) in eucalyptus plantationsincreased soil CO 2 fluxes, which were primarily derived from eucalyptus materials ('new C'). The F + S harvesting method resulted in the highest soil density and soil moisture reduction in the IR. The tillage operation (subsoiling) resulted in higher soil CO 2 fluxes in eucalyptus plantations harvest with F + S and H + F methods. However, the H + F method preserved the older soil organic carbon (40.8% in R and 50.4% IR of C 4 -CO 2 ). The soil in the eucalyptus plantations showed soil CH 4 influxes, and the harvest and tillage (subsoiling) operations did not negatively affect the net soil CH 4 influx in the studied eucalyptus plantations.

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“…While burning can initially improve soil fertility, it can also lead to large losses of N via volatilisation [10][11][12][13], and P, Ca, and K through leaching, as well as water and wind erosion [13][14][15]. Retention of harvest residues, especially bark, acts to conserve nutrients and leads to their controlled release in a way that minimizes losses from leaching and potentially supplies the amount of nutrients required for stand development in the next rotation [16][17][18][19][20]. Hence, understanding decomposition rates and nutrient release from harvest residues, including bark, is important for informing residue and nutrient management over successive rotations.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Harvest Residues to Nutrient Cycling in a Tropical Acacia mangium Willd. Plantation

Bich

Eyles

Mendham

et al. 2018

Forests

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Harvest residues can play a crucial role in conserving nutrients for recycling in forests, but little is known about the rates of decomposition and nutrient release from these residues following logging in tropical acacia plantations. In this study, we examined the biomass and nutrient content of harvest residue components (bark, leaves, and branches) using the litterbag technique for a 1.5-year-period following harvest of a seven-year-old Acacia mangium plantation in Northern Vietnam. At harvest, the total dry biomass of harvest residues was 18 t ha−1 comprising bark (8.9 t ha−1), branches (6.6 t ha−1), and leaves (2.5 t ha−1). The retained bark on site conserved 51% N, 29% P, 32% K, 64% Ca, and 24% Mg content from harvest residues for recycling. Decomposition rate of the leaves was the most rapid (k = 1.47 year−1; t0.5 = 0.47 year), then branches (k = 0.54 year−1; t0.5 = 1.29 year), and bark (k = 0.22 year−1; t0.5 = 3.09 year). During decomposition, the loss of nutrients from harvest residues was K ≈ Ca > N > P> Mg. Decomposition of harvest residues and the associated rate of nutrient release can potentially supply a significant amount of nutrients required for stand development in the next rotation.

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Decomposition of eucalypt harvest residues as affected by management practices, climate and soil properties across southeastern Brazil

Cited by 22 publications

References 47 publications

Retaining eucalyptus harvest residues promotes different pathways for particulate and mineral‐associated organic matter

Retaining eucalyptus harvest residues promotes different pathways for particulate and mineral‐associated organic matter

Short‐term carbon emissions: Effect of various tree harvesting, transport, and tillage methods under a eucalyptus plantation

Contribution of Harvest Residues to Nutrient Cycling in a Tropical Acacia mangium Willd. Plantation

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