Carbon Accumulation and Partitioning Above and Belowground under Coppiced and Replanted Eucalypt Plantations

Author:

Pegoraro Rodinei F1ORCID,Silva Ivo R2ORCID,Souza Ivan F2ORCID,Novais Roberto F2,Barros Nairam F2ORCID,Fonseca Sebastião3

Affiliation:

1. Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, 39404-547 Montes Claros, MG, Brazil

2. Departamento de Solos, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil

3. Clari Consultoria Florestal, 29199-000 Aracruz, ES, Brazil

Abstract

Abstract The extent to which the C sink strength of eucalypt plantations can be affected by coppicing or replanting remains unclear. To address this issue, we evaluated variations in C stocks under coppiced or replanted eucalypt stands formed by clones or seedlings. For each field assessment (0 [T0], 2.5, 3.5, 4.5, 5.5 and 7.0 years [at harvest]), tree biomass, litterfall, and soil C stocks (0–120 cm depth) were determined. At harvest, debarked stemwood productivity was similar under coppice or replanting, about 50.0 Mg C ha–1. Generally, coppiced stands favored subsoil C storage (40–100 cm), whereas replanted stands favored soil C accrual in topsoil (0–20 cm), depending on the genetic material. Relative to T0, soil C increased about 2.14, 1.91, and 1.84 Mg C ha–1 yr–1 under coppice, replanting with seedlings and clones, respectively. Coarse root biomass under these stands were about 17.3, 13.4, and 9.5 Mg C ha–1, respectively, equivalent to 50% of total harvest residues. Hence, inputs from coarse roots could represent a large contribution to soil C over multiple rotations under coppiced or replanted stands. Otherwise, short-term C losses can be high where stumps and coarse roots are harvested, especially following successive coppice cycles. Study Implications: Our findings have important implications for forest managers growing eucalypt plantations aiming to maximize C accumulation. Both coppiced and replanted stands can fix up to 50 Mg C ha−1 only in debarked stemwood over 7 years, with a comparatively higher C storage in coarse roots under coppice. Despite the increasing demand for forest residues in bioenergy production, harvesting stumps and coarse roots should be avoided, especially upon replanting eucalypt stands after successive coppice cycles.

Funder

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Fundação de Amparo à Pesquisa de Minas Gerais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Publisher

Oxford University Press (OUP)

Subject

Ecological Modeling,Ecology,Forestry

Reference43 articles.

1. Towards a global-scale soil climate mitigation strategy;Amelung;Nat. Commun.,2020

2. Atmosphere–soil carbon transfer as a function of soil depth;Balesdent;Nature,2018

3. Evaluation of the biomass production, energy yield and nutrient removal of Eucalyptus dunnii Maiden grown in short rotation coppice under two initial planting densities and harvest systems;Bentancor;Biomass Bioenerg.,2019

4. Eucalyptus plantation effects on soil carbon after 20 years and three rotations in Brazil;Cook,2016

5. Evidence of limited carbon sequestration in soils under no-tillage systems in the Cerrado of Brazil;Corbeels,2016

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