Mixed-species plantations of <i>Eucalyptus</i> and <i>Acacia mangium</i> increase labile carbon and phosphorus levels in Ferralsol soils in the Cerrado biome, Brazil

Cabreira, Wilbert Valkinir; Pereira, Marcos Gervásio; Balieiro, F. de C.; Matos, Eduardo da Silva; Rodrigues, Renato de Aragão Ribeiro; Santos, Raissa Nascimento dos

doi:10.2989/20702620.2020.1733764

Cited by 6 publications

(2 citation statements)

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“…Despite the low fertility, high concentrations of exchangeable aluminum, and high acidity rates in the biome [ 52 , 53 ], eucalyptus stands have been able to expand due to the adaptability of this exotic species to the edaphoclimatic conditions in the Cerrado domain [ 54 , 55 ].…”

Section: Resultsmentioning

confidence: 99%

Carbon Storage in Different Compartments in Eucalyptus Stands and Native Cerrado Vegetation

Ribeiro

Gatto

Oliveira

et al. 2023

Plants

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This study evaluated Carbon (C) storage in different compartments in eucalyptus stands and native Cerrado vegetation. To determine C above ground, an inventory was carried out in the areas where diameter at breast height (DBH), diameter at base height (Db), and total tree height (H) were measured. In the stands, the rigorous cubage was made by the direct method, and in the native vegetation, it was determined by the indirect method through an allometric equation. Roots were collected by direct method using circular monoliths to a depth of 60 cm and determined by the volume of the cylinder. Samples were collected up to 100 cm deep to estimate C stock in the soil. All samples collected directly had C determined using the CHNS elemental analyzer. Gas samples were collected using a manually closed chamber, and the gas concentration was determined by gas chromatography. The results indicate high C storage in the studied areas > 183.99 Mg ha−1, could contribute to CO2 mitigation > 674.17 Mg ha−1. In addition to low emissions (<1 kg ha−1 yr−1) for the three evaluated areas, with no statistical difference in relation to the Global Warming Potential. Concerning the native cerrado vegetation conversion, the “4-year-old eucalyptus stand” seemed to restore the original soil carbon stocks in the first-meter depth, regardless of some losses that might have occurred right after establishment. Conversely, a significant loss of carbon in the soil was observed due to the alternative setting, where similar natural land was converted into agriculture, mostly soybean, and then, years later, turned into the “6-year-old eucalyptus stand” (28.43 Mg ha−1). Under this study, these mixed series of C baselines in landscape transitions have reflected on unlike C dynamics outcomes, whereas at the bottom line, total C stocks were higher in the younger forest (4-year-old stand). Therefore, our finding indicates that we should be thoughtful regarding upscaling carbon emissions and sequestration from small-scale measurements to regional scales

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Section: Resultsmentioning

confidence: 99%

Carbon Storage in Different Compartments in Eucalyptus Stands and Native Cerrado Vegetation

Ribeiro

Gatto

Oliveira

et al. 2023

Plants

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“…Intriguingly, a recent study showed that N 2 ‐fixing tree species could trigger soil acidification and weathering in secondary Neotropical forests, and also change soil microbial community to locally unlock the occluded mineral nutrients including P for uptake of themselves and adjacent non‐N 2 ‐fixing tree species (Epihov et al ., 2021). Several studies also revealed that introduced N 2 ‐fixing tree species could promote soil organic P (Po) accumulation and transformation in Eucalyptus plantations (Cabreira et al ., 2020). However, little information is available so far about introduced N 2 ‐fixing tree species impacts on soil P transformation and the underlying microbial mechanisms in Eucalyptus plantations.…”

Section: Introductionmentioning

confidence: 99%

Differential responses and mechanistic controls of soil phosphorus transformation in Eucalyptus plantations with N fertilization and introduced N₂‐fixing tree species

et al. 2023

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Summary Introducing N2‐fixing tree species into Eucalyptus plantations could replace nitrogen (N) fertilization to maintain high levels of N consumption and productivity. However, N enrichment may exacerbate phosphorus (P) limitation as Eucalyptus robusta Smith is extensively planted in P‐poor tropical and subtropical soils. We conducted a field experiment in a pure plantation of Eucalyptus urophylla × grandis to investigate the impacts of N fertilization and introduced an N2‐fixing tree of Dalbergia odorifera T. Chen on soil P transformation. Nitrogen fertilization significantly enhanced soil occluded P pool and reduced the other P pools due to acidification‐induced pH‐sensitive geochemical processes, lowering Eucalyptus leaf P concentration with higher N : P ratio. By contrast, introduced N2‐fixing tree species did not change soil pH, labile inorganic P pool, and Eucalyptus leaf N : P ratio, even enhanced organic P pools and reduced occluded P pool probably due to altering microbial community composition particularly stimulating arbuscular mycorrhiza fungal abundance. Our results revealed differential responses and mechanistic controls of soil P transformation in Eucalyptus plantations with N fertilization and introduced N2‐fixing tree species. The dissolution of occluded P pool along with organic P accumulation observed in the mixed plantations may represent a promising future to better manage soil P availability.

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Soil organic phosphorus (P) increases in mixed plantations of Acacia mangium and Eucalyptus urograndis in Planosol from Brazil

Cabreira

Pereira

Balieiro

et al. 2022

Trees

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Mixed-species plantations of Eucalyptus and Acacia mangium increase labile carbon and phosphorus levels in Ferralsol soils in the Cerrado biome, Brazil

Cited by 6 publications

References 53 publications

Carbon Storage in Different Compartments in Eucalyptus Stands and Native Cerrado Vegetation

Carbon Storage in Different Compartments in Eucalyptus Stands and Native Cerrado Vegetation

Differential responses and mechanistic controls of soil phosphorus transformation in Eucalyptus plantations with N fertilization and introduced N₂‐fixing tree species

Soil organic phosphorus (P) increases in mixed plantations of Acacia mangium and Eucalyptus urograndis in Planosol from Brazil

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Mixed-species plantations of Eucalyptus and Acacia mangium increase labile carbon and phosphorus levels in Ferralsol soils in the Cerrado biome, Brazil

Cited by 6 publications

References 53 publications

Carbon Storage in Different Compartments in Eucalyptus Stands and Native Cerrado Vegetation

Carbon Storage in Different Compartments in Eucalyptus Stands and Native Cerrado Vegetation

Differential responses and mechanistic controls of soil phosphorus transformation in Eucalyptus plantations with N fertilization and introduced N2‐fixing tree species

Soil organic phosphorus (P) increases in mixed plantations of Acacia mangium and Eucalyptus urograndis in Planosol from Brazil

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Differential responses and mechanistic controls of soil phosphorus transformation in Eucalyptus plantations with N fertilization and introduced N₂‐fixing tree species