Soil Chemical Changes and Resemblances in a Chronosequence Rainforest-Sugarcane-Pastureland in the Atlantic Forest Biome

Lima, Hugo Neves de Barros; Coêlho, Janerson José; Júnior, José Carlos Batista Dubeux; Santos, Erick R. S.; Cunha, Márcio Vieira da; Mello, Alexandre Carneiro Leão de; Santos, Mércia Virgínia Ferreira dos

doi:10.1590/01047760202026042745

Cited by 1 publication

(2 citation statements)

References 31 publications

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“…This result indicates a predominance of C 3 plants (FIGURE 4f). Similar findings were reported for Atlantic Forest sites (MACHADO et al, 2019) and other Brazilian biomes (LOSS et al, 2014;PEREIRA et al, 2020).…”

Section: Resultssupporting

confidence: 88%

“…Isotopic analyses have also been used to study organic matter cycling in the medium term in tropical regions where forests (C 3 photosynthetic cycle) have been replaced by crops (C 4 photosynthetic cycle) (MACHADO et al, 2019;LIMA et al, 2020). Compared with C 3 plants, C 4 plants discriminate less between C isotopes and are more enriched in 13 C; as a result, δ 13 C values range from −6 to −19‰ (mean of −13‰) in C 4 plants and from −20 to −34‰ (mean of −27‰) in C 3 plants (SMITH; CHALK, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Impact of forest–pasture conversion on soil physical and chemical properties

Dortzbach¹,

Pereira²,

González³

et al. 2022

R. Agrogeoambiental

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The objective of this paper is to assess the changes in soil physical and chemical properties resulting from the conversion of native forest to pasture and pasture to secondary forest in the state of Santa Catarina, Brazil. Seven forest–pasture successional stages were identified using aerial photographs and satellite images acquired in 1957, 1978, and 2008. Successional stages were coded as FFF, FPF, PFF, PPF, FPP, FFP, and PPP, where the first, second, and third letters refer to the land uses (P, pasture; F, forest) practiced in 1957, 1978, and 2008, respectively. Soil samples were collected by layer at depths of 0–10, 10–20, 20–40, 40–60, 60–80, and 80–100 cm. Clay contents, soil bulk density (Db), macroporosity (MP), microporosity (mP), pH, Aluminum (Al), cation exchange capacity (CEC), calcium (Ca), potassium (K), phosphorus (P), total organic carbon (TOC) content, carbon stock, and δ13C abundance were quantified. Conversion of forest to pasture increased soil P, K, Ca, Db, and mP; and reduced MP, TOC content, and carbon stocks. The largest carbon stocks occurred in sites occupied by forests but previously used as pastures. Forest and pasture age influenced δ13C values, resulting in different isotopic signatures for different sites, confirming the transition from C3 to C4 plants. In 50-year-old pastures, about 66 % of soil TOC is still derived from the primary forest biomass.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%