Soil Carbon Fractions in Rubber Trees, Pasture, and Secondary Forest Areas

Abstract

This study quantify the total organic carbon content, light fraction organic matter (LFOM), and soil organic matter fractions (from chemical and physical fractionations) in four different cultivation areas: 1 and 2) rubber tree clonal plantations (FX 3864 and IAN 873); 3) a pasture; and 4) a secondary forest. The research was carried out using soil samples from clonal plantations of eight-year-old rubber trees, located in the coastal plain (Tabuleiros Costeiros) of the state of Rio de Janeiro. The difference in the management of the rubber tree clone area promoted improvements in the soil quality, as it increased the carbon contents of the granulometric fractions, LFOM, and humic substances from the IAN 873 clone area. Both rubber tree areas evaluated presented higher mineral-associated organic carbon levels and humic substances than did the pasture area, reinforcing the reforestation potential of areas with degraded pastures through hevea culture.

Carbono E Nitrogênio Do Solo Em Povoamento De Schizolobium Parahyba Var. Amazonicum Estabelecido Em Diferentes Espaçamentos

“…As maiores médias dos teores de C observadas na camada de 0-20 cm, é consistente com outros estudos semelhantes de distribuição de C em profundidade do solo (ASSEFA et al, 2017;FREITAS et al, 2018), sendo associado ao aporte de resíduo vegetal depositado na camada superficial do solo, proveniente de galhos, folhas, casca e sistema radicular (DINIZ et al, 2020).…”

Influence of land use and occupation on the chemical and physical fractions of organic matter in cultivated and native areas in the Atlantic Forest biome

“…In addition, in natural environments the stock of C is in balance between the rates of entry and exit, and when they present some type of disturbance that influences litter deposition (Barros and Fearnside, 2016), it ends up modifying the dynamics of C stock in these areas (Rosset et al, 2014;Loss et al, 2015;Koven et al, 2017). However, in many cases, only the quantification of C is not enough to identify possible changes in the quality of the edaphic environment (Diniz et al, 2020).…”