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- Title
Relação de estratificação como indicador do sequestro de carbono em macroagregados de Latossolo sob plantio direto.
- Authors
de Oliveira Ferreira, Ademir; de Moraes Sá, João Carlos; Harms, Mônica Gabrielle; Miara, Simone; Briedis, Clever; Netto, Caio Quadros; dos Santos, Josiane Burkner; dos Santos Canalli, Lutécia Beatriz; dos Santos Dias, Carlos Tadeu
- Abstract
The decrease in soil organic carbon (SOC) content in deeper layers indicates the occurrence of stratification between the surface layer and subsurface layer of soil due to continuous C addition by crop residues. The objective was to evaluate the change (delta) of stratification (RE) of carbon (C) as an indicator of C sequestration and soil total and particulate soil in macroaggregates of two soils (Typic Hapludox) with different textures, managed in no-tillage system. The tests were developed in completely randomized design twelve repetitions.Analyzed factors were: (a) two soils: Oxisol with medium texture and Oxisol with clay texture, (b) sampling depth: 0-5 and 5-20cm, (c) two sampling times (October 2007-T1, September 2008-T2). The results were submitted to variance analysis by program SISVAR 5.3, using the Tukey test at 5% significance. There was a significant linear relationship between the Δ RE and carbon sequestration rate total macroaggregates Oxisol with medium texture (R2=0.78**) and Oxisol with clay texture (R2=0.81**) indicating that there was C sequestration confirming to be a sensitive indicator of the rate of C sequestration in soil macroaggregates.
- Subjects
SEED stratification; CARBON sequestration; OXISOLS; NO-tillage; CARBON in soils
- Publication
Ciência Rural, 2012, Vol 42, Issue 4, p645
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/S0103-84782012000400011