Carbon stock and humification index of organic matter affected by sugarcane straw and soil management

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dc.contributor.authorSegnini, Aline
dc.contributor.authorCarvalho, João Luís Nunes
dc.contributor.authorBolonhezi, Denizart
dc.contributor.authorMilori, Débora Marcondes Bastos Pereira
dc.contributor.authorSilva, Wilson Tadeu Lopes da
dc.contributor.authorSimões, Marcelo Luiz
dc.contributor.authorCantarella, Heitor
dc.contributor.authorMaria, Isabella C. de
dc.contributor.authorMartin-Neto, Ladislau
dc.date.accessioned2024-05-17T00:58:38Z
dc.date.available2024-05-17T00:58:38Z
dc.date.issued2013
dc.description.abstractThe maintenance of sugarcane (Saccharum spp.) straw on a soil surface increases the soil carbon (C) stocks, but at lower rates than expected. This fact is probably associated with the soil management adopted during sugarcane replanting. This study aimed to assess the impact on soil C stocks and the humification index of soil organic matter (SOM) of adopting no-tillage (NT) and conventional tillage (CT) for sugarcane replanting. A greater C content and stock was observed in the NT area, but only in the 0-5 cm soil layer (p < 0.05). Greater soil C stock (0-60 cm) was found in soil under NT, when compared to CT and the baseline. While C stock of 116 Mg ha-1 was found in the baseline area, in areas under CT and NT systems the values ranged from 120 to 127 Mg ha-1. Carbon retention rates of 0.67 and 1.63 Mg C ha-1 year-1 were obtained in areas under CT and NT, respectively. Laser-Induced Fluorescence Spectroscopy showed that CT makes the soil surface (0-20 cm) more homogeneous than the NT system due to the effect of soil disturbance, and that the SOM humification index (H LIF) is larger in CT compared to NT conditions. In contrast, NT had a gradient of increasing H LIF, showing that the entry of labile organic material such as straw is also responsible for the accumulation of C in this system. The maintenance of straw on the soil surface and the adoption of NT during sugarcane planting are strategies that can increase soil C sequestration in the Brazilian sugarcane sector.
dc.identifier.issn0103-9016
dc.identifier.otherS0103-90162013000500006-scl
dc.identifier.urihttps://repositorio-aptaregional.agricultura.sp.gov.br/handle/123456789/1834
dc.relation.ispartofScientia Agricola
dc.subjectLaser-Induced Fluorescence Spectroscopy
dc.subjectsugarcane replanting
dc.subjectcrop residues
dc.subjectno-tillage
dc.subjectsoil organic matter
dc.titleCarbon stock and humification index of organic matter affected by sugarcane straw and soil management
dc.typeArtigos
oaire.citation.endPage326
oaire.citation.issue5
oaire.citation.startPage321
oaire.citation.volume70

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