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Total and labile organic carbon content in agroecological system.

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Pimentel, Márcio Sampaio; Oliveira, Nelson Geraldo de and De-Polli, Helvécio (2013) Total and labile organic carbon content in agroecological system. [Conteúdo de carbono orgânico total e lábil do solo em sistema agroecológico.] Revista Brasileira de Agroecologia, 8 (1), pp. 75-83.

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Online at: http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/article/view/12724

Summary

In an intercropping lettuce-carrot system submitted to crescent dosages of organic compost (0; 12; 24; 48 Mg ha-1) were monitored carbon from soil microbial biomass (MBC), labile carbon in fumigated soil (LCF), in non-fumigated soil (LCNF), in autoclaved soil (LCA) and total organic carbon (TOC) at 0-10 cm of depth. Pasture and forest areas surrounding the experiment were used as reference. Five samples from soil were evaluated at 8 days before the beginning of the experiment, 0; 6; 60 and 114 days after manuring (dam). LCF was the attribute that presented the most consistent correlation with TOC that is usually utilized to detect changes in soil organic matter. Increasing dosages of organic compost caused the increase of MBC, LCF, LCNF, LCA and TOC. From 60 days after planting and forward, MBC and LCF presented decrease of their levels according to the quality of organic compost. Pasture and forest soils behave as contrasts, holding lower and higher content of carbon of soil, respectively.

Summary translation

Em sistema de consórcio alface-cenoura submetido a doses crescentes de composto orgânico (0, 12, 24, 48 Mg ha-1) foram monitorados o carbono da biomassa microbiana do solo (CBM), carbono lábil de solo fumigado (CLF), não fumigado (CLNF), solo autoclavado (CLA) e carbono orgânico total (COT) na profundidade de 0-10 cm. Solo de pastagem e floresta adjacentes ao experimento foram usados como referência. Amostras de solo foram coletadas aos 8 dias antes da instalação, 0, 6, 60 e 114 dias após adubação. O CLF foi quem apresentou correlação mais consistente com o COT, atributo mais utilizado para detectar mudanças no conteúdo de matéria orgânica do solo. O aumento das doses de composto orgânico aumentou o conteúdo de CBM, CLF, CLNF, CLA e COT. A partir dos 60 dias após plantio, CBM e CLF apresentaram redução de seus níveis em função da qualidade do composto orgânico. Os solos de pastagem e floresta comportaram-se como contrastes, contendo menor e maior conteúdo de carbono do solo, respectivamente.

EPrint Type:Journal paper
Keywords:Matéria orgânica, Biomassa microbiana, Decomposição, Solo fumigado, Composto Organico. Organic Matter, Microbial biomass, Decomposition, Fumigated soil, Organic compost.
Agrovoc keywords:
LanguageValueURI
Englishagroecologyhttp://aims.fao.org/aos/agrovoc/c_92381
Englishorganic matterhttp://aims.fao.org/aos/agrovoc/c_5387
EnglishCarbonhttp://aims.fao.org/aos/agrovoc/c_1301
Englishbiomasshttp://aims.fao.org/aos/agrovoc/c_926
EnglishSoil fumigationhttp://aims.fao.org/aos/agrovoc/c_34236
Subjects: Farming Systems
Soil
Research affiliation: Brazil > Other organizations
ISSN:1980-9735
Related Links:http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/index
Deposited By: Pinto, Gabriela Franco
ID Code:24483
Deposited On:04 Feb 2014 13:05
Last Modified:04 Feb 2014 13:05
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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