NDLI: Carbon fractions as sensitive indicators of quality of soil organic matter

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Carbon fractions as sensitive indicators of quality of soil organic matter

Content Provider	Consultative Group on International Agricultural Research (CGIAR)
Author	Westerhof, R Vilela, Lourival Ayarza, Miguel Angel Zech, W.
Description	Soil organic matter quality is usually seen as a major attribute of soil quality. In this study, we extracted organic carbon with water (WEOC) or with potassium permanganate (PEOC). We assessed these extractions for their potential as sensitive indicators of the effect of land use on two important soil functions: biological activity and nutrient availability. Water-extractable organic carbon and PEOC were better correlated with C and N mineralization in the laboratory than were total and stable C, and were also more influenced by the mineralization flush that occurs at the beginning of the wet season. However, the more stable fraction also seemed to contribute to the pool of mineralizable C and N and was, within 5 years, significantly affected by changes in land use. Extraction of labile soil organic carbon with water and permanganate is an easy and valuable screening method for comparing the short-term effects of land-use systems on biological activity and nutrient availability in the soils of the Brazilian savannas.
Related Links	https://cgspace.cgiar.org/items/5da4f788-caf7-4d71-8599-631a40564199
File Format	PDF
Language	English
Publisher	International Center for Tropical Agriculture
Publisher Date	1999-01-01
Access Restriction	Open
Subject Keyword	Carbon Nitrogen Content Mineralization Oxisols Potassium Permanganate Soil Organic Matter Land Use Carbono Contenido De Nitrógeno Mineralización Oxisoles Permanganato De Potasio Materia Orgánica Del Suelo Utilización De La Tierra Soil Health Water
Content Type	Text
Resource Type	Chapter
Subject	Agronomy and Crop Science Food Science Plant Science

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