ORGANIC FRACTION OF AGGREGATES AND STABILITY OF A dystrophic Typic UNDER DIFFERENT USES

  • Débora Menani Heid
  • Antonio Carlos Tadeu Vitorino
  • Carolina Tirloni
  • Nilda Tiyoko Kobayzshi Hoffmann

Abstract

The aim of this study is to evaluate the relationship between carbon fractions and aggregate stability of an Oxisol under different uses, using two methods of evaluation. The experiment was a factorial 3 x 3; three systems in use: tillage (10 years); grazing Brachiaria decumbens (ten years) and kills in three depths: 0-5, 5-10 and 10-20cm with five replications. For the determination of organic fractions, we used the physical particle size fractionation. The aggregate stability in forest and pasture was higher compared to tillage. There were differences between the methodologies used to determine the stability of aggregates for all attributes tested. Significant interaction between management and depth to the COT (MOT) and the levels of C (MOM). Significant correlations were obtained between all carbon fractions and evaluated the attributes related to aggregation in the adapted standard methodology. In methodology, the COT (MOT) and carbon from organic matter mineral (MOM) showed significant correlation for all indicators of stability. However, the carbon of particulate organic matter (MOP) showed no correlation with these soil properties.

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Published
2011-03-23
Issue
Vol 51 No 1 (2009): RCA
Section
Scientific Articles

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