Effects of slash-and-burn management on soil aggregate organic C and N in a tropical deciduous forest

Effects of slash-and-burn management on soil aggregate organic C and N in a tropical deciduous... Our study examined the effect of slash-and-burn management on the distribution of soil organic carbon (SOC) across water-stable aggregate size fractions. Macroaggregates (>250 μm) are an important source of SOC and soil organic nitrogen in forest soil: they account for approximately 80% of the total C and N content. Slashing and burning did not destroy macroaggregates, but the SOC associated with macroaggregates decreased by 32% due to combustion during burning. Fire also disrupted soil aggregate stabilization by changing the chemical nature of SOC. The largest changes were noted after the first growing season following fire: macroaggregates and associated C decreased 50% while microaggregates increased by the same proportion. The changes in organic C observed after the first growing season can be attributed to macroaggregate instability. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geoderma Elsevier

Effects of slash-and-burn management on soil aggregate organic C and N in a tropical deciduous forest

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Publisher
Elsevier
Copyright
Copyright © 1999 Elsevier Science B.V.
ISSN
0016-7061
eISSN
1872-6259
D.O.I.
10.1016/S0016-7061(98)00063-9
Publisher site
See Article on Publisher Site

Abstract

Our study examined the effect of slash-and-burn management on the distribution of soil organic carbon (SOC) across water-stable aggregate size fractions. Macroaggregates (>250 μm) are an important source of SOC and soil organic nitrogen in forest soil: they account for approximately 80% of the total C and N content. Slashing and burning did not destroy macroaggregates, but the SOC associated with macroaggregates decreased by 32% due to combustion during burning. Fire also disrupted soil aggregate stabilization by changing the chemical nature of SOC. The largest changes were noted after the first growing season following fire: macroaggregates and associated C decreased 50% while microaggregates increased by the same proportion. The changes in organic C observed after the first growing season can be attributed to macroaggregate instability.

Journal

GeodermaElsevier

Published: Feb 1, 1999

References

  • Forest-to-pasture conversion influences on soil organic carbon dynamics in a tropical deciduous forest
    Garcı́a-Oliva, F.; Casar, I.; Morales, P.; Maass, J.M.
  • Microbial biomass associated with water-stable aggregates in forest, savanna and cropland soils of a seasonally dry tropical region India
    Singh, S.; Singh, J.S.

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