Fire history influences on the spatial heterogeneity of soil nitrogen transformations in three adjacent stands in a dry tropical forest in Thailand

Muneto Hirobe, Naoko Tokuchi, Chongrak Wachrinrat, Hiroshi Takeda

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17 Citations (Scopus)

Abstract

Spatial patterns of soil nitrogen (N) transformations were examined using geostatistical analysis in three adjacent stands with different fire history (0, 10 and 35 years since the latest fire, respectively) in a dry tropical forest in Thailand. A larger pool of total inorganic N and a faster rate of N mineralization were recorded in the stand with longer fire prevention. At the spatial scale analyzed, the proportion of spatially dependent variance to the total variance of N mineralization and nitrification increased from 0.39 to 0.73, and from 0.40 to 0.77, respectively, with the time since the latest fire. The spatial autocorrelation ranges of N mineralization and nitrification decreased from ≥9.0 to 3.28 m, and ≥9.0 to 2.77 m, respectively, with the time since the latest fire. These results suggested that fire history affected not only the level of available soil N, but also the spatial heterogeneity of soil N transformations, presumably due to the difference in plant influences on soil.

Original languageEnglish
Pages (from-to)309-318
Number of pages10
JournalPlant and Soil
Volume249
Issue number2
DOIs
Publication statusPublished - Feb 1 2003
Externally publishedYes

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Keywords

  • Dry tropical forest
  • Fire
  • Geostatistics
  • Soil nitrogen transformations
  • Spatial heterogeneity

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

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