Abstract
Microbial indices and their spatial patterns are strongly affected by environmental factors. Spatial variability of soil properties is one of the most important causes of variability in soil microbial indices. This research was conducted in the Caspian forest to assess spatial variabilities and frequency distributions of microbial properties. Ninety soil samples were taken using a grid sampling design 40 × 40 m. Microbial indices, organic carbon, nitrogen and pH were determined. Soil variable distributions showed that microbial indices had abnormal distributions. Logarithmic transformation produced normal distribution. Spatial continuity using geostatistical (variogram) was studied and maps obtained by point kriging. The variograms revealed the presence of spatial autocorrelation. The results indicate that spatial dependence of soil microbial indices was affected by non-intrinsic factors and forest management procedures. The maps show that soil microbial indices and soil properties have spatial variability. The spatial pattern of microbial indices was correlated to organic carbon and nitrogen.
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We specially thanks the Iran National Science Foundation (INFS) which provided financial support through various steps of our research.
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Corresponding editor: Chai Ruihai.
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Ghorbanzadeh, N., Salehi, A., Pourbabaei, H. et al. Spatial variability of soil microbial indices in common alder COMMON ALDER (Alnus glutinosa) stands using a geostatistical approach in northern Iran. J. For. Res. 30, 679–688 (2019). https://doi.org/10.1007/s11676-018-0651-4
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DOI: https://doi.org/10.1007/s11676-018-0651-4