Abstract
Aims
Our study aimed to determine whether, and to what extent, stand characteristics and topography affected spatial variations in soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) concentrations in subtropical forests.
Methods
Soil samples were taken from a Choerospondias axillaris deciduous broadleaved forest and a Lithocarpus glaber–Cyclobalanopsis glauca evergreen broadleaved forest. Spatial variations in SOC, TN and TP concentrations and the factors affecting them were investigated using geostatistical analysis and stepwise linear regression, respectively.
Results
The L. glaber–C. glauca forest exhibited higher coefficients of variation (CVs) of SOC (35 %) and TN (34 %) concentrations than the C. axillaris forest (27 % for SOC and 21 % for TN), but the CV of TP concentration in the L. glaber–C. glauca forest (17 %) was lower than that in the C. axillaris forest (24 %). Stand characteristics contributed the most to spatial variations in SOC and TP, while soil texture made the greatest contribution to variations in TN. Topography contributed the least to variations in SOC, TN and TP.
Conclusions
Stand characteristics, together with topography and soil texture, contributed to spatial variations in SOC, TN and TP concentrations. The contributions of stand characteristics differed in SOC, TN and TP due to their different cycling characteristics.
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Abbreviations
- SOC:
-
Soil organic carbon
- TN:
-
Total nitrogen
- TP:
-
Total phosphorus
- CVs:
-
Coefficients of variation
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Acknowledgments
This study was supported by the Specialized Research Fund for the Doctoral Program of Higher Education (20124321110006), the National Natural Science Foundation of China (31570447 and 31170426) and the New Century Excellent Talents Program (NCET-06-0715). We would also like to thank the staff of the administrative office of the Dashanchong Forest Farm, Changsha County, Hunan Province, China for their local support for this study.
Author contributions
Idea and study design: WX; data collection and analysis: FJ, YZ, SO, PL and XD, with support from WX and XF; manuscript writing: FJ, XW, WX and CP.
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Jiang, F., Wu, X., Xiang, W. et al. Spatial variations in soil organic carbon, nitrogen and phosphorus concentrations related to stand characteristics in subtropical areas. Plant Soil 413, 289–301 (2017). https://doi.org/10.1007/s11104-016-3101-0
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DOI: https://doi.org/10.1007/s11104-016-3101-0