Abstract
Better knowledge and comprehensive evaluation of soil quality have important implications for developing sustainable forest management practices. The objective of the present study was to establish a soil quality index (SQI) that can be used to assess soil quality under different thinning intensities in a Chinese fir (Cunninghamia lanceolata [Lamb.] Hook) plantation in southeastern China. We sampled the soil in different seasons of the year from four plots subjected to different thinning intensities: low-intensity thinning (LIT, 30%), moderate-intensity thinning (MIT, 50%), high-intensity thinning (HIT, 70%), and control (0%). We analyzed 16 physical, chemical, and biological soil properties. The SQI was calculated based on total data set (TDS) and minimum data set (MDS) using different scoring functions (linear and nonlinear), integrating procedures (additive, weighted additive, and Nemoro), and weight assignment methods (communality and variation of principal component analysis (PCA)). The SQI calculated by the nonlinear weighted additive method with variation explained by the PCA performed better than the other methods. The SQI values were in the range of 0.26–0.64 under different thinning intensities. A significant increase in the SQI values was observed in MIT (53.2%) and HIT (40.8%) compared with that in CK. The SQI values also showed strong seasonal variability, with the highest values in the summer and the lowest values in the winter. Microbial biomass nitrogen (MBN), soil organic carbon (SOC), and pH were found to be the most crucial indicators of soil quality. Our results confirmed that thinning exerts a strong effect on soil quality, and the studied SQI based on MDS was found to be an effective tool for assessing soil quality.
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27 September 2022
A Correction to this paper has been published: https://doi.org/10.1007/s10342-022-01496-y
Abbreviations
- SQI:
-
soil quality index
- MDS:
-
minimum data set
- TDS:
-
total data set
- PCA:
-
principal component analysis
- IQI:
-
integrated quality index
- AQI:
-
additive quality index
- NQI:
-
Nemoro quality index
- LS:
-
linear scoring
- NL:
-
non-linear scoring
- WC:
-
water content
- SOC:
-
soil organic carbon
- TN:
-
total nitrogen
- TP:
-
total phosphorus
- TK:
-
total potassium
- DOC:
-
dissolve organic carbon
- MBC:
-
microbial biomass carbon
- MBN:
-
microbial biomass nitrogen
- ACP:
-
acid phosphatase
- BG:
-
β-glucosidase
- DEH:
-
dehydrogenase
- POX:
-
peroxidase
- URE:
-
urease
- CK:
-
control
- LIT:
-
low-intensity thinning treatment
- MIT:
-
moderate-intensity thinning treatment
- HIT:
-
high-intensity thinning treatment
- PC:
-
principal component
- COM:
-
communality
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This study was supported by the National Natural Science Foundation of China (Grant No. 31971453).
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Ye, Y., Sun, X., Zhao, J. et al. Establishing a soil quality index to assess the effect of thinning on soil quality in a Chinese fir plantation. Eur J Forest Res 141, 999–1009 (2022). https://doi.org/10.1007/s10342-022-01471-7
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DOI: https://doi.org/10.1007/s10342-022-01471-7