Abstract
Prescribed fire is a common site preparation practice in forest management in southern China. However, the effect of fire on soil properties and N transformations is still poorly understood in this region. In this study, soil properties and N transformations in burned and unburned site of two vegetation types (Eucalyptus plantation and shrubland) were compared in rainy and dry seasons after 2 years’ prescribed fire. Soil pH and soil NH4-N were all higher in the burned site compared to the unburned control. Furthermore, burned sites had 30–40 % lower of soil total phosphorus than conspecific unburned sites. There was no difference in soil organic matter, total N, soil exchangeable cations, available P or NO3-N. Nitrogen mineralization rate of 0–5 cm soil in the unburned site ranged from 8.24 to 11.6 mg N kg−1 soil month−1 in the rainy season, compared to a lower level of 4.82–5.25 mg N kg−1 soil month−1 in the burned sites. In contrast, 0–5 cm layer nitrification rate was overall 2.47 mg N kg−1 soil month−1 in the rainy season, and was not significantly affected by burning. The reduced understory vegetation coverage after burning may be responsible for the higher soil NH4-N in the burned site. This study highlights that a better understanding the effect of prescribed burning on soil nutrients cycling would provide a critical foundation for management decision and be beneficial to afforestation in southern China.
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This study was funded by National Basic Research Program of China (2011CB403200), National Natural Science Foundation of China (30870442), NSFC-Guangdong Joint Project (U1131001), Guangdong Natural Science Foundation (S2011040005712), the Knowledge Innovation Program of the Chinese Academy of Sciences (KSCX2-EW-J-28) and the “Strategic Priority Research Program—Climate Change: Carbon Budget and Related Issues” of the Chinese Academy of Sciences (XDA05070307), and Guangdong Forestry Innovation Project (2012KJCX013-02) .
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Faming Wang and Jian Li contributed equally to this paper.
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Wang, F., Li, J., Zou, B. et al. Effect of Prescribed Fire on Soil Properties and N Transformation in Two Vegetation Types in South China. Environmental Management 51, 1164–1173 (2013). https://doi.org/10.1007/s00267-013-0044-6
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DOI: https://doi.org/10.1007/s00267-013-0044-6