Effects of vegetation restoration on soil carbon dynamics in Karst and non-karst regions in Southwest China: a synthesis of multi-source data
Effects of vegetation restoration on soil carbon dynamics in Karst and non-karst regions in Southwest China: a synthesis of multi-source data
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DOI：
10.1007/s11104-021-05220-4
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发表时间：
2021-11
期刊：
影响因子：
4.9
通讯作者：
Xiao-cong Zhu;M. Ma;R. Tateno;Xin-Hua He;Weiting Shi
中科院分区：
文献类型：
--
作者：
Xiao-cong Zhu;M. Ma;R. Tateno;Xin-Hua He;Weiting Shi
BackgroundsA large-scale ecological restoration project was initiated in the 1990s in southwest China, which is one of the largest areas of rocky desertification globally. However, the influence and potential mechanisms of vegetation restoration on soil carbon(C) sequestration in karst and non-karst regions remains unclear.MethodsBased on field investigation and multi-source data synthesis, the mechanisms of soil C sequestration were investigated to determine the most important variables affecting the rate of soil C change (Rs) in southwest China.ResultsOur results show significant differences in soil C sequestration between karst and non-karst regions with faster and longer C sequestration occurring in karst regions. In these areas,Rswas approximately 31% higher than in non-karst soils. TheRsof shrubland, grassland and cropland sites in karst areas was significantly higher than that observed in non-karst areas. We found that temperatures were the primary factor inhibiting soil C sequestration instead of precipitation. The total effect of nitrogen (N) onRswas positive in both karst and non-karst regions.ConclusionsPhosphorus was the dominant factor limiting the use of N by vegetation in karst regions and then resulting in limitation of C sequestration. The results indicated that soil C storage may increase intermittently due to combination of karst environment and climate change in southwest China in future.
