The importance of non-carbonate mineral weathering as a soil formation mechanism within a karst weathering profile in the SPECTRA Critical Zone Observatory, Guizhou Province, China
The importance of non-carbonate mineral weathering as a soil formation mechanism within a karst weathering profile in the SPECTRA Critical Zone Observatory, Guizhou Province, China
复制标题
DOI：
10.1007/s11631-017-0237-4
复制
发表时间：
2017-09
期刊：
影响因子：
1.6
通讯作者：
O. Moore;H. Buss;S. Green;Man Liu;Zhaoliang Song
中科院分区：
文献类型：
--
作者：
O. Moore;H. Buss;S. Green;Man Liu;Zhaoliang Song
中国喀斯特地区的土壤退化，包括石漠化，十分严重。由于碳酸盐岩营养贫乏且容易侵蚀，喀斯特景观对土壤退化特别敏感。了解土壤形成和土壤侵蚀之间的平衡对于土壤的长期可持续性至关重要，但对喀斯特地形的初始土壤形成过程知之甚少。在这里，我们研究了初始风化过程中的几种类型的碳酸盐岩基岩含有不同量的非碳酸盐矿物的SPECTRA临界带天文台，贵州省，中国西南部。我们比较了基岩的风化机制，这些岩石上开发的土壤剖面中的矿物质营养物质的质量转移，发现土壤的形成和养分含量强烈依赖于更富含硅酸盐的基岩（泥灰岩）的互层的风化。还检测到来自灰尘的大气输入。
Soil degradation, including rocky desertification, of the karst regions in China is severe. Karst landscapes are especially sensitive to soil degradation as carbonate rocks are nutrient-poor and easily eroded. Understanding the balance between soil formation and soil erosion is critical for long-term soil sustainability, yet little is known about the initial soil forming processes on karst terrain. Herein we examine the initial weathering processes of several types of carbonate bedrock containing varying amounts of non-carbonate minerals in the SPECTRA Critical Zone Observatory, Guizhou Province, Southwest China. We compared the weathering mechanisms of the bedrock to the mass transfer of mineral nutrients in a soil profile developed on these rocks and found that soil formation and nutrient contents are strongly dependent upon the weathering of interbedded layers of more silicate-rich bedrock (marls). Atmospheric inputs from dust were also detected.