尾矿
腐殖质
土壤碳
总有机碳
环境化学
溶解有机碳
土壤水分
生态演替
植被(病理学)
有机质
碳纤维
化学
环境科学
土壤科学
生态学
复合数
病理
物理化学
生物
医学
复合材料
有机化学
材料科学
作者
Zhi Xiang Shen,Yupeng Wang,Qiang Sun,Wei Wang
出处
期刊:Pedosphere
[Elsevier]
日期:2014-04-01
卷期号:24 (2): 271-279
被引量:31
标识
DOI:10.1016/s1002-0160(14)60013-8
摘要
Carbon of humus acids (HSAC) and dissolved organic carbon (DOC) are the most active forms of soil organic carbon (SOC) and play an important role in global carbon recycling. We investigated the concentrations of HSAC, water-soluble organic carbon (WSOC), hot water-extractable organic carbon (HWOC) and SOC in soils under different vegetation types of four copper mine tailings sites with differing vegetation succession time periods in Tongling, China. The concentrations of HSAC, WSOC, HWOC and SOC increased with vegetation succession. WSOC concentration increased with the accumulation of SOC in the tailings, and a linearly positive correlation existed between the concentrations of HSAC and SOC in the tailings. However, the percentages of HSAC and DOC in the SOC decreased during vegetation succession. The rate of SOC accumulation was higher when the succession time was longer than 20 years, whereas the speeds of soil organic matter (SOM) decomposition and humification were slow, and the concentrations of HSAC and DOC increased slowly in the tailings. The percentage of carbon of humic acid (HAC) in HSAC increased with vegetation succession, and the values of humification index (HI), HAC/carbon of fulvic acid, also increased with the accumulation of HSAC and SOC in soils of the tailings sites. However, the HI value in the each of the tailings was less than 0.50. The humification rate of SOM was lower than the accumulation rate of SOM, and the level of soil fertility was still very low in the tailings even after 40 years of natural restoration.
科研通智能强力驱动
Strongly Powered by AbleSci AI