| 铜尾矿坝不同恢复年限土壤理化性质和酶活性的特征 |
| 摘要点击 1532 全文点击 617 投稿时间：2017-11-03 修订日期：2018-01-04 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 恢复年限 土壤酶 土壤理化性质 生态系统 铜尾矿 |
| 英文关键词 phytoremediation years soil enzymes soil physicochemical properties ecosystem copper tailing |
|
| 中文摘要 |
| 金属矿产资源开采使尾矿坝迅速升高，矿区生态环境遭到严重破坏.土壤理化性质和酶活性是衡量生态系统功能的重要指标，可作为评价土壤恢复质量的重要因子.以山西省垣曲县十八河铜尾矿区9个尾矿子坝作为研究对象，分析不同恢复年限子坝土壤理化性质与土壤酶活性之间的关系.结果表明，不同恢复年限子坝的土壤理化性质差异较大，随着恢复年限的增加，土壤养分含量显著升高.过氧化氢酶与碳氮比显著负相关，脲酶与总氮含量和土壤含水量均显著正相关，磷酸酶和蔗糖酶与土壤理化因子之间无显著关系.土壤中铜含量随子坝恢复年限增加而逐渐累积，砷和镉含量先增加后降低，恢复后期逐渐达到稳定水平，各子坝的土壤锌含量无显著差异.为铜尾矿区的土壤生态系统恢复及退化机制的研究提供一定的生态学依据. |
| 英文摘要 |
| Mining for metal and mineral resources lead to the rapid rise of tailings dams and caused serious damage to the ecological environment of the mining area. Soil physicochemical characteristics and enzyme activities were important indexes for ecosystem functions, and they were also important factors in evaluating soil restoration qualities. We selected nine sub-dams of the Eighteen River copper tailings in Yuanqu County, and analyzed the relationship between soil physicochemical properties and soil enzyme activities. The results showed that there were great differences in soil physicochemical properties over different reclaimed years, and as the reclaimed years passed, soil nutrient contents significantly increased. There were significant negative correlations between catalase and the ratio of soil carbon and nitrogen, and urease was positively correlated to total nitrogen and soil moisture. Phosphatase and sucrose demonstrated no significant relationships with soil physicochemical factors. Copper content gradually accumulated in soil as the restoration period of sub-dams increased. Arsenic and cadmium content increased initially and then decreased before they gradually reached a stable level. In addition, there was no significant difference in zinc content among different sub-dams. Together, these results provide the ecological basis for further studies in soil ecosystem restoration and degradation mechanisms in copper tailings. |
