| 黄河流域煤矿区土壤有机碳库的修复及其影响因素：基于Meta分析 |
| 摘要点击 819 全文点击 117 投稿时间：2024-01-17 修订日期：2024-05-21 |
| 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 黄河流域 煤矿区 整合分析 土壤有机碳库 生态恢复 土壤酶活性 |
| 英文关键词 Yellow River Basin coal mining area Meta-analysis soil organic carbon pool ecological restoration soil enzyme activity |
|
| 中文摘要 |
| 采煤对生态系统造成严重干扰和破坏,加剧区域碳排放. 对煤矿废弃地进行生态恢复,可改善受损土壤的理化性质,增加土壤碳库储量. 因此,煤矿区生态恢复对区域碳汇水平提升和生态环境改善具有重要意义. 目前,国内煤矿区修复方面的研究多分散在黄河流域主要产煤省份,急需从流域尺度阐明其对土壤固碳功能的影响. 以黄河流域煤矿区土壤为研究对象,通过整合分析方法,研究土壤理化性质与酶活性在植被恢复后的变化规律,并结合气候条件揭示土壤有机碳库修复的影响机制. 结果表明：①煤矿区生态恢复后,土壤理化性质与酶活性均得到显著改善,但不同土层间存在一定差异. ②矿区生态恢复使得土壤有机碳（SOC）、全氮和碱解氮分别增加62.2%、40.5%和36.0%,且随着恢复年限的增加,整体上呈现增大的趋势. 从植被恢复类型来看,乔木混交林的土壤有机碳含量增加最为显著. ③氮磷含量的增加会提升土壤肥力,有助于增加植被凋落物的土壤碳输入,从而促进土壤有机碳库的修复. 年均温、年降水量和土壤类型也是影响土壤碳库恢复的主要因子. 未来应结合黄河流域不同地域的气候和土壤特点,从碳库修复角度选择适宜的植被类型,以促进流域整体碳汇水平的提升. |
| 英文摘要 |
| Coal mining has caused notable disturbance and destruction to the ecosystem, leading to intensified regional carbon emissions. Ecological restoration of abandoned coal mines can improve the physical and chemical properties of damaged soil and increase soil carbon storage. Therefore, ecological restoration of coal mine areas is crucial for improving regional carbon sink levels and environments. Currently, most studies on ecological restoration in Chinese coal mining areas are scattered across the major coal-producing provinces in the Yellow River Basin. Its effect on soil carbon sequestration at a basin scale must be crucially elucidated. In this study, we focused on changes in soil physicochemical properties and enzyme activities after vegetation restoration using an integrated analysis method, combined with climate and soil characteristics in the Yellow River Basin’s coal mining areas to reveal the major factors affecting soil carbon restoration. Our results showed that： ① Soil physicochemical properties and enzyme activities were improved significantly after ecological restoration； however, some differences were present among different soil layers. ② Soil organic carbon （SOC）, total nitrogen, and alkali-hydrolyzed nitrogen increased by 62.2%, 40.5%, and 36.0%, respectively, showing an overall increasing trend with increasing restoration years. From the perspective of vegetation type, mixed forest had the largest increment in SOC. ③ The increase in nitrogen and phosphorus content improved soil fertility and helped to increase soil carbon input from vegetation litter, thus promoting the restoration of the soil organic carbon pool. In addition, average annual temperature and precipitation along with soil type also played important roles affecting soil C restoration. In the future, based on climate and soil characteristics of specific mining areas, suitable vegetation types should be selected from a perspective of C sequestration to enhance C sink of the whole basin. |
|
|
|
