| 基于Meta分析的煤矿区植被恢复对土壤有机碳储量的影响 |
| 摘要点击 733 全文点击 136 投稿时间：2023-05-17 修订日期：2023-06-07 |
| 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 煤矿区 植被恢复 土壤有机碳储量 土壤特性 森林 草地 农田 灌木林 |
| 英文关键词 coal mine vegetation restoration soil organic carbon stocks soil properties woodland grassland cropland shrubland |
|
| 中文摘要 |
| 煤矿开采是全世界应对不断增加的能源需求的主要手段.但随着煤矿开采，区域生态系统遭到不同程度的破坏，导致“碳汇”能力下降.植被恢复是矿区退化的生态系统和固碳功能恢复的基础.然而，目前尚未对全球范围内煤矿区植被恢复对土壤有机碳（SOC）的影响进行系统研究，因此无法准确预测全球SOC库对植被恢复的响应.通过搜集同行评议的112篇文章中植被恢复的土壤理化性质，以评估煤矿区植被恢复类型、土壤深度、恢复年份、年均温、年降水量和海拔等对SOC的影响，并明确相关的关键驱动因素.结果表明，受损煤矿区通过植被恢复能够显著改善土壤的理化性质，植被恢复后土壤相较于未恢复或自然恢复SOC储量提升了39.02%.当不考虑环境因素时，利于SOC储量积累的植被恢复类型为：农田>林地>草地>灌木林.4种类型的植被恢复对表层（0~20 cm）SOC储量均得到显著增加，草地和灌木能显著增加深层（>40 cm）的SOC储量，而林地和农田类型下深层的SOC储量与未恢复或自然恢复后的SOC储量无显著差异.植被恢复后SOC储量的增加趋势会随着土壤深度的增加而降低.具体的植被恢复策略应根据气候条件选择合适的植被类型.受损煤矿区在年均温<0℃和年均降水<500 mm的环境下，固碳效应较高的植被恢复类型为草地和灌木林，而在年均温>15℃和年降水量>800 mm的环境下，林地和农田恢复类型能够更好地增加SOC储量.TN、BD、AN和AK是影响土壤固碳能力的主要因素.研究可为量化受损煤矿区不同植被恢复措施的固碳效果和退化生态系统的恢复与重建提供理论参考. |
| 英文摘要 |
| Coal mining is the world's primary means of coping with an increasing energy demand. However, with the mining of coal, the regional ecosystem has been damaged to varying degrees, resulting in a decrease in the "carbon sink" capacity. Vegetation restoration is the basis for the restoration of degraded ecosystems and carbon sequestration functions in mining areas. However, no systematic studies have been conducted on the effects of vegetation restoration on soil organic carbon in coal mining areas on a global scale. Therefore, it is not possible to accurately predict the response of the global SOC pool to vegetation restoration. In this study, soil physicochemical properties of vegetation restoration were collected from 112 peer-reviewed articles to assess the effects of vegetation restoration type, soil depth, restoration year, mean annual temperature, annual precipitation, and elevation on soil organic carbon in coal mining areas and to identify relevant key drivers. The results showed that the damaged coal mine area could significantly improve the physicochemical properties of the soil through vegetation restoration. The restored soils had 39.02% higher SOC reserves compared to that in unrestored or naturally restored soils. When environmental factors were not considered, the vegetation restoration types that were favorable for SOC stock accumulation were cropland > woodland > grassland > shrubland. All four types of vegetation restoration significantly increased the SOC storage in the surface layer (0-20 cm). Grassland and shrubs significantly increased SOC storage at depth (>40 cm), whereas SOC storage at depth under woodland and farmland types was not significantly different from SOC storage after unrestored or natural restoration. The increasing trend of SOC storage after vegetation restoration decreased with increasing soil depth. The specific vegetation restoration strategy should select the appropriate vegetation type according to the climatic conditions. The types of vegetation restoration with higher carbon sequestration effects in damaged coal mining areas with mean annual temperature <0℃ and mean annual precipitation <500 mm were grassland or shrubland. In contrast, woodland and cropland restoration types could better increase SOC storage in environments with mean annual temperature >15℃ and annual precipitation >800 mm. TN, BD, AN, and AK were the main factors influencing the ability to affect soil carbon sequestration. This study can provide a theoretical reference for quantifying the carbon sequestration effects of different vegetation restoration measures in damaged coal mining areas and the restoration and reconstruction of degraded ecosystems. |
|
|
|
