摘要
【目的】了解祁连山区废弃矿山生态修复效果,以期为该地区废弃矿山生态修复及后续管理措施提供参考。【方法】以山丹县曹家口金矿生态修复区为例,对比分析修复区与周边原地貌土壤及植被的差别,探讨该废弃矿山整体修复效果。【结果】周边原地貌(CK)0~20 cm和20~40 cm土层土壤的有机质、速效钾、水解性氮、有效磷、总磷、全钾的含量均高于修复区,且差异显著(P<0.05);修复区土壤不同土层间除pH外,0~20 cm土层的各项土壤养分指标均显著高于20~40 cm土层土壤(P<0.05);原地貌(CK)土壤不同土层间除全氮和总磷含量外,其他养分指标均表现为20~40 cm土层略大于0~20 cm土层,差异不显著(P>0.05);原地貌植被数量、盖度、多样性指数等均高于修复区。【结论】该废弃矿山修复区生态环境仍与周边存在较大差异,需进一步完善优化修复措施。
【Objective】The study was conducted to evaluate the effectiveness of ecological restoration in the abandoned mines in Qilian Mountain area,providing the reference to the ecological restoration and subsequent management of the abandoned mines.【Method】The present study took the ecological restora‐tion of Caojiakou gold mine in Shandan County as an example,and explored the overall effectiveness of eco‐logical restoration in the abandoned mine by comparing the differences in landform soil and vegetation be‐tween the restored and the surrounding original areas.【Result】The contents of organic matter,available potassium,hydrolytic nitrogen,available phosphorus,total phosphorus,and total potassium in the soil(0~20 cm and 20~40 cm)of the surrounding original landform were significantly higher than those in the re‐stored area(P<0.05).In the restored area,all indicators of soil nutrients except for the pH in the 0~20 cm layer were significantly higher than those in the 20~40 cm layer(P<0.05).In the original landform,except for the total nitrogen and total phosphorus,all soil nutrient indexes were slightly higher in the 20~40 cm soil layer than in the 0~20 cm layer(P>0.05).The coverage and diversity index of vegetation in the origi‐nal landform were higher than those in the restored area.【Conclusion】The ecological environment in the re‐stored area of the abandoned mine still differs greatly from the surrounding original area,and thus it is nec‐essary to further improve and optimize the restoration measures.
作者
谭岷山
李欣娟
杨靖文
TAN Minshan;LI Xinjuan;YANG Jingwen(Institute of Soil and Water Conservation of Gansu Province,Lanzhou 730020,China)
出处
《甘肃农业大学学报》
CAS
CSCD
2022年第4期171-176,183,共7页
Journal of Gansu Agricultural University
基金
甘肃省水利科研课题(甘水科外发〔2018〕70-28)。
关键词
祁连山
废弃矿山
生态修复
植被状况
Qilian Mountain
abandoned mine
ecological restoration
vegetation status
