东北林业大学学报2026，Vol.54Issue(3)：65-72,8.
黄河流域陕北矿区植被恢复年限对土壤重金属污染、养分及酶活性的影响
The Effects of Vegetation Restoration Duration on Soil Heavy Metal Pollution,Nutrients and Enzyme Activities in the Northern Shaanxi Mining Area of the Yellow River Basin
摘要
Abstract
To explore the effects of vegetation restoration duration on soil heavy metal pollution,nutrients,and enzyme activities in the mining area of the Yellow River Basin,this study took the Yuheng Mining Area in Northern Shaanxi as the research object,and selected restoration plots of Caragana korshinskii and Medicago sativa.Plots were set up according to restora-tion durations(0,2,5,and 8 years).The variations in soil heavy metal contents,nutrient characteristics,and enzyme activities under different vegetation restoration durations were analyzed,and their interaction mechanisms were discussed by combining with redundancy analysis.The results showed that 8-year vegetation restoration significantly reduced soil heavy metal contents.In the soil layer of 0＜h≤ 20 cm,the contents of lead(Pb),chromium(Cr),copper(Cu),and zinc(Zn)in the 8-year vegetation restoration plots decreased by 11.5％,14.6％,18.2％,and 15.3％respectively compared with those in the bare land.The content of cadmium(Cd)showed a dynamic trend of first increasing and then decreasing with the extension of restoration duration.Vegetation restoration significantly improved soil nutrient levels.In the 0＜h≤20 cm soil layer,the contents of soil organic matter,total nitrogen,available potassium,and available phosphorus in the 8-year vegetation restoration plots increased by 73.8％,29.8％,34.2％,and 28.5％respectively compared with those in the bare land,with an obvious surface enrichment effect.Soil enzyme activities were significantly enhanced with the increase of restoration duration.The activities of invertase,alkaline phosphatase,and urease reached the maximum in the 8-year veg-etation restoration plots,which were 51.2％-62.5％higher than those in the bare land.At this stage,the activities of the three enzymes were extremely significantly positively correlated with ammonium nitrogen and available phosphorus,and ex-tremely significantly negatively correlated with zinc content.Redundancy analysis showed that soil ammonium nitrogen,zinc content,and copper content were the main factors affecting enzyme activities.Vegetation restoration could synergisti-cally promote the restoration of soil ecological functions by improving soil nutrients and reducing heavy metal pollution.关键词
黄河流域/矿区生态修复/植被恢复年限/重金属污染/土壤养分/土壤酶活性Key words
Yellow River Basin/Mining area ecological restoration/Vegetation restoration duration/Heavy metal pollution/Soil nutrients/Soil enzyme activity分类
农业科技引用本文复制引用
冯颖俊,冯毅涛,马宏铝..黄河流域陕北矿区植被恢复年限对土壤重金属污染、养分及酶活性的影响[J].东北林业大学学报,2026,54(3):65-72,8.基金项目
国家自然科学基金项目(52004086) （52004086）
2022年河南省职业教育教学改革研究与实践项目(豫教[2023]02995). （豫教[2023]02995）
