生态环境学报2024，Vol.33Issue(12)：1953-1963,11.DOI:10.16258/j.cnki.1674-5906.2024.12.013
生物炭基土壤改良剂对锑矿区土壤质量及亮叶桦生长的影响
The Amelioration of Biochar Soil Amendment on Antimony Mining Soil and Growth of Betula luminifera
摘要
Abstract
Soil amendment plays a pivotal role in improving soil quality and vegetation construction in mining areas.Biochar soil amendment(BBOF)selected as soil amendments was applied at 0%(T1),1%(T2),and 3%(T3)in soil severely contaminated by antimony(Sb)and arsenic(As),to examine the amelioration of BBOF on degraded soil from Sb mining sites,and their effect on seedling growth of Betula luminifera H.J.P.W in a pot experiment last for six months.The results demonstrated that BBOF significantly improved soil quality;in particular,the T2 treatment significantly enhanced soil water content(26.00%)and porosity(32.42%)(p<0.05).Compared to the T1 treatment,the T3 treatment exhibited a notable increase in soil pH and organic matter content by 7.74%and 31.78%,respectively(p<0.05).Soil nitrogen(N),phosphorus(P),potassium(K),and alkaline nitrogen(AN),alkaline potassium(AK),and alkaline phosphorus(AP),were increased by 38.15%,74.78%,1.41%,65.02%,336.20%,and 98.38%,respectively.The activities of urease,phosphatase,and β-glucoside significantly increased by 92.53%,41.86%,and 175.33%,respectively,under the T3 treatment(p<0.05).The T3 treatment resulted in significant increases of 26.37%,39.66%,142.00%,and 118.62%in plant height,base diameter,and aboveground and underground biomass,respectively(p<0.05).The T2 treatment led to a reduction in bioavailable and total Sb and As in the soil.The accumulation of Sb in roots,stems,and leaves was found to decrease by 73.00%,25.73%,and 4.48%,respectively,under T3 treatment.Taken together,the BBOF demonstrated positive impacts on the physicochemical properties of the soil,increased the activity of soil enzymes,reduced the biological availability of Sb and As,and facilitated the growth of Betula luminifera in antimony mining areas.The application rate of 1%was observed to have the most pronounced effect.The results provide a valuable reference for future soil improvement and vegetation restoration in S mining.关键词
土壤改良/植株生长/生物炭基土壤改良剂/重金属/锑矿区/亮叶桦/植物修复Key words
soil improvement/plant growth/biochar soil amendment/heavy metal/antimony(Sb)mining areas/Betula luminifera/phytoremediat分类
资源环境引用本文复制引用
李璞君,唐丽,赵博,邸东柳,陈岩,肖江,陈光才..生物炭基土壤改良剂对锑矿区土壤质量及亮叶桦生长的影响[J].生态环境学报,2024,33(12):1953-1963,11.基金项目
国家重点研发计划项目(2020YFC1807704) （2020YFC1807704）
