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Effects of long-term coal gangue dumping on soil chemical environment and microbial community in an abandoned mine
Land Degradation & Development ( IF 3.6 ) Pub Date : 2024-08-23 , DOI: 10.1002/ldr.5267 Meiqi Yin 1 , Wenyi Sheng 1 , Xiya Zhang 1 , Yiming Wu 1 , Xiangyan Ma 1 , Zhaojie Cui 2 , Huaizhi Bo 3 , Guodong Zheng 3 , Lele Liu 1 , Weihua Guo 1
Land Degradation & Development ( IF 3.6 ) Pub Date : 2024-08-23 , DOI: 10.1002/ldr.5267 Meiqi Yin 1 , Wenyi Sheng 1 , Xiya Zhang 1 , Yiming Wu 1 , Xiangyan Ma 1 , Zhaojie Cui 2 , Huaizhi Bo 3 , Guodong Zheng 3 , Lele Liu 1 , Weihua Guo 1
Affiliation
Coal gangue hill, a significant anthropogenic interference, can cause various forms of land degradation. The promoting effect of coal gangue on soil qualities has also been discovered. However, few studies investigated the soil properties and microbiome of prolonged gangue hills. Here, we investigated soil microbial communities and chemical properties in a vegetated gangue hill and adjacent cropland and wasteland (regarded as gangue-free lands). We did not find any significant differences in the content of organic matter, total nitrogen, and total phosphorus between the gangue hill and the cropland (Kruskal–Wallis test, p > 0.05). The content of all metals we investigated (Pb, Ni, Sb, Fe, and Al) did not exceed the risk control values (GB 15618-2018; GB 36600-2018). The content of Fe and soil electrical conductivity of the gangue hill was significantly higher than the gangue-free lands (about 2 times and 20 times, respectively), which were also the key factors shaping microbial communities (Mantel's test, p < 0.05). There were no significant differences in the composition of the bacterial communities between the gangue hill and gangue-free lands. The random-forest model identified four species belonging to Actinobacteria and Ascomycota as the unique species in the gangue hill. Functional annotation revealed that the significant differences between the two land types were in bacterial nutrition types, fungal saprophytic types, and nitrogen cycling. Our study provided a theoretical foundation for land management and sustainable utilization in abandoned mining areas.
中文翻译:
废弃矿山长期倾倒煤矸石对土壤化学环境及微生物群落的影响
煤矸石山是一种重要的人为干扰,可导致各种形式的土地退化。煤矸石对土壤质量的促进作用也已被发现。然而,很少有研究调查延长的脉石山的土壤特性和微生物组。在这里,我们研究了植被脉石山和相邻农田和荒地(被认为是无脉石的土地)中的土壤微生物群落和化学性质。我们没有发现脉石山和农田之间有机质、总氮和总磷的含量有任何显著差异(Kruskal-Wallis 检验,p > 0.05)。我们调查的所有金属(Pb、Ni、Sb、Fe 和 Al)的含量均未超过风险控制值(GB 15618-2018;GB 36600-2018)。脉石山的铁含量和土壤电导率显著高于无脉石的土地(分别约为 2 倍和 20 倍),这也是塑造微生物群落的关键因素 (Mantel 检验,p < 0.05)。脉石山和无脉石地之间的细菌群落组成没有显著差异。随机森林模型确定了属于放线菌门和子囊菌门的 4 个物种作为脉石山中的独特物种。功能注释显示,两种土地类型在细菌营养类型、真菌腐生类型和氮循环方面存在显著差异。本研究为废弃矿区的土地管理和可持续利用提供了理论基础。
更新日期:2024-08-23
中文翻译:
废弃矿山长期倾倒煤矸石对土壤化学环境及微生物群落的影响
煤矸石山是一种重要的人为干扰,可导致各种形式的土地退化。煤矸石对土壤质量的促进作用也已被发现。然而,很少有研究调查延长的脉石山的土壤特性和微生物组。在这里,我们研究了植被脉石山和相邻农田和荒地(被认为是无脉石的土地)中的土壤微生物群落和化学性质。我们没有发现脉石山和农田之间有机质、总氮和总磷的含量有任何显著差异(Kruskal-Wallis 检验,p > 0.05)。我们调查的所有金属(Pb、Ni、Sb、Fe 和 Al)的含量均未超过风险控制值(GB 15618-2018;GB 36600-2018)。脉石山的铁含量和土壤电导率显著高于无脉石的土地(分别约为 2 倍和 20 倍),这也是塑造微生物群落的关键因素 (Mantel 检验,p < 0.05)。脉石山和无脉石地之间的细菌群落组成没有显著差异。随机森林模型确定了属于放线菌门和子囊菌门的 4 个物种作为脉石山中的独特物种。功能注释显示,两种土地类型在细菌营养类型、真菌腐生类型和氮循环方面存在显著差异。本研究为废弃矿区的土地管理和可持续利用提供了理论基础。