农业工程学报2026，Vol.42Issue(8)：131-140,10.DOI:10.11975/j.issn.1002-6819.202507195
通过多样化菌剂与环境条件优化千枚岩人造土壤性能
Optimizing the properties of artificial phyllite soil through diverse microbial agents and environmental conditions
摘要
Abstract
Previous research on ecological restoration in mining areas has predominantly focused on restoration techniques,whereas in-depth investigations into the composition of raw materials for restoration and the assessment of multi-scale spatiotemporal restoration outcomes remain limited.Phyllite has been widely available,directly accessible,and free from heavy metal contamination.It is often required for the investigation into the sourcing of restoration materials and the ecological environment over multiple temporal and spatial scales in mining areas.Among them,the ecological restoration of mining areas can involve backfilling mine pits with artificial soil in the Qinling region.It is crucial to select the optimal soil-building materials.Conventional materials like coal gangue-a byproduct of mineral extraction-contain heavy metals to hinder ecological restoration.In this study,soil cultivation,potted plant,and wilting experiments were conducted to compare optimal conditions for the weathered phyllite artificial soil.Soil quality indices(soil bulk density,pH values,maximum water-holding capacity,and electrical conductivity)were calculated for each combination of weathered phyllite artificial soil.Optimal parameters were identified using variance analysis.Key variables were also determined to enhance the reliability of the optimal parameters.Furthermore,two-dimensional interpolation of biomass and germination rates was also carried out to validate the optimization.The results revealed that microbial inoculants significantly improved the physicochemical properties of weathered phyllite artificial soil.The optimal combination of treatment was 60g of straw composting agent(JG)for 60-day cultivation.The bulk density of artificial soil stabilized at an ideal range near 1.20g/cm3,with the moderate pH and electrical conductivity close to that of natural soil.Notably,the maximum water-holding capacity reached 50.87％,with a 37.93％increase over natural soil,indicating the superior water retention and drought resistance.Pot experiments further validated that this treatment group achieved the highest germination rate(92％)of Bermuda grass seed and high biomass levels.Field verification revealed that crop germination rates and growth conditions significantly outperformed in the plots with this artificial soil,compared with the control group.There was a consistent trend over all measured parameters.Specifically,the bulk density shared a progressive decrease over the cultivation period,eventually plateauing at the optimal 1.20 g/cm3 within the ideal range for root growth and water infiltration.The pH values stabilized between 6.5 and 7.2,which was a neutral to slightly acidic environment conducive to nutrient availability and microbial activity.Low electrical conductivity remained on the minimal salinity stress for plant development in restored sites.The maximum water-holding capacity of 50.87％was enhanced by 37.93％over the local natural soil.The key factor was reduced irrigation demands for seedling survival during dry periods.The pot experiments validated that the 92％germination rate was accompanied by seedling growth.Two-dimensional interpolation of biomass and germination showed that the 60g JG 60-day cultivation point also represented the peak performance.The finding can provide the preliminary theoretical support for the practical needs in ecological conservation,restoration,and sustainable ecosystems.The optimal artificial soil formula can also offer practical,effective,and locally sourced solutions to significantly accelerate the ecosystem recovery in the mining areas.关键词
生态修复/人造土壤/千枚岩/土壤性质/秦岭矿区Key words
ecological restoration/artificial soil/phyllite/soil properties/Qinling mining area分类
资源环境引用本文复制引用
成玉祥,霍艾迪,何加庆,黄元嘉,刘雨,彭建兵..通过多样化菌剂与环境条件优化千枚岩人造土壤性能[J].农业工程学报,2026,42(8):131-140,10.基金项目
国家自然科学基金项目(42261144749,42377158) （42261144749,42377158）
秦岭生态地质环境系统演化与灾害风险管控项目(42341101) （42341101）
国家外国专家个人类项目(H20240400) （H20240400）
