The aftermath of surface mining is a wasteland deprived of vegetation, soil structure and biodiversity. The unearthed overburden material is nutrient deprived and can only support the growth of invasive weeds such as Lantana camera which often cause allelopathy. The aim of the study is to prepare biochar from these noxious weeds and use it as an amendment for the mine spoil reclamation. Lantana biochar (LB) was prepared and applied to mine spoil, and Zea mays L. growth on biochar amended mine spoil was monitored for three months. Biochar application in a coal mine spoil using LB is comparatively de novo approach for reclamation practitioners. LB was prepared at varying temperature (250, 350 and 450℃) and residence times (30, 45 and 60 min) and characterized. After characterization, the most recalcitrant biochar at 450℃ for 60 min was chosen for application for the study. A pot trial was conducted to study the effect of LB at 0, 5, 10, 20 and 30 g kg⁻¹ dosage on the yield of Zea mays and mine spoil properties. Significant ameliorative effects were observed with increase in organic carbon content (2.9 times), cation exchange capacity (2 times), water holding capacity (0.13 times) and decrease in bulk density (0.5 times) in the mine spoil. The seedling vigour index and germination also increased significantly (p < .05) at 30 g kg⁻¹ biochar treatment compared to control. The study concluded that LB has the potential to remediate coal mine spoils and promote re‐vegetation in degraded land.

中文翻译：

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马tana丹卡马拉生物炭对煤矿变质和玉米生长的改善作用

露天采矿的后果是荒芜的土地，没有植被，土壤结构和生物多样性。出土的覆盖层物质缺乏营养，只能支持经常引起化感作用的入侵杂草（例如马tana丹）的生长。该研究的目的是从这些有害的杂草中制备生物炭，并将其用作矿渣回收的改良剂。准备了马tana丹生物炭（LB）并将其应用于矿渣和玉米may监测了L.在经过生物炭改良的矿渣上的生长，持续了三个月。对于填海从业人员而言，使用LB在煤泥中使用生物炭是一种相对全新的方法。在不同的温度（250、350和450℃）和停留时间（30、45和60分钟）下制备LB，并进行表征。表征后，选择在450℃60分钟内最难降解的生物炭进行研究。进行了盆栽试验以研究0、5、10、20和30 g kg ^-1剂量的LB对玉米的产量的影响和矿的破坏特性。随着矿渣中有机碳含量的增加（2.9倍），阳离子交换容量（2倍），持水量（0.13倍）和堆积密度的降低（0.5倍），观察到了显着的改善作用。与对照相比， 在30 g kg ^-1生物炭处理下，幼苗活力指数和发芽率也显着提高（p <.05）。该研究得出的结论是，LB具有补救煤矿弃土和促进退化土地上植被恢复的潜力。