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以内蒙古霍林河南露天煤矿排土场为研究对象,分别测试了种植4a、7a、9a、12a、21a的人工沙棘林下土壤,并与未种植沙棘之外排土(复垦0a)为对照,研究了不同年限沙棘林下0~20cm、20~40cm土层中的p H值、有机质、碱解氮、速效磷、速效钾的含量及其差异。结果表明:人工沙棘林确实具有改良土壤的作用,时间越长,效果越明显,种植21a后,0~20cm土层中有机质、碱解氮、速效钾含量达到或超过周边天然草地水平,p H值与速效磷接近天然草地水平;20~40cm土层效果比0~20cm稍差,但仍有明显的效果,这说明在霍林河南露天煤矿排土场边坡生态恢复过程中,种植沙棘林恢复土壤效果较好,具有推广意义。
Taking the Huolinhe South open-pit coal mine dump in Inner Mongolia as the research object, the soil under artificial seabuckthorn planting 4a, 7a, 9a, 12a, and 21a was tested and compared with the un-seabuckthorn soil excavated (reclaimed 0a) , The contents of p H, organic matter, available nitrogen, available phosphorus and available potassium in 0-20 cm and 20-40 cm soil layers under different years of seabuckthorn were studied. The results showed that the artificial seabuckthorn forest did improve the soil effect, the longer the effect, the more obvious. After 21 days of planting, the content of organic matter, available nitrogen and available potassium in 0-20 cm soil layer reached or exceeded that of the surrounding natural grassland, p H The value and available phosphorus were close to the level of natural grassland; the effect of 20 ~ 40cm soil layer was slightly worse than that of 0 ~ 20cm, but there was still obvious effect, which indicated that the seabuckthorn forest was planted during the ecological restoration of the slope in Huolinhe open- Soil restoration is better, with the promotion of significance.