开平区位于唐山市郊,境内煤炭资源丰富,分布在马家沟矿、荆各庄矿等国营大矿和多个中小型煤矿。经多年开采后地表遗留下相当数量的煤矸石且堆积成山,成为绿化工作的难点。我区林业技术人员经多年在荆各庄等地试验,总结出一项营造刺槐、火炬树、紫穗槐混交林,立体绿化矸石山技术。通过几年的试验,发现此法在矸石山造林,几种林木生长迅速,煤矸石风化分解加快,每年产生的落叶使土壤有机质含量大大提高,土壤得 Kaiping District is located in the outskirts of Tangshan, the territory of rich coal resources, located in Majiagou Mine, Jinggezhuang mine and other large state-owned coal mines and a number of small and medium-sized coal mines. After years of mining left behind a considerable amount of surface coal gangue and pile into the mountains, a greening difficulties. Forestry experts in our area after many years in Jingge Zhuang and other experiments, summed up to create a black locust, Rhus typhina, Amorphophallus forest, three-dimensional green Gangue Hill technology. After several years of experimentation, it was found that this method afforestation in gangue hill, rapid growth of several trees, accelerating the decomposition of coal gangue weathering, leaves produced each year greatly increased soil organic matter content, soil