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首页> 美国政府科技报告 >Phytostabilization of Mine Tailings with Compost-Assisted Direct Planting.
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Phytostabilization of Mine Tailings with Compost-Assisted Direct Planting.

机译：用堆肥辅助直接种植对矿山尾矿进行植物稳定。

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Amending mine waste with compost is a viable and promising alternative to the expensive process of covering an entire site with a thick soil or rock cap followed by seeding, according to research from the University of Arizona Superfund Research Program (UA SRP) Center. A recent field study at the Iron King Mine and Humboldt Smelter Superfund site showed that adding amendments and seeds led to establishment of native plants and sustained growth on mine tailings over 4 years. The trial was based on successful results from preliminary greenhouse studies, which scaled effectively to the field. Mine tailings are the main waste product remaining after ore extraction. At older sites, mine tailings are often highly acidic and contaminated with various metals, which can disperse into the surrounding environment if they are not addressed. A team led by Raina Maier, Ph.D., at the UA SRP Center is investigating phytostabilization, or planting directly on mine tailings, to immobilize the metals so they cannot be spread by wind or through water erosion to nearby communities or ecosystems. In addition to acidity and metals, the arid southwestern U.S., the location of the UA SRP studies, brings the further challenge of low rainfall on establishing plants, even those that are drought-tolerant. Establishing vegetation on these sites using direct planting generally requires some kind of amendment, such as compost, to help plants grow.

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