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同时在煤矸石上加薄层覆盖物种植豆科植物，对其氮素的积累提高和生物性状的改善同样具有明显的促进作用，并以黄土覆盖效果更佳。
By planting Legume on the thin covered gangue, especially on the loess covered coal gangue, nitrogen accumulation also increased with the improvement of the biologic characteristics.
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