【摘要】 进行了煤矸石上种植接菌牧草及加覆盖物种植牧草的盆栽和小区试验 .结果表明 ,接菌种植可以显著提高植物的固氮酶活性和结瘤率、改善煤矸石的氮素贫瘠状况 ,促进牧草根系和地上部分的生长和煤矸石的进一步风化 ;这些结果在施氮量中等区w (N) =15 g/10 0kg更为明显 .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 .这些结果为解决煤矸石复垦中氮素缺乏的问题提供了有效途径 .表 3参 4更多还原

【Abstract】 The approaches of nitrogen accumulation were studied in pots and plots planted with inoculated forage grasses on coal gangue and on covered coal gangue. The results showed that using inoculated plantation, the activity of N-fixing enzyme and the rate of forming root nodules greatly increased, which improved N content, promoted the growth of grazing and accelerated the efflorescence of coal gangue. This effect was more significant in the treatment of the moderate application of nitrogen 〔w(N)=15 g/100 kg coal gangue〕. 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. These two approaches were effective for solving the shortage of nitrogen in planting on coal gangue. Tab 3, Ref 4更多还原