Full
Outline
In view of the scarcity of topsoil and the shortage of solid waste resources in the northwest mining area, the soil reconstruction technology based on coal gangue in the mining area was studied. The coal gangue (CG), rock and soil stripping (RS) and topsoil (TS) from a coal mine in Tongchuan, Shaanxi Province were selected as raw materials, and the reconstructed soil was mixed in different proportions to carry out the pot experiment of alfalfa. The results show that the physical and chemical properties of the reconstructed soil under different proportions were different. In general, the reconstructed soil increases the nutrient and moisture content of the soil, which is more conducive to the growth and development of alfalfa. Compared with TS, the pH of the reconstructed soil decreases, the organic matter, total nitrogen and available potassium increase, while the available phosphorus decreases. The treatment of CG 40% and RS 15% is the most favorable for the growth of alfalfa. The highest plant height of alfalfa is 54.60 cm, the longest root length is 23.20 cm, and the maximum fresh weight and dry weight are 14.814 g and 4.849 g, respectively. The above results indicate that the reconstructed soil formed by CG is feasible for the phytoremediation of mines in Northwest China, and provides a new choice for the comprehensive utilization of CG.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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