Full
Outline
To improve the problem of poor soil nutrients and limited carbon sequestration capacity in the arid mining area of Northwest China, combined with field experiment and static box method, multi-source solid waste (coal gangue and sludge compost) combined with carbonate-mineralization microbe were used to improve sandy degraded soil in coal mining subsidence area. The results show that the addition of multi-source solid waste and carbonate-mineralization microbe promote the growth of alfalfa and the development of its roots, and increase the carbon and nitrogen content of alfalfa. Multi-source solid waste combined with carbonate-mineralization microbe significantly increases soil carbon and nitrogen content and soil microbial carbon and nitrogen metabolism related enzyme activities, and the improvement effect of multi-source solid waste combined with carbonate-mineralization microbe is better than that of single application of bacteria. After the addition of solid waste and carbonate-mineralization microbe, the net ecosystem exchange rate (NEE) of sandy soil decreases, and the gross primary productivity (GPP) of the ecosystem increases. The structural equation model shows that the addition of multi-source solid waste and carbonate-mineralization microbe is an important factor affecting GPP. Therefore, multi-source solid waste combined with carbonate-mineralization microbe has the application potential of improving quality and efficiency, carbon sequestration and emission reduction in soil remediation in arid mining areas in Northwest China.
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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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