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In order to study the degradation of mica-quartz schist under the action of dry-wet cycles, which widely distributed in Shiyan, Hubei province was taken as the research object. The hydroscopicity test, wave velocity test and scanning electron microscope test were carried out on the samples under the action of dry-wet cycles, respectively, to reveal the law and mechanism of physical deterioration. The test results show that the water absorption increases greatly, the wave velocity decreases and gradually tends to be stable with the increase of the number of dry-wet cycles. Besides, the surface of the sample was gradually disseminated into reddish-brown, and the foliation was gradually cracked and connected. Finally, the flake particles became more, round and granulated, the number of cracks increased and the micro-fractures gradually expanded, so the water absorption rate increased and wave speed decreased of mica-quartz schist under the action of dry-wet cycles.
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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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