中文摘要：

2012年8-9月对内蒙古准格尔旗黑岱沟露天煤矿排土场乔木、乔木＋灌木、乔木＋草本（禾本科）、乔木＋草本（豆科）和撂荒地5种人工植被配置条件下生物土壤结皮（BSCs）盖度和厚度进行了调查。结果表明：不同植被配置条件下BSCs的总盖度均超过了50％，乔木和乔木＋草本（豆科）配置条件下藓类结皮的盖度最高，分别为56％和43％，显著高于其他配置条件下藓类结皮的盖度；乔木＋草本（禾本科）配置条件下藓类结皮的盖度最高（34％），显著高于其他配置条件下藓类结皮的盖度。不同植被配置条件下BSCs的厚度均超过了0．30cm，其中乔木＋灌木配置条件下的BSCs厚度最高为0．55cm，显著高于其他配置条件下BSCs厚度。露天煤矿排土场进行植被恢复有助于BSCs的拓殖和发育，植被配置类型和植被盖度显著影响BSCs的盖度和厚度。

英文摘要：

During August to September of 2012, a survey on coverage and thickness of biological soil crusts （BSCs） was carried on a dumping site in the open pit coal mine of Heidaigou in Inner Mongolia. Fifteen woody plots with a size of 10 m - 10 m, 45 herbage plots with a size of 1.0 m - 1.0 m and 150 biological soil crusts plots with a size of 0.2 m - 0.2 m were set under five re- vegetation types of arbor, arbor ＋ shrub, arbor ＋ herbage （Gramineae）, arbor ＋ herbage （Legw- minosae） and abandoned farmland. The results showed that the total coverage of BSCs was more than 50% under each of the five re-vegetation types. The algae crust coverage under arbor and arbor ＋ herbage （Leguminosae） re-vegetations was 56% and 43%, respectively, being higher than under other re-vegetation types. The moss crust coverage under arbor ＋ herbage （Gramine- ae） re-vegetation was 34%, being higher than under other re-vegetation types. The thickness of BSCs under arbor ＋ shrub re-vegetation was 0.55 cm, being higher than under other re-vegeta- tion types. Vegetation restoration is beneficial to BSCs colonizing and growth at the dumping site of the open pit coal mine, and re-vegetation types and vegetation coverage significantly influence BSCs coverage and thickness.