坡向差异导致不同坡面近地表水、热及能量平衡过程存在较大差异，进而影响了土壤环境及高寒植物的生长。基于青藏高原花石峡冻土观测基地建设的具有八个坡向的工程实体（简称八棱台），在6年后进行现场测量和实验测试，研究了坡向对青藏高原高寒植被生长环境及特性的影响。结果表明：各坡面近地表（10 cm和30 cm深度）土壤温度由高到低为：南坡>东南坡>西南坡>西坡>东坡>西北坡>东北坡>北坡，即相对朝阳坡面（东、东南、南和西南）温度明显高于相对背阳坡面（西、西北、北和东北）温度。而0~30 cm深度的土壤含水量朝阳坡面与背阳坡面之间差异不明显。地上植被长势（包括株高、覆盖度和地上生物量）朝阳坡面优于背阳坡面；地下植被长势（包括根深和地下生物量）朝阳坡面劣于背阳坡面。0~10 cm深度土壤有机碳和全氮含量基本是朝阳坡面高于背阳坡面；全磷含量朝阳坡面小于背阳坡面；各坡面之间全钾及速效养分的差异不显著（P>0.05）。总体来看，高寒地区温度对植被生长及养分分布的影响更为显著。研究结果为不同坡向植被修复和能量平衡研究提供了参考资料。

The different aspects lead to great differences in the processes of water， heat， and energy balance， which further affect the soil environment and the growth of alpine plants. Based on an experimental study with eight aspects （abbreviated as octagonal platform） of Huashixia frozen soil observation base on the Qinghai-Tibet Plateau， the influence of aspects on soil environments and alpine vegetation growth was studied. The results showed that： （1） After 6 years， the soil temperature of each slope near the surface （10 cm and 30 cm depth） from high to low was as follows： south > southeast > southwest > west > east > northwest > northeast > north， that is， the relatively sunny slope （east， southeast， south and southwest） was higher than the relatively shady slope （west， northwest， north and northeast）. However， there was no significant difference in soil water content between the sunny slope and the shady slope at the depth of 0~30 cm. （2） The growth trend of aboveground vegetation （including plant height， coverage and aboveground biomass） on sunny slope was better than that on shady slope. The growth trend of underground vegetation （including root depth and underground biomass） on sunny slope was worse than that on shady slope. （3） In the depth of 0~10 cm， the content of soil organic carbon and total nitrogen on sunny slope was higher than that on shady slope. However， the content of total phosphorus on sunny slope was lower than that on shady slope. There was no significant difference in total potassium and available nutrients among different slopes （P>0.05）. In general， the effect of temperature on vegetation growth and nutrient distribution is significant in alpine regions， and these findings provides an important reference for vegetation restoration and energy balance research in different aspects.