中文摘要：

研究甘南高寒草甸不同坡向植物功能性状和土壤因子及二者的关系．结果表明：禾草是阳坡的优势功能群，杂草和灌木是阴坡的优势功能群．阴坡植物群落生物量显著大于阳坡，但叶片氮磷比显著小于阳坡．不同坡向上，除叶片氮含量变化不显著外，叶片磷含量、比叶面积和物种平均高度大小均为阴坡〉偏阴坡〉阳坡．植被的生存策略在阴阳坡发生了很大变化，这种变化可以从不同坡向植物叶性状的差异和优势功能群的改变反映出来．土壤温度大小为阳坡〉偏阴坡〉阴坡；土壤含水量大小为阴坡〉偏阴坡〉阳坡；除了全磷含量自阳坡到阴坡出现递增趋势外，土壤全氮、有机质和速效氮的大小均为阴坡〉阳坡〉偏阴坡．比叶面积、物种平均高度与土壤全磷、有机质和土壤含水量均呈显著正相关，与土壤pH呈显著负相关．土壤水分和土壤pH共同影响着高寒草甸不同坡向植物功能性状和土壤养分的分布．

英文摘要：

This paper studied the plant functional traits, soil factors, and their relationships at dif- ferent slope aspects in the alpine meadow of South Gansu. On the sunny slope, grasses were the dominant functional groups; while on the shady slope, forbs and shrubs dominated. The plant community biomass was significantly higher on shady slope than on sunny slope, while the leaf N/P ratio was in adverse. The leaf phosphorus content, specific leaf area, and plant average height at different slope aspects were in the order of shady slope 〉 partial shady slope 〉 sunny slope, whereas the leaf nitrogen content on different slopes had less difference. The survival strategies of the vegetations on sunny and shady slopes had great changes, reflecting in the differences in the plant leaf traits and dominant functional groups. Soil temperature was in the order of sunny slope 〉 partial shady slope 〉 shady slope, while soil water slope 〉 sunny slope. Soil total phosphorus content was in the order of shady slope〉 partial content increased from the sunny slope to the shady shady slope, while the other soil nutrients contents showed the sequence of shady slope 〉 sunny slope 〉 partial shady slope. The specific leaf area and plant average height were significantly positively correlated to the soil organic carbon, total phosphorous, and water contents, and significantly negatively correlated to soil pH. Soil water content and soil pH co-affected the distribution patterns of plant functional traits and soil nutrients at different slope aspects of alpine meadow.