安徽农业科学

[目的]了解沙生植物在干旱条件下的适应性，为其大面积人工栽培、育种提供理论依据，同时为榆林沙区相关造林及管理工作提供科学支撑。[方法]选取陕西省神木市石圪台地区7种常见固沙植物，测定其相对电导率、叶绿素(a、b及总量)、抗氧化系统、膜脂过氧化物和渗透调节物质等相关生理指标，采用主成分分析法对7种植物的适应性进行综合评价。[结果]7种固沙植物在相对电导率、叶绿素a、叶绿素b、叶绿素总量、抗氧化系统、膜脂过氧化物和渗透调节物质等生理指标上均存在显著差异；叶绿素a和叶绿素b含量对主成分因子的贡献率较大，是影响榆林沙区植物生长的重要生理指标；7种植物适应性表现为紫穗槐>文冠果>柠条>蒙古莸>沙棘>沙柳>沙地柏。[结论]紫穗槐对榆林沙区环境的适应能力较强，是该区域造林种植的理想选择。

[Objective]To investigate the adaptability of psammophyte under drought conditions, providing theoretical basis for their large-scale artificial cultivation and breeding, and offering scientific support for related afforestation and management work in the sandy areas of Yulin.[Method]Seven common sand-fixing plants in Shigetai area, Shenmu City, Shaanxi Province were selected.Their relative electrical conductivity, chlorophyll(a, b and total),antioxidant system, lipid hydroperoxide and osmotic adjustment substances were measured.The adaptability of the seven plants was comprehensively evaluated by principal component analysis.[Result] There were significant differences among the seven sand-fixing plants in terms of relative electrical conductivity, chlorophyll a, chlorophyll b, total chlorophyll, antioxidant system, lipid hydroperoxide and osmotic adjustment substances.The contents of chlorophyll a and chlorophyll b had a greater contribution rate to the principal component factors and were important physiological indicators affecting the growth of plants in the sandy areas of Yulin. The adaptability ranking of the seven plants was Amorpha fruticosa>Xanthoceras sorbifolium>Caragana korshinskii>Elsholtzia splendens>Hippophae rhamnoides>Salix psammophila>Sabina vulgaris.[Conclusion]Amorpha fruticosa has a strong adaptability to the environment in the sandy areas of Yulin and is an ideal choice for afforestation in this region.