湿地松在沙化土地恢复中的对策

湿地松是一种适合沙化土地生态系统重建的先锋植物。因其耐旱、耐贫瘠和固沙能力强等特性被在沙地广泛引种。通过对其生态学特性以及在沙化土地中的适应性的分析,认为外来物种风险、单一物种造林、病虫害威胁、菌根缺乏等问题是制约湿地松在沙化土地恢复中的主要因素,提出了沙化土地湿地松恢复对策：（1）进行生态学引种试验和风险评价;（2）进行群落调控,避免物种单一化;（3）加强科学管理,防治病虫害;（4）接种菌根菌剂,促进湿地松生长。

The Problems and Countermeasures of Pinus elliottii in Sandy Vegetation Restoration

Pinus elliottii had been found as pioneer plant suitable for sandy land ecosystem reconstruction.It had been widely naturalized in sandy land owning to the feature of drought resistance,adapted to poor nutrients environment and the strong sand-fixing capacity.Through the analysis of the Bio-ecological Characteristics and biological adaptation for sandy land of P.elliottii,there are some problem exist in the risk of exotic species invasion,the harmful of single-species planting,the threat of plant disease and insect pest,the lack of mycorrhiza,etc.Those problems are major factors of limiting P.elliottii used in sandy land recovery.Propose the countermeasure of P.elliottii used in sandy land：（1）Introduction on the ecological cultivate experiment and risk assessment;（2）Control community structure and avoid single-species;（3）Strengthen the scientific management and control plant diseases and insect pests;（4）Inoculate mycorrhiza into P.elliottii and accelerate the growth of it.