秦岭冷杉幼苗适应性的研究

通过对秦岭冷杉不同海拔、光照、苗床类型、覆土深度等条件下的野外播种试验,分析了不同条件下种子萌发、幼苗存活和幼苗生长率的差异,揭示了秦岭冷杉种子及幼苗在天然环境下的适应性.天然生境下秦岭冷杉的平均出苗率只有17.7％,不及实验室发芽率(36％)的一半.海拔、光照、苗床类型、埋藏深度对秦岭冷杉的种子萌发、幼苗存活和幼苗生长率都有不同程度的影响.生产上秦岭冷杉的复壮一定要遵循适地适树的原则.

Study on Seedling Adaptability of Abies chensiensis

Through seeding test on field condition under different of altitude,lighting,seedbed type and soil thickness,as well as seed germination and seedling survival being compared among provenances,the adaptability of Abies chensiensis seed and seedling were studied in natural environment.The results showed that in natural environment the seed germination rate of A.chensiensis was only 17.7%,which was less than half of its germination rate(36%) in laboratory.Altitude,lighting,seedbed type,soil thickness and seed provenances all had various effects on seed germination,seedling survival and growth of A.chensiensis.In practice,the rejuvenation of A.chenesiensis should follow the principle of favored tree species for suitable sites and optimal provenances be used.