秦岭北坡不同林龄栓皮栎种子雨与种子库动态

Dynamics of Seed Rain and Seed Bank of Quercus variabilis Bl. at Different Age Level in North Slope of Qinling Mountains

[目的]研究秦岭北坡不同林龄栓皮栎(Quercus variabilisBl.)种子雨和种子库动态。[方法]对秦岭北坡林龄分别为61、140、202年的栓皮栎种群的种子雨和种子库进行研究。[结果]栓皮栎种子雨开始于8月底,9月中旬达到高峰期,并持续到10月中旬。不同林龄栓皮栎种子雨高峰期略有差异。种子雨中包括3种类型的种子:完好种子、败育种子和虫蛀种子,其中所占比例最大的是虫蛀种子(56.8%),其次为败育种子(24.3%)。高峰期种子雨平均强度为16.8棵/m2。虫害和动物取食是种子库损失的主要途径。[结论]该研究可为栓皮栎林的经营、天然更新及人工培育提供理论指导。

[Objective] The research aimed to study dynamics of seed rain and seed bank of Quercus variabilis Bl.at different age level in north slope of Qinling Mountains.[Method] The seed rain and seed bank of 61,140 and 202 years Quercus variabilis Bl.forests in north slope of Qinling Mountains were studied.[Result] Seed rain of Quercus variabilis Bl.started in the end of August,peaked in mid-September and ceased in mid-October.The high stage of seed rain had a little difference among different year-old Quercus variabilis Bl.seed.There were three types of seed in the seed rain：viable seed,immature seed,and seed infected by larvae.Seed infected by larvar took up the most percentage of the whole（56.8%）,the second was immature seed（24.3%）.The average intensity of seed rain in high stage was 16.8 seed per square meters..Predation and infection were the two major ways of seed bank loss.[Conclusion] The study can provide theoretical guidance for management,natural renovation and artificial cultivation of Quercus variabilis Bl.Forests.