摘要
本文研究了水灾迹地油松和白桦种群的更新过程。研究结果表明,油松种群大小结构模式为单峰曲线偏右分布,不存在坡向差异;白桦种群则为单峰曲线偏左分布,仅在阴坡有个体分布。油松和白桦种群的存活曲线类型不同,油松种群的存活曲线类型为Ⅱ型,而白桦种群的存活曲线类型为Ⅲ型。与白桦相比,油松种群水灾迹地的更新过程主要受立地条件的影响;与油松相比,白桦种群更新的主要影响因素为种源远近、种子萌发和幼苗建成条件。
In this paper research was made on the regeneration process of Pinus tabulaeformis and Betula platyphylla population in the inundated area. The results demonstrated that the size structure of P. tabulaeformis population was unimodal curve deflecting to the right, with no difference of slope aspect, and that of the Betula found only population was unimodal curve deflecting to the left, but some individuals were on the shady slope of the inundated area. There were different types of survival curve, type Ⅱ in the P. tabulaeformis of P. tabulaeformis pop population and type Ⅲ in the Betula platyphylla. By comparison, the regeneration ulation were mainly affected by the land condition, and that of Betula platyphylla population were influenced by the seed origination distance and seed germination and establishment condition.
出处
《四川林业科技》
2007年第1期1-5,共5页
Journal of Sichuan Forestry Science and Technology
基金
国家十五攻关项目:"中国森林生态网络体系建设攀枝花点的研究"(课题编号:2002BA516A17-19)
国家林业局生态环境与资源实验室资助
关键词
油松
白桦
种群
更新
水灾迹地
P. tabulaeformis,Betula platyphylla, Population, Regeneration, Inundated area
