论文部分内容阅读
在资源调查的基础上选择样地 ,采用样方调查法研究红豆杉种群高度结构 ,结果表明南方红豆杉种群是通过茎干萌生幼苗 (构件 )来延续和扩大的 ,其结构为塔型 ,存活曲线为中间微凸而近于直线 ,是稳定型种群结构。幼苗幼树级占 95.3% ,其次为高度 9.1～ 11m的成年树级 ,占 1.6 %。为了扩大和延续 ,南方红豆杉种群通过大量萌生 (繁殖 )构件并进行自我调节 ,使幼树幼苗有较高的死亡率 ;种群个体进入优势层后 ,高度生长缓慢 ,而径向生长加快 ,因此 9.1～ 11m级数量增多。种间种内竞争的结果形成南方红豆杉种群世代不同大小个体的高度结构。南方红豆杉种群高度与胸径的关系为幂函数相关关系 ,高度与年龄 (<6 0 a)的关系为线性相关关系
Based on the resource survey, the sample plots were selected and the height structure of Taxus chinensis var. Mairei population was studied by quadrat investigation. The results showed that the taxa chinensis population continued and expanded through the stem-elicited seedlings (components) The curve is slightly convex to the middle and near the straight line, which is a stable population structure. Seedling saplings accounted for 95.3%, followed by the adult 9.1 ~ 11m height tree level, accounting for 1.6%. In order to expand and extend, the populations of Taxus chinensis var. Mairei seedlings have higher mortality due to a large number of self-priming (propagation) components and self-regulation. When individuals in the population enter the dominant layer, they grow highly slowly and grow radially, 9.1 ~ 11m increase in the number of class. The result of interspecific intraspecific competition is the formation of highly structured individuals of different sizes in the populations of Taxus chinensis. The relationship between the height of Taxus chinensis var. Mairei and DBH is power function, and the relationship between height and age (<60 a) is linear