喀斯特地貌黔竹种群结构分析

Analysis on Population Structure of Dendrocalamus tsiangii in Karst Physiognomy

从黔竹同生群、种群两个方面初步研究喀斯特地貌黔竹种群生态结构及主要生物学特性。通过选择不同生境、干扰条件下无性系种群,测定其各同生群立竹密度、径级、树高等,研究其结构类型特点、合理性与生境、人为干扰关系以及生态学特性。结果表明:阴坡生长状况优于阳坡,半遮蔽优于全光照;种群年龄-株数结构以各同生群1龄竹>2龄竹>3龄竹>4龄和4龄以上竹最为稳定合理,表明了采取科学有效的措施,调控优化各龄级采伐量,加强抚育管理,具有积极意义。

The population ecologic structure and main biology characteristic of Dendrocalamus tsiangii in Karst physiognomy were studied preliminarily on two aspects of consortive group and population. The characters of bamboo density, diameter grade, bamboo height, etc. of different consortive groups were determined to analyze the traits of structure types, rationality and habitat, jamming relation and biology characteristic through selecting clone population under different habitat and disturb conditions. Results showed that the growth of the bamboo in hidden slope excelled that in sunny slope; half shading excelled whole sunlight. The consortive group Ⅰ〉Ⅱ〉Ⅲ〉Ⅳ should be stable and rational for population age-population structure, in which, Ⅰ, Ⅱ, Ⅲ denoted 1, 2, 3 age of bamboo and IV denoted above 4 age of bamboo. It was showed that it was important to adopt scientific and effective measures, regulate and optimize the cutting amount of Dendrocalamus tsian.gii in different ages and strengthen wood tending management.