斑苦竹无性系种群克隆繁殖的动态与调节研究

Studies on Dynamics and Regulation of Propagative Module of Pleioblastus Maculata clone Population

本文依据了ＪＬＨａｒｐｅｒ（１９７７）的构件生物（ｍａｄｕｌａｒｏｒｇａｎｉｓｍ）种群理论，将某一特定生境内的斑苦竹竹子的集合作为一个无性系种群，研究了它的克隆繁殖构件的数量动态，以及克隆繁殖与无性系基株年龄和分株密度的关系。结果表明：斑苦竹以Ⅲ龄级基株形成的克隆繁殖构件（笋芽）数量最多，以后，随龄级的增大而逐渐减少。发笋数、退笋数和成竹数均与无性系分株密度相关，它们的最适密度都为２５×１０４株／ｈａ。退笋率和成竹率与繁殖构件的出土时间呈直线相关关系。退笋率模型：Ｄ＝２７．２５３＋０．７０２ｔ（Ｒ２＝０．６３６）成竹率模型：Ｍ＝７２．６６２－０．７０１ｔ（Ｒ２＝０．６３４）

According to the theory of J.L.Harper′s (1977) modular organism, considering the assemblage of Pleioblastus maculata in the habitat as a clone population, the dynamics of clonal propagative modules and the modules with age class genet of and density of ramets were studied in this paper. These results show as follows: The number of Propagative modules that Ⅲ age class genets produce them is the largest, after this , it is gradully falling with the increase of age class. These numbers of appeared, death and mature of bamboo shoot all are interrelated to the density of ramets in the clone population the correlation density of the largest valuws in al 2.5×10 4 bamboo modules /ha. There is line correlationship between the numbers of death and mature of bamboo shoot and time of appeared bamboo shoot, the regression models as below: model of death ratio: D=27.253+0.702t (R 2=0.636) model of mature ratio:M=72.662-0.701t (R 2=0.634)