缙云山马尾松种群生物量生殖配置研究

 对缙云山亚热带常绿阔叶林不同演替阶段马尾松(Pinus massoniana)种群生殖器官的生物量配置进行了系统研究。结果显示从蕾期、花期到果熟期,马尾松种群生殖器官的生物量配置逐渐增加,但不同演替阶段的生殖配置格局各异。马尾松纯林各生殖阶段的生殖配置分别为1.31％,7.61％,23.25％;针阔混交林各生殖阶段的生殖配置分别为0.6％,3.29％,15.14％;林缘旷地各生殖阶段的生殖配置分别为0.76％,3.78％,18.44％。一年中缙云山马尾松种群的生殖配置动态变化呈现低一渐高一高一低的规律性。缙云山马尾松种群的生殖年龄大致可分为4个时期,即幼龄生殖期、过渡生殖期、稳定生殖期和衰退生殖期。种群密度和群落透光度与其生殖配置显著相关。

REPRODUCTIVE ALLOCATION OF BIOMASS IN PINUS MASSONIANA AT MT. JINYUN

Reproductive allocation of biomass in Pinus massoniana was studied in a subtropical evergreen broad-leaved forest at Mt. Jinyun. Values of reproductive allocation increased gradually from the flower bud phase to the flower and fruit phase and the patterns of reproductive allocation of biomass differed between forest successional stages. In a pure forest stand, reproductive allocation was 1.31%, 7.61% and 23.25% at three reproductive stages respectively. In the theropencedrymion, 0.6%, 3.29% and 15.14% respectively. In the forest edge wilderness, 0.76%, 3.78% and 18.44% respectively. The dynamic law of reproductive allocation is "low→high by degree→high→low' during a year. The reproductive age of Pinus massoniana can be divided into four stages in terms of the relationship between the reproductive allocation of biomass and the age of the reproductive individuals. These are the junior, non-stable, stable and declining phases. The reproductive allocation of biomass is significantly related to population density and the light intensity of the community.