朴树苗期种群构件研究

Study on Population Moduls in Seeding Stage of Celeltis tetrandra Roxb.ssp.Sinensis(Pers.) Y.C.Tang

[目的]为了研究朴树苗期的种群构件,掌握朴树种群结构的规律。[方法]通过调查22个构件的生长情况及生物量,依据Harper的构件理论对朴树苗期的构件种群进行了研究。[结果]朴树苗期构件生长情况及生物量增长的曲线动态图多呈传统的“S”形,符合Logistic增长,只有枝、叶生物量与数量以及叶面积等呈平放的倒“S”形;构件之间及构件与个体之间生物量增长不具同步性;1级枝叶及其上的叶系统是朴树1年生苗苗期种群构件的主要组成部分;2级枝叶及其上的叶系统是朴树2年生苗苗期种群构件的主要组成部分。[结论]该研究阐明了朴树苗期的种群构件和种群结构规律,为进一步研究朴树种群,培育及经营其林分提供了理论基础。

[Objective] The purpose of study was to research the population modules in seeding stage of Celeltis tetrandra Roxb. ssp. Sinensis （Pers.） Y.C.Tang and master the law of its population structure. [Method] The population modules were studied in seeding stage of Celeltis tetrandra Roxb. ssp. Sinensis according to Modular theory of Harper through the observation on the growth instance and biomass of 22 modules. [Result] The curve dynamic figure of the growth and biomass increase of different modules most presented traditional ＂S＂ figure, corresponding to the increase model of Logistic. Only the curves of biomass and quantity of branch and leaf and the curves of leaf area showed fiat upside-down ＂S＂ patterns. The increase of biomass between modules or between module and individual were not synchronous. First-grade branch leaf and upper （its） leaf system were the main components in the population modules in seeding stage of one-year-old seedling of Celeltis tetrandra Roxb. ssp. Sinensis. Second-grade branch leaf and upper （its） leaf system were the main components in the population modules in seeding stage of two year old seedling. [Conclusion] The study clarified the laws of population modules and population structure in seeding stage of Celeltis tetrandra Roxb. ssp. Sinensis and provided theoretical base for further research on population, breeding and forest stand management of Celeltis tetrandra Roxb. ssp. Sine ns is.