立地环境水份与气象因子对池杉木材形成与木材构造性质影响效应的研究

池杉是长江流域水网地区重要的速生用材树种，耐水湿，有一定耐旱性。池杉现实林分中，常见其水生、湿生和中生三种立地环境。目前这三种水分差异明显的立地环境间，池杉人工林材性差异及其对木材形成与木材性质影响缺乏系统性比较研究。有关其早晚材微密度差异与年龄间序列变化、木材形成规律和木材细胞壁发育过程超微结构特征尚无人研究。本项目选择水生、湿生和中生三种立地环境中池杉人工林为研究材料，比较三种立地环境间池杉人工林生长状况、木材材性差异，分析池杉木材解剖特征与木材物理力学性能间关系，构建其年轮内早晚材微密度梯度差异模型及序列年轮早晚材微密度与气候因子间关系，分析温度与降雨量对池杉形成层活动规律和木材形成的影响，表征其管胞壁发育过程变化与结构特点，总结其材性变异规律、分析水分立地环境与气象因子对池杉人工林木材形成与木材性质影响效应，评价其木材品质与有效利用途径，为其人工林培育与加工利用提供科学依据。

The Taxodium ascendens is an important fast-growing timber species in the water network area of the Yangtze River. It has moisture resistance and certain drought resistance. It is common to find the aquatic, wetland and terrestrial ground environments in the reality of Taxodium stands. There is no systematic comparative study on the differences of wood properties and the effects of environment on the wood formation and wood properties of these three kinds of site environment. And researches about the differences in microdensities between early and late wood,the changes in age sequence, the regulations of wood formation, the development process of wood cell wall, as well as the ultrastructure characteristics of wood have not been studied. In this project, the aquatic, wetland and terrestrial Taxodium ascendens plantations will be selected as the research materials, comparing the differences of the growth status and wood properties among the three sites, analyzing the relationship between the anatomical characteristics and the physical and mechanical properties of the wood, building the difference model of microdensities gradient in the early and late wood of a ring, and the regression.relationship between the microdensities and climatic factors in the early and late wood of the series rings, and the relationship between wood properties, and the relationship between the wood properties and climate factors, analyzing of the influences of temperature and rainfall on the cambium activity regulations and wood formation of Taxodium ascendens, characterizing the changes and structural characteristics of the cell wall development process, summarizing the laws of wood properties variation, analyzing the effects o f flood and meteorological factors on the wood formation and timber properties of the Taxodium ascendens plantation, evaluating its wood quality and effective utilization, providing scientific basis for the cultivation and utilization of its plantations.