人工林刨花楠木材主要特性的径向变异及其对气象因子的响应

Radical variation of main wood properties and its relationship to climatic factors of Machilus pauhoi plantation

为了给刨花楠材质预测、轮伐期选择及木材合理高效利用提供理论基础,本研究以17年生刨花楠人工林为对象,采用木材性质快速测定仪(SilviScan-3^(TM))获得木材性质参数,研究人工林刨花楠解剖特性、木材密度与弹性模量的径向变异规律及其对气象因子的响应,重点分析生长轮宽度、年龄与各材性性质参数之间的相关性.结果表明:刨花楠不同材性性状的径向变异规律不同,7～11生长轮为其变异曲线的转折点;木材密度和纤维壁腔比与生长轮宽度的相关性不显著,生长速度和生长轮年龄对大部分材性性状具有重要影响;不同气象因子对不同材性性状影响程度不尽相同,相对湿度是影响刨花楠材性的主要生态因子;各材性性状中,微纤丝角和弹性模量对气象因子的响应更敏感.

To provide a theoretical foundation for forecasting wood properties, rotation selection and efficient use of timber, wood properties of 17 year-old Machilus pauhoi plantation were examined using SilviSeanTM fast detection technology. The radical variation mode of anatomical traits, wood density, modulus of elasticity and their responses lyzed the relationship between growth ring width, to climate change were analyzed. We also ana- growth ring age and wood property parameters. The results showed that the radical variation patterns of all the wood properties were different, with 7-11th growth ring being the turning point of the variation curves. Growth ring width had no signifi- cant correlation with wood density and cell wall to cavity ratio. Growth rate and growth ring age imposed significant impacts on most wood properties. Different climatic factors had different impacts on different wood properties. Relative humidity was the main factor affecting wood properties. The responses of microfibril angle and modulus of elasticity to climate change were more sensitive than other wood properties.