The paper presents an analysis of the influence of geographical origin and Scots pine log type on the mechanical properties of the timber sawn from them. The tested timber was sawn from logs obtained from three different forestry regions in Poland, located in the western part of the country. A batch of 150 timber pieces was obtained from each region. The cross-section had the dimensions of 40 mm × 138 mm. The timber was sawn from logs of three different types: butt, middle and top, from a fresh, mixed forest around 120 years old. The timber was dried in industrial conditions and planed four times. The values determined for the timber under research were the static modulus of elasticity in bending (MOE), and the bending strength (MOR). Moreover, timber density (DEN) was determined with the stereometric method. For all three sites, the highest average values of the tested timber properties were obtained for timber made of butt logs, and the lowest for timber made of top logs. It was concluded that the tested Scots pine properties depended on the type of log, and to limited extent, on its geographic origin. The statistical analysis revealed that the geographic origin of the logs that the tested timber was made of had a statistically significant impact on the variance of all the tested timber properties. The type of log also had a statistically significant influence on the variance of all the tested properties.

中文翻译：

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苏格兰松木原木类型（Pinus Sylvestris L.）对木材力学性能的影响

本文分析了地理起源和苏格兰松木原木类型对锯材的机械性能的影响。测试的木材是从波兰西部三个林业地区的原木上锯下的。从每个地区获得了150批木材。横截面尺寸为40 mm×138 mm。木材是用三种不同类型的原木锯成的：对接，中间和顶部，来自大约120年的新鲜混交林。木材在工业条件下干燥并计划了四次。对研究中的木材确定的值是弯曲时的静态弹性模量（MOE）和弯曲强度（MOR）。另外，通过立体法测定木材密度（DEN）。对于所有三个网站，对接原木制成的木材的测试木材性能平均值最高，对上原木制成的木材的最低。得出的结论是，测试过的苏格兰松树特性取决于原木的类型，并在一定程度上取决于原木的地理来源。统计分析表明，制成被测木材的原木的地理来源对所有被测木材性能的变化具有统计学上的显着影响。日志的类型对所有测试属性的方差也有统计学上的显着影响。统计分析表明，制成被测木材的原木的地理来源对所有被测木材性能的变化具有统计学上的显着影响。日志的类型对所有测试属性的方差也有统计上的显着影响。统计分析表明，制成被测木材的原木的地理来源对所有被测木材性能的变化具有统计学上的显着影响。日志的类型对所有测试属性的方差也有统计学上的显着影响。