The effect of fungicidal components in wood has been known for ages, yet there is no method to assess the impact of such components on the durability of a wood species, as compared to other material characteristics that influence decay. In this paper, the importance of fungicidal effects on the natural durability of 10 wood species is assessed in relation to other decay-influencing factors with a new test, the so-called ‘paste test’. By comparing results from this test with the ‘mini-block test’, on both heartwood and leached sapwood, insight is gained into the significance of fungicidal components on the one hand and other material characteristics on the other hand. The durability of species such as Prunus avium was attributed mainly to fungicidal components. For species such as Pterocarpus soyauxii, durability seemed to be an effect of both fungicidal components and moisture-regulating components, while the latter seemed to be of main importance in regulating the decay of Aucoumea klaineana and Entandrophragma cylindricum. Wood-anatomical features, such as the parenchyma content (in case of brown rot fungi) and the vessel-fiber ratio, possibly affect degradation as well. This work shows that fungicidal components are not always of major importance for the durability of a wood species. The authors hereby emphasize the importance of moisture-regulating components and wood anatomy on the durability of wood.

中文翻译：

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解开木材的天然耐久性：揭示除杀菌成分以外的腐烂影响特性的影响

木材中杀菌成分的作用早已为人所知，但与影响腐烂的其他材料特性相比，尚无方法来评估此类成分对木材种类耐久性的影响。在本文中，通过一种新的测试，即所谓的“糊状测试”，评估了杀菌作用对 10 种木材的自然耐久性的重要性，并与其他影响腐烂的因素相关。通过将此测试的结果与“小块测试”的结果进行比较，在心材和浸出的边材上，一方面可以深入了解杀菌成分的重要性，另一方面可以深入了解其他材料特性。Prunus avium 等物种的耐久性主要归因于杀菌成分。对于 Pterocarpus soyauxii 等物种，持久性似乎是杀菌成分和水分调节成分的作用，而后者似乎在调节 Aucoumea klaineana 和 Entandropphragma cylindricum 的腐烂中起主要作用。木材解剖特征，例如薄壁组织含量（在褐腐真菌的情况下）和血管纤维比率，也可能影响降解。这项工作表明，杀菌成分对于木材品种的耐久性并不总是很重要。作者在此强调水分调节成分和木材解剖结构对木材耐久性的重要性。例如薄壁组织含量（在褐腐真菌的情况下）和血管纤维比率，也可能影响降解。这项工作表明，杀菌成分对于木材品种的耐久性并不总是很重要。作者在此强调水分调节成分和木材解剖结构对木材耐久性的重要性。例如薄壁组织含量（在褐腐真菌的情况下）和血管纤维比率，也可能影响降解。这项工作表明，杀菌成分对于木材品种的耐久性并不总是很重要。作者在此强调水分调节成分和木材解剖结构对木材耐久性的重要性。