This article presents the results from two separate studies investigating the decay of wood in ground contact using adapted versions of laboratory-based terrestrial microcosm (TMC) tests according to CEN/TS 15083-2:2005. The first study (A) sought to isolate the effect of soil water-holding capacity (WHC_soil [%]) and soil moisture content (MC_soil [%WHC_soil]) on the decay of five commercially important wood species; European beech (Fagus sylvatica), English oak heartwood (Quercus robur), Norway spruce (Picea abies), Douglas-fir heartwood (Pseudotsuga menziesii), and Scots pine sapwood (Pinus sylvestris), while keeping soil temperature (T_soil) constant. Combinations of soil mixtures with WHC_soil of 30%, 60%, and 90%, and MC_soil of 30%, 70%, and 95%WHC_soil were utilized. A general trend showed higher wood decay, measured in oven-dry mass loss (ML_wood [%]), for specimens of all species incubated in soils with WHC_soil of 60% and 90% compared to 30%. Furthermore, drier soils (MC_soil of 30 and 70%WHC_soil) showed higher ML_wood compared to wetter soils (95%WHC_soil). The second study (B) built on the first’s findings, and sought to isolate the effect of T_soil and MC_soil on the decay of European beech wood, while keeping WHC_soil constant. The study used constant incubation temperature intervals (T_soil), 5–40 °C, and alternating intervals of 10/20, 10/30, and 20/30 °C. A general trend showed drier MC_soil (60%WHC_soil), and T_soil of 20–40 °C, delivered high wood decay (ML_wood > 20%). Higher MC_soil (90%WHC_soil) and T_soil of 5–10 °C, delivered low wood decay (ML_wood < 5%). Alternating T_soil generally delivered less ML_wood compared to their mean constant T_soil counterparts (15, 20, 25 °C). The results suggest that differences in wood species and inoculum potential (WHC_soil) between sites, as well as changes in MC_soil and T_soil attributed to daily and seasonal weather patterns can influence in-ground wood decay rate.

中文翻译：

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木材与地面接触真菌的腐烂研究第1部分：保水量，水分和土壤基质温度对部分木材真菌腐烂的影响

本文介绍了根据CEN / TS 15083-2：2005进行改进的基于实验室的地面微观世界（TMC）测试的两个独立研究，研究了木材在地面接触中的腐烂。第一项研究（A）试图分离土壤持水量（WHC_土壤[％]）和土壤水分含量（MC_土壤[％WHC_土壤]）对5种重要商业木材的腐烂的影响；欧洲山毛榉（Fagus sylvatica），英国橡木心材（Quercus robur），挪威云杉（Picea abies），花旗松心材（Pseudotsuga menziesii）和苏格兰松材边材（Pinus sylvestris），同时保持土壤温度（T _Soil）恒定。与WHC土壤混合物的组合_土壤的30％，60％，90％，和MC_土壤的30％，70％，和95％WHC_土壤被利用。总的趋势是，在WHC含量分别为60％和90％的_土壤中培养的所有物种的标本，以30％为基准，以烘箱干燥质量损失（ML_木材[％]）衡量，木材腐烂率更高。此外，与潮湿的土壤（95％WHC的_土壤）相比，干燥的土壤（MC的WHC的_土壤为30％，WHC的_土壤为70％）的ML_木材含量更高。第二项研究（B）建立在第一个研究结果的基础上，力图隔离T_土的影响和MC_土壤对欧洲山毛榉木材的腐烂，同时保持WHC_土壤恒定。该研究使用恒定的孵育温度间隔（T_土），5–40°C，以及交替的间隔10 / 20、10 / 30和20/30°C。总体趋势表明，MC_土壤较干燥（WHC_土壤为60％），T_土壤为20–40°C，木材腐烂率很高（ML_木材> 20％）。较高的MC_土壤（90％WHC_土壤）和5-10°C的T_土壤，木材腐烂低（ML_木材<5％）。与平均常数T相比，交替性T_土通常提供较少的ML_木材土壤对应物（15、20、25°C）。结果表明，站点之间木材种类和接种潜力（WHC_土壤）的差异，以及由于每日和季节性天气模式引起的MC_土壤和T_土壤的变化都可能影响地下木材的腐烂率。