The decay rate of standing Korean pine (Pinus koraiensis) in natural forests can be as high as 50% and is likely influenced by the soil properties and nutrient and water status of the site. To clarify the relationship between the severity of tree decay and soil properties in order to prevent decay in a natural mixed forest in the Xiaoxing’an Mountains, wood strength of standing trees was nondestructively assessed, and the severity of decay of extracted wood cores was quantified based on differences in mass between two decayed increment cores extracted at breast height and an intact increment core near the decayed ones. Soil samples from the critical root zone (non-rhizosphere) of each tree were analyzed for chemical properties and microbial composition. The abundance of chemical elements (especially total N and K) and the species richness of soil microbes increased as decay severity increased. Fungal number (FN) and actinomycetes number (AN) were related to decay severity (R² = 0.504). Bacterial number (BN) was higher than FN or AN, but had a minor effect on tree decay. Path analysis showed BN might indirectly inhibit decay by affecting FN. Decay severity was not significantly correlated with either soil fungal or bacterial diversity. These results suggest that forest managers need to monitor levels of fungi and total N and total K levels to reduce the decay of Korean pine.

站立的红松（红松）的衰减率）的比例可能高达50％，并且很可能受到该地区土壤特性以及养分和水分状况的影响。为了弄清树木腐烂的严重程度与土壤性质之间的关系，以防止在小兴安岭的天然混交林中腐烂，对站立树木的木材强度进行了无损评估，并对提取的木芯的腐烂程度进行了定量基于在乳房高度提取的两个衰变增量核心与衰变核心附近的完整增量核心之间的质量差异。分析了每棵树的关键根区（非根际）的土壤样品的化学性质和微生物组成。随着腐烂程度的增加，化学元素的丰度（尤其是氮和钾的总量）和土壤微生物的物种丰富度增加。R ²  ＝ 0.504）。细菌数（BN）高于FN或AN，但对树木腐烂影响较小。路径分析表明，BN可能通过影响FN间接抑制衰变。腐烂严重程度与土壤真菌或细菌多样性均无显着相关性。这些结果表明，森林经营者需要监测真菌水平以及总氮和总钾水平，以减少红松的腐烂。