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活立木腐朽造成大量木材资源损失.研究活立木腐朽与立地生境之间的关系,对于科学合理地营林管理、减少木材资源损失有着积极的指导意义.2011年5月,使用阻抗仪对小兴安岭林区红松阔叶混交林中15株成熟龄的红松活立木树干根部腐朽状况及胸径进行了检测,同时分别在活立木根部、坡上距根部5 m和坡下距根部5 m处采集土样,测定土壤的含水率、容重、总孔隙度、pH值和有机质含量,并建立了活立木树干根部腐朽程度与其胸径和各样点土壤理化指标的回归方程.结果表明:成熟龄红松活立木树干根部腐朽程度与根部土壤5项理化指标有较强的相关性(R=0.687),且与土壤含水率呈显著正相关(R=0.507),而与坡上和坡下距根部5 m土壤各理化特性指标的相关性不显著.土壤含水率降至18.4%以下时将有助于降低树干根部的腐朽程度.成熟龄红松活立木树干根部腐朽程度与树龄的相关性不显著.
Living wood decay caused a lot of wood resource loss.Studying the relationship between decaying living wood and habitat, for scientific and rational management of forest management, reduce the loss of wood resources has a positive guiding significance.In May 2011, the use of impedance meter Xiaoxing’anling The decay and root diameter of 15 mature stands of Pinus koraiensis seedlings in the mixed forest of Pinus koraiensis and broad-leaved mixed forest were measured. At the same time, , The soil moisture content, bulk density, total porosity, pH value and organic matter content were determined, and the regression equations of the decay degree of rootstocks and their DBH and soil physical and chemical indexes were established.The results showed that: There was a strong correlation between root rot of Trichosanthes roots and five physical and chemical indexes of root soil (R = 0.687) and a significant positive correlation with soil water content (R = 0.507) Soil physical and chemical characteristics of the index is not significant.When the soil moisture content dropped below 18.4% will help to reduce the degree of decay of the roots of the trunk.Reduce the root of mature Pinus koraiensis trunk decay degree and age Correlation is not significant.