吉林蛟河不同龄组红松阔叶混交林土壤理化性质分析

摘要

The survey sampling and quantitative analysis method were used to analyze the physical and chemical properties of soil in korean pine and broad-leaved forests at different age groups ( middle-aged forest, near-mature forest, mature forest, and over mature forest) in Forest Farm of Jiaohe Management Bureau, Jilin Province.The results showed that soil bulk density did not change significantly with the development of succession, water holding capacity, litter layer thickness and soil respiration rate showed an upward trend, and total soil porosity essentially unchanged.With regard to the soil chemical properties in nutrients for the forests at different age group, there were significant differences with complex trends.In general, the trends were consistent with that of the organic mat-ter.After a comprehensive comparison of the physicochemical properties, it is concluded that with the succession moving forward, soil fertility status was improved, and the forest soil fertility of old growth forest was the best.In addition, soil and water conservation function was enhanced with the increasing age, and the forest were playing an very important role in maintaining the surrounding ecosystems.%采用调查取样和定量分析方法对吉林省蛟河市林业实验区管理局林场的不同龄组红松阔叶混交林（中龄林、近熟林、成熟林和过熟林）土壤的理化性质进行分析。结果表明：随着林龄增加，土壤容重变化并不显著；持水量、凋落物层的厚度以及土壤呼吸速率呈现上升的趋势，土壤总孔隙度基本保持不变。不同龄组的土壤在营养元素等化学性质方面，都存在明显的差异，变化趋势复杂，总体上与有机质变化一致。随着林龄增加，土壤肥力状况变好，过熟林土壤肥力最好，并且林地土壤涵养水源和保持水土功能有所加强，对维持周围生态系统有重要作用。