不同林龄落叶松人工林土壤水文特性差异  

Study on the Difference of Soil Hydrology Characteristic of Different-aged Larix gmelinii Plantations

作　　者：辛颖[1] 赵雨森[1] 张睿彬[1] 邱本军[1] 任艳丽[1] 

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《森林工程》2013年第5期1-4,共4页Forest Engineering

基　　金：国家自然科学基金(31070629);中央高校基本科研业务费专项资金项目(DL09BA29);黑龙江省教育厅科学技术研究项目(11553033);东北林业大学大学生创新训练计划项目(111202250012)

摘　　要：为了解落叶松人工林林龄对土壤水文特性的影响,对黑龙江省东部山地不同林龄落叶松人工林土壤的水分物理性质、入渗性能及贮水能力进行研究,研究结果如下:不同林龄的落叶松人工林土壤密度表现为随着深度的加深而逐渐加大的趋势,土壤孔隙状况则表现出相反的趋势。50 a的落叶松人工林土壤密度较小、孔隙度较大。各林龄的落叶松人工林土壤饱和持水量变化幅度在186.78～193.81 mm之间,土壤的饱和持水量和毛管持水量随着土壤深度的增加而不断下降。4种林龄落叶松人工林土壤初渗速率的变化范围为0.03～0.63 mm/min,50 a的落叶松人工林土壤初渗速率最大。不同林龄间的变化规律与土壤非毛管孔隙度的变化规律基本一致。50 a的落叶松人工林的土壤稳渗速度大,稳渗系数大,孔隙度大,渗透性能比较好,从而持水量也较大。In order to know the impact of different-aged Larix gmelinii plantations on soil hydrology characteristic at eastern mountainous region in Heilongjiang province,the soil physical properties,soil water storage capacity,and permeability had been studied.The results showed that： the soil bulk density of four types of Larix gmelinii plantations increased with the increase of soil depth,but the soil porosity condition decreased.The soil bulk density of 50-year-old Larix gmelinii plantation was smaller,and the soil porosity condition was bigger than other Larix gmelinii plantations.Within the range of 40cm soil depth,the volume of saturated water was between 186.78mm and 193.81 mm.With the increase of soil depth,the soil saturated water and capillary water decreased.The volume of soil infiltration rate was between 0.03 mm/min and 0.63 mm/min.The soil infiltration rate and soil saturated water of 50-yearold Larix gmelinii plantation was the largest.The variations among different ages and different porosity show the same trend.Within the 50-year-old Larix gmelinii plantation,both of the soil steady infiltration rate and the soil porosity are large,which has shown good infiltration and large water capacity.

关 键 词：落叶松人工林 土壤 水文特性 

分 类 号：S714[农业科学—林学]