【摘要】 以塞罕坝地区华北落叶松人工林为研究对象,结合该地区2009年气象资料,主要研究不同林龄华北落叶松人工林林下土壤层物理性质及水文特征。通过对幼龄林、中龄林、近熟林和林外对照样地的研究,结果表明:不同林龄华北落叶松人工林其林下土壤都具有很好的土壤结构,土壤孔隙度、持水量、涵养水源的能力都较林外强,但总体与林外对照土壤物理性质的差别不是太大;5月份是各样地类型林下土壤含水量最高的月份。随着土层深度的增加,土壤含水量逐渐减小,在土壤表层0～10cm土壤含水量最高,介于23.46%～29.81%之间;20～60cm土层,各样地类型土壤含水量降幅最大;60～100cm土壤含水量降幅变缓。近熟林土壤含水量保持水平较高,且变异系数CV最小,说明近熟林林分密度合理,其林下土壤具有很强的调蓄能力。更多还原

【Abstract】 Article in Larix principis-rupprechtii Mayr plantation in saihanba region for the study,in conjunction with the 2009 meteorological information,primary study on physical properties and hydrological characteristics of soil layer under different age forest of Larix principis-rupprechtii Mayr plantation.Through on near cooked forest,and middle-forest,and young forest,and forest outside to of research,results indicates that: The capacity of conservation water,and holding water,and soil pore degrees are more then the forest outside,the soil layer of different ages Larix principis-rupprechtii Mayr plantation is has of good soil structure,but the differences of soil physical properties is not too large compared with the forest outside control in overall;May is the highest month in soil moisture of sample plot types.As the soil layer depth increased,the soil moisture gradually reduced,the highest soil moisture in 0~10cm,between 23.46% to 29.81%;the largest decline of the soil moisture in 20~60cm;the decline more slowly in 60~100cm.Maintain high levels of soil moisture content of near-mature forest,and CV is minimum,show that regulation and storage capacity of the forest soil layer of near cooked forest is strong,and has reasonable stand density.更多还原