作　　者： ; ; ; ; ; ; ;

机构地区： 河北农业大学

出　　处： 《水土保持学报》 2011年第2期97-103,共7页

摘　　要： 对冀北山地阴坡6种不同天然林分枯落物层及土壤层进行了初步研究,结果表明：（1）枯落物总蓄积量和最大持水量的顺序一致：华北落叶松-白桦-黑桦混交林〉白桦-华北落叶松混交林〉白桦-黑桦-华北落叶松混交林〉蒙古栎-黑桦混交林〉山杨-黑桦-蒙古栎混交林〉白桦-黑桦混交林,枯落物的蓄积量为10.15~30.47 t/hm2,最大持水量的变化范围为24.33~63.57 t/hm2。华北落叶松-白桦-黑桦混交林的有效拦蓄能力最强,为48.60 t/hm2,山杨-黑桦-蒙古栎混交林的有效拦蓄能力最弱,为16.47 t/hm2;（2）未分解层枯落物与半分解层枯落物持水量与浸泡时间呈明显对数关系,吸水速率与浸泡时间呈明显幂函数关系;（3）土壤容重均值的变化范围为0.89~1.18 g/cm3,总孔隙度的变动范围为49.93%~63.08%。随着土壤厚度加深,土壤容重逐渐增大,总孔隙度逐渐减小;（4）山杨-黑桦-蒙古栎混交林有效持水能力最强,为65.43 t/hm2,华北落叶松-白桦-黑桦混交林持水能力最弱,为37.92t/hm2,土壤入渗速率与入渗时间呈明显幂函数关系,相关系数都在0.95以上。 A preliminary study of hydrological effects of litters layer and soil layer was carried out in six kinds of natural forest stands in the slope of north mountain of Hebei province.The result showed that：（1）The litter total storage capacity and the maximum water holding capacity showed this order： Larix principic-rupprechtii-B.platyphylla-B.davuricaB.platyphylla-Larix principic-rupprechtiiB.platyphylla-B.davurica-Larix principic-rupprechtiiQuercus mongolica-B.davuricaPopulus davidian-B.davurica-Quercus mongolicaB.platyphylla-B.davurica,the litter total storage capacity was about 10.15~30.47 t/hm2,the maximum water holding capacity ranged from 24.33 t/hm2 to 63.57 t/hm2.The modified interception amount of Larix principic-rupprechtii-B.platyphylla-B.davurica was the strongest to 48.60 t/hm2,Populus davidian-B.davurica-Quercus mongolica was the worst to 16.47 t/hm2.（2）Water holding capacity and soaking time of without decomposition litter and semi-decomposition litter both had visible logarithmic relationship,the relationship of absorption rate and immersion time was power function.（3）The average of soil bulk density ranged from 0.89 g/cm3 to 1.18 g/cm3,total soil porosity was about 49.93%~63.08%.With the deepening of the soil thickness,soil bulk density was increased,but total soil porosity was decreased,which pointed that the surface soil was loose.（4）The soil water-holding capacity of Populus davidian-B.davurica-Quercus mongolica was the most powerful to 65.43 t/hm2,and Larix principic-rupprechtii-B.platyphylla-B.davurica was the worst to 37.92 t/hm2,using power function of infiltration rate and infiltration fitting time,the correlation coefficient was above 0.95.

关 键 词： 冀北山地 枯落物 林地土壤 水文效应

领　　域： [农业科学]