河北太行山干旱片麻岩山地坡面枯落物持水特性  

A study on water-holding characteristics by slope litter in drought mountainous area with gneissic basement rock in Taihang Mountain of Hebei

作　　者：孙萌[1] 张雪梅[1,2] 牛宝清 李保国[1,2] 齐国辉[1,2] 陈立晴 张彦坤[1] 

机构地区：[1]河北农业大学林学院,河北保定071000 [2]河北省核桃工程技术研究中心

出　　处：《林业科技开发》2014年第3期39-43,共5页China Forestry Science and Technology

基　　金：优质矮化早实核桃新品种选育及省力化栽培技术研究(编号:11230115D)

摘　　要：对河北太行山干旱片麻岩山地坡面枯落物特征及持水特性进行了初步研究，结果表明：不同坡位的枯落物总储量的变动范围在19．28～37．52t／hm^2，总储量大小依次是坡中部〉坡下部〉坡上部；坡面枯落物层的有效拦蓄能力及最大持水能力的趋势为坡中部〉坡下部〉坡上部，坡面中部均最强，分别为45．32、62．67t／hm^2；坡面枯落物的持水量均在前4h内不断增大，10h上升趋于平缓，24h达到饱和，枯落物的持水量与浸泡时间呈明显的对数关系，吸水速率与浸泡时间呈明显幂函数关系。A preliminary study on water-holding characteristics by slope litter layer was carried out in Taihang Mountain drought gneiss area of Hebei. The resuhs showed that, the total litter accumulation of different slope position ranged from 19.28 t/hm^2 to 37.52 t/hm^2, which was in order of middle slope 〉 lower slope 〉 upper slope. The trend of effective in- terception capability and maximum water holding capacity of litter layer was middle slope 〉 lower slope 〉 upper slope. The litter layer on middle slope was the strongest one in both interception and maximum water holding capability. Their values were 45.32 t/hm2 and 62.67 t/hm^2 , respectively. The water-holding capacity of litter increased continuously within the first 4 h, then flattened out in 10 h, and reached saturation after 24 h. There was a significantly logarithmic relationship be- tween litter water-holding capacity and immersion time, and there was a typical power function relationship between water absorption rate and immersion time.

关 键 词：河北太行山 片麻岩山地 坡面 枯落物 

分 类 号：S715[农业科学—林学]