三峡库区三种林下地被物储水特性  

Water storage characteristics of ground covers under three forests in Three Gorges Area

作　　者：程金花[1] 张洪江[1] 史玉虎[2] 程云[1] 祁生林[1] 何凡[1] 潘磊[2] 

机构地区：[1]北京林业大学资源与环境学院,北京100083 [2]湖北省林业科学研究院,武汉430075

出　　处：《应用生态学报》2003年第11期1825-1828,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金资助项目 (4 0 1710 14 )

摘　　要：通过对三峡库区 3种森林类型 (松栎混交林、栓皮栎纯林、马尾松纯林 )林下地被物调查及其持水试验 ,分别得到 3种森林类型林下地被物最大储水量、吸水速率等水文特征参数 .结果表明 ,栓皮栎纯林林下苔藓层储水量最大 ,为其风干重的 30 3.1% ,松栎混交林林下的为 2 83.8% ,马尾松纯林林下的为2 4 2 .3% .松栎混交林林下枯落物最大储水量为其风干重的 2 82 .2 % ,栓皮栎纯林林下的为 2 6 2 .5 % ,马尾松纯林林下的为 2 39.3% .经分析拟合 ,得到林下苔藓层、林下枯落物吸水速率与浸泡时间之间关系式为S =ktn.在同为中龄林条件下 ,3种森林类型林下苔藓层储水量均高于林下枯落物储水量 。Through water holding experiments and the survey of ground covers under three forests (mixed forest of Quercus variabilis and Pinus massoniana, pure Quercus variabilis forest and pure Pinus massoniana forest) in Three Gorges Area, the hydrological characteristic parameters,e.g.,maximum water holding capacity and water absorption speed, were measured.The results showed that the maximum water holding capacity of moss under pure Quercus variabilis forest is the highest (303.1 % of its dry weight), that under mixed forest of Quercus variabilis and Pinus massoniana was 283.8 %,and that under pure Pinus massoniana forest was 242.3 %.The maximum water holding capacity of litter under mixed forest stand of Quercus variabils and Pinus massoniana was 282.2 % of its dry weight, that under pure Quercus variabilis forest is 262.5 %, that under pure Pinus massoniana forest was 239.3 %.The equation between water absorption speed of ground cover and its immersed period could be S=kt n.The results also showed that when the forests were all in mid-age, the water holding ability of the mosses was higher than that of the litters under the same forest.The ground cover's variation with its immersed period had no relation to forest types.

关 键 词：三峡库区 地被物 苔藓 枯落物 储水特性 

分 类 号：S715.3[农业科学—林学]