色季拉山阔叶林凋落物持水特性研究  

Water-holding Characteristics of Litters in Broad-leaved Forests in the Sejila Mountain

作　　者：李菊[1] 卢杰[1] 

机构地区：[1]西藏大学农牧学院,林芝860000

出　　处：《四川林勘设计》2014年第4期23-26,53,共5页Sichuan Forestry Exploration and Design

基　　金：国家科技支撑计划重点项目(2013BAC04B01);西藏林芝森林生态系统定位研究(2012-LYPT-DW-016)

摘　　要：对西藏色季拉山川滇高山栎（Quercus aquifolioides）、山杨（Populus davidiana）、糙皮桦（Betula platyphylla）、薄毛海绵杜鹃（Rhododendron aganniphum）、高山柳（Salix cupularis）5种阔叶林凋落物持水特性进行了研究。结果表明：各阔叶林的凋落物储量范围在2240t/hm2~11040 t/hm2,排序为：川滇高山栎〉山杨〉糙皮桦〉薄毛海绵杜鹃〉高山柳;最大持水量表现为：山杨〉糙皮桦〉川滇高山栎〉薄毛海绵杜鹃〉高山柳;最大持水率为：高山柳〉糙皮桦〉薄毛海绵杜鹃〉山杨〉川滇高山栎,凋落物持水量、持水率与浸泡时间关系呈对数方程变化。凋落物吸水速率顺序为：高山柳〉糙皮桦〉薄毛海绵杜鹃〉山杨〉川滇高山栎,吸水速率与浸泡时间关系呈幂函数方程变化。This paper studied the water-holding characteristics of litters in such five broad - leaved forests as Quercus aquifolioides, Populus davidiana, Betula platyphylla,Rhododendron aganniphum and Salix cupularis in the Sejila Mountain of Tibet. The results showed that the total storage capacity of litters of each broad- leaved forest ranged from 2240 t/hm2 to 11040 t/hm2 and the order was Quereus aquifolioides 〉 Populus davidiana 〉 Betula platyphylla 〉 Rhododendron aganniphum 〉 Salix cupularis. The maximum water - holding capacity of litter was Populus da- vidiana 〉 Betula platyphylla 〉 Quercus aquifolioides 〉 Rhododendron aganniphum 〉 Salix cupularis. The maximum proportional water-holding capacity of litter was Salix cupularis 〉 Betula platyphyUa 〉 Rhododendron aganniphum 〉 Populus davidi- ana 〉 Quercus aquifolioides. The water-holding capacity and the proportional water- holding capacity of litters were changed with the soaking time in the logarithmic equation form. The water absorption rate of litter was Salix cupularis 〉 Betula platyphylla 〉 Rhododendron aganniphum 〉 Populus davidiana 〉 Quercus aquifo- lioides, and the water absorption rate was changed with soaking time in power equa- tion form.

关 键 词：阔叶林 凋落物 持水特性 色季拉山 

分 类 号：S152.71[农业科学—土壤学]