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川南天然常绿阔叶林人工更新后枯落物层持水特性研究
引用本文:龚伟,胡庭兴,王景燕,宫渊波,冉华.川南天然常绿阔叶林人工更新后枯落物层持水特性研究[J].水土保持学报,2006,20(3):51-55.
作者姓名:龚伟  胡庭兴  王景燕  宫渊波  冉华
作者单位:四川农业大学,生态林业工程省级重点实验室,四川,雅安,625014
基金项目:科技部专项基金;四川省科研项目
摘    要:对川南林区天然常绿阔叶林及其人工更新成檫木林、柳杉林和水杉林后林下枯落物层蓄积量、自然含水量和持水过程进行研究。结果表明:枯落物层蓄积量天然常绿阔叶林(25.68t/hm^2)〉水杉林(18.14t/hm^2)〉檫木林(9.95t/hm^2)〉柳杉林(1.13t/hm^2)。天然常绿阔叶林枯落物层自然含水量分别是檫木林、柳杉林和水杉林的3.18倍、41.33倍和1.53倍。在整个持水过程中.前2h内各林分枯落物层持水作用较强。林下枯落物层持水量与浸泡时间之间的关系式为Q=alnt+b.吸水速率与浸水时间之间的关系式为V=kt"。枯落物层最大持水量、最大拦蓄量和有效拦蓄量均是天然常绿阔叶林〉水杉林〉檫木林〉柳杉林。因此,保护天然常绿阔叶林及其选择适宜的树种进行更新对于提高林下地表枯落物层水文生态功能具有重要的作用和意义。

关 键 词:天然常绿阔叶林  人工更新  枯落物层  持水特性
文章编号:1009-2242(2006)03-0050-05
收稿时间:2005-11-27
修稿时间:2005-11-27

Water Holding Characteristics of Litter Layer after Natural Evergreen Broadleaved Forest Artificial Regeneration in Southern Sichuan Province
GONG Wei,HU Ting-xing,WANG Jing-yan,GONG Yuan-bo,RAN Hua.Water Holding Characteristics of Litter Layer after Natural Evergreen Broadleaved Forest Artificial Regeneration in Southern Sichuan Province[J].Journal of Soil and Water Conservation,2006,20(3):51-55.
Authors:GONG Wei  HU Ting-xing  WANG Jing-yan  GONG Yuan-bo  RAN Hua
Abstract:This paper studied on the litter amount,natural water content and water holding characteristics of litter layer under the natural evergreen broadleaved forest and three artificial plantations,Sassafras tzumu,Cryptomeria fortunei and Metasequoia glyptostroboides forests,which formed by natural evergreen broadleaved forest artificial regeneration.The results showed that the amount of litter layer is natural evergreen broadleaved forest(25.68 t/hm~2)>Metasequoia glyptostroboides forest(18.14 t/hm~2)>Sassafras tzumu forest(9.95 t/hm~2)>Cryptomeria fortunei forest(1.13 t/hm~2).The natural water content of whole litter layer in natural evergreen broadleaved forest is 3.18,41.33,1.53 times of that in Sassafras tzumu,Cryptomeria fortunei and Metasequoia glyptostroboides forests,respectively.During the process of water holding of litter layer,the water holding capacity and absorption speed of the first 2 h were superior to the rest of time.The equation between the water holing capacity of the litter layer and the immerse time is Q=alnt b,the equation between the water absorption speed of the litter layer and the immerse time is V=kt~n.The maximum water holding capacity,the maximum interception and the modified interception of litter layer are natural evergreen broadleaved forest>Metasequoia glyptostroboides forest>Sassafras tzumu forest>Cryptomeria fortunei forest.Therefore,protecting natural evergreen broadleaved forest and choose appropriate afforestation tree for artificial regeneration of natural evergreen broadleaved forest were important for enhancing the eco-hydrological benefits of forest litter layer.
Keywords:natural evergreen broadleaved forest~ artificial regeneration  litter layer  water holding characteristic
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