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当前位置: 首页 > 文章 > 白桦纯林和华北落叶松纯林枯落物层的水文效应-以六盘山叠叠沟小流域为例 甘肃农业大学学报 2019 (3) 93-98,107
Position: Home > Articles > 白桦纯林和华北落叶松纯林枯落物层的水文效应-以六盘山叠叠沟小流域为例 Journal of Gansu Agricultural University 2019 (3) 93-98,107

白桦纯林和华北落叶松纯林枯落物层的水文效应-以六盘山叠叠沟小流域为例

作  者：
王正安;邸利;王彦辉;余治家;周旺来;唐瑜敏
单  位：
甘肃农业大学资源与环境学院
关键词：
宁夏六盘山;白桦林;华北落叶松林;枯落物;水文效应
摘  要：
[目的]通过对宁夏六盘山叠叠沟小流域典型林分类型白桦林和华北落叶松林枯落物水文效应的研究,为深入揭示该区域森林水文效应研究提供科学依据.[方法]采用野外观测和室内浸水相结合的试验方法,得到不同森林类型下枯落物储量、持水率、有效拦蓄量等水文特征指标.[结果]白桦和华北落叶松林枯落物厚度分别为31.3、19.2 cm;枯落物蓄积量分别为10.1、7.76 t/hm~2;二者有效拦蓄量分别为20.85、13.01 t/hm~2.白桦和华北落叶松林下枯落物持水量、吸水速率与浸水时间的变化规律基本一致,枯落物持水量与浸水时间存在对数关系为y=alnt+b;而吸水速率与浸泡时间存在幂函数关系为V=kt~n;枯落物浸水吸水速率在0~2 h内最大,4~10 h内逐渐变缓,12 h后其持水量基本达到最大值.[结论]白桦林枯落物层的持水性能优于华北落叶松林枯落物层的持水性能.
作  者：
WANG Zheng-an;DI Li;WANG Yan-hui;YU Zhi-jia;ZHOU Wang-lai;TANG Yu-min;College of Resources and Environment,Gansu Agricultural University;Guyuan Branch of Ningxia Academy of Agriculture and Forestry Sciences;Key Laboratory of Forestry Ecology and Environment of State Forestry Administration,Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry;College of Science,Gansu Agricultural University;College of Water Conservancy and Hydropower,Yellow River Conservancy Technical College;
单  位：
WANG Zheng-an%DI Li%WANG Yan-hui%YU Zhi-jia%ZHOU Wang-lai%TANG Yu-min%College of Resources and Environment,Gansu Agricultural University%Guyuan Branch of Ningxia Academy of Agriculture and Forestry Sciences%Key Laboratory of Forestry Ecology and Environment of State Forestry Administration,Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry%College of Science,Gansu Agricultural University%College of Water Conservancy and Hydropower,Yellow River Conservancy Technical College
关键词：
Liupan Mountains in Ningxia;;Betula platyphylla;;Larix principis-rupprechtii;;litter;;hydrological effect
摘  要：
【Objective】 The hydrological effects of litter of typical stand types(Betula platyphylla and Larix principis-rupprechtii) were studied in the small watershed of Diediegou,Liupan Mountains in order to provide the theoretical basis and important basis for further revealing the hydrological effects of forests in this region.【Method】 Hydrological parameters including litter reserve,water holding ratio and effective interception amount under different forest types were obtained by using the combination of field observation and indoor immersion.【Result】 The result showed that the litter thickness of Betula platyphylla and Larix principis-rupprechtii forests was 31.3 and 19.2 cm,with total water holding capacity of 10.1 and 7.76 t/hm~2,respectively.The effective interception amount was 20.85 and 13.01 t/ha respectively.Two stand types showed similar water-holding capacity,water absorption rate and soaking time.The relationship of water holding capacity and soaking time could be described as y=alnt+b,and V=kt~n for the relationship between absorption rate and immersion time.The water absorption rate was the highest in the initial 0～2 hours,decreased gradually in 4～10 hours after immersion,and the water content reached the maximum water-holding capacity after 12 hours.【Conclusion】 The results showed that the water holding capacity of litter in broad-leaved birch forest was better than that in larch plantation.

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