[1]陈鹏宇,范金花,孙守琴*.川西贡嘎山林下地被层截留特征:枯落物、苔藓及其混合体的比较研究[J].山地学报,2025,(4):518-529.[doi:10.16089/j.cnki.1008-2786.000909]
　CHEN Pengyu,FAN Jinhua,SUN Shouqin*.Rainfall Interception Characteristics of Understory Layer in the Gongga Mountain, Western Sichuan: A Comparative Study on Litter, Moss, and Their Mixtures[J].Mountain Research,2025,(4):518-529.[doi:10.16089/j.cnki.1008-2786.000909]
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川西贡嘎山林下地被层截留特征:枯落物、苔藓及其混合体的比较研究()

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2025年第4期
页码:
518-529
栏目:
山地环境
出版日期:
2025-08-20

文章信息/Info

Title:
Rainfall Interception Characteristics of Understory Layer in the Gongga Mountain, Western Sichuan: A Comparative Study on Litter, Moss, and Their Mixtures
文章编号:
1008-2786-(2025)4-518-12
作者:
陈鹏宇; 范金花; 孙守琴*
(四川大学 a.山区河流保护与治理全国重点实验室; b.水利水电学院,成都 610065)
Author(s):
CHEN Pengyu; FAN Jinhua; SUN Shouqin*
(a. State Key Laboratory of Hydraulics and Mountain River Engineering; b. College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China)
关键词:
贡嘎山;  亚高山森林;  地被层;  苔藓;  枯落物;  人工模拟降雨;  截留
Keywords:
the Gongga Mountain;  subalpine forest;  understory layer;  moss;  litter;  artificial simulated rainfall;  rainfall interception
分类号:
S715-3
DOI:
10.16089/j.cnki.1008-2786.000909
文献标志码:
A
摘要:
林下地被层的降雨截留功能,在森林水文循环过程发挥关键作用。既有研究多针对单一枯落物/苔藓开展,难以真实反映地被层整体的截留特性。本研究以川西贡嘎山暗针叶林和阔叶林地被层(枯落物层、苔藓层、苔枯层〈苔藓-枯落物复合层〉)为研究对象,通过人工模拟降雨实验,比较不同地被类型的截留量,并探讨影响其截留能力的主要因素。结果表明,(1)枯落物和苔枯层的截留过程可分为快速湿润、缓慢增长和饱和稳定三个阶段; 苔藓层的截留分为快速湿润和缓慢增长两个阶段。坡度越大,地被层达到饱和所需时间越长。(2)降雨后期,苔枯层和枯落物层的截留速率逐渐减小至零,而苔藓层在2～5 h内保持相对恒定的低速率。苔枯层在短期内具有较强的拦截降雨能力,苔藓在长历时降雨中表现出更大的截留潜力。(3)除苔藓层外,各类地被层的最大截留量Cmax由大到小依次为苔枯层、针叶枯落物层、阔叶枯落物层。所有地被层Cmax(最大截留量)均与雨强呈正相关,与坡度呈负相关。相同雨强和坡度条件下,针叶林地被层的Cmax可达阔叶林地被层的4.2～5.4倍,苔枯层Cmax约为针叶枯落物的1.3倍。(4)雨强与暗针叶林枯落物及苔枯层Cmax的相关性最强(P<0.01),坡度与苔藓层和阔叶林枯落物Cmax的相关性最强(P<0.01)。蓄积量是影响贡嘎山地被层截留能力的关键因子,其次是坡度。(5)基于上述发现,建议在森林经营实践中根据林分类型与地形条件制定差异化的枯落物蓄积量管理策略,优化地被物组成,以最大化其生态水文效益。本研究可为理解亚高山森林水文过程提供数据支撑,并为长江上游水源涵养管理提供参考。
Abstract:
Rainfall interception by understory layer plays a key role in forest hydrological cycles. Previous studies mostly paid attention to understory litter or moss separately, making it difficult to reflect the overall rain interception performance of an understory layer.
In this study it investigated the performances of rainfall interception by understory layers(litter layer/moss layer/moss-litter composite layer)in both dark coniferous and broadleaf forests in the Gongga Mountain, western Sichuan, China. Through artificial simulated rainfall experiments, it compared the interception capacities of different understory layer types and explored the associated influencing factors.
(1)It found that the interception processes of both litter and moss-litter layers exhibited three stages: rapid wetting, low wetting, and saturation stage, whereas moss layers showed two stages,lacking the saturation stage. Steeper slopes prolonged the time to saturation.
(2)In the late period of rainfall, interception rates of moss-litter composite layer and litter layer gradually decreased to zero, whereas moss layers maintained a relatively constant low rate over 2-5 hours. Moss-litter layers demonstrated strong short-term interception capacity, while moss layers exhibited greater potential during prolonged rainfall.
(3)Excluding moss layers, maximum interception capacity(Cmax)followed the order: moss-litter layer > coniferous litter > broadleaf litter. All Cmax values correlated positively with rainfall intensity and negatively with slope. Under the same rainfall intensity and slope conditions, Cmax in coniferous forests reached 4.2-5.4 times that of broadleaf forests, with moss-litter layers showing 1.3 times that of coniferous litter alone.
(4)Rainfall intensity strongly correlated with Cmax in dark coniferous litter and moss-litter layers(P<0.01), while slope showed the strongest correlation with Cmax in moss and broadleaf litter(P<0.01). Floor mass(the stock volume of understory layer)was the key factor affecting interception capacity, followed by slope.
(5)These findings suggest in forest management practice, differentiated understory layer management strategies should be tailored to forest types and terrain, to optimize understory composition and maximize eco-hydrological benefits.
This study provides critical data for understanding subalpine forest hydrological processes and informs water conservation management in the upper Yangtze River Basin.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2025- 04-20; 改回日期(Accepted date): 2025- 08-22
基金项目(Foundation item): 国家自然科学基金(42273081)。[National Natural Science Foundation of China(42273081)]
作者简介(Biography): 陈鹏宇(2004-),男,本科生,主要研究方向:生态水文。[CHEN Pengyu(2004-),male,B.S.candidate,research on eco-hydrology] E-mail: chenpengyu7@stu.scu.edu.cn
*通讯作者(Corresponding author): 孙守琴(1980-),女,博士,教授,主要研究方向:生态水文。[SUN Shouqin(1980-),female, Ph.D., professor,research on eco-hydrology] E-mail: shouqinsun@scu.edu.cn
更新日期/Last Update: 2025-08-20