[1]陈甲瑞,王小兰.色季拉山东坡不同海拔两种针叶林下苔藓层持水特性[J].森林与环境学报,2019,39(06):593-600.[doi:10.13324/j.cnki.jfcf.2019.06.005]
 CHEN Jiarui,WANG Xiaolan.Water-holding capacity of bryophyte in two coniferous forests at different altitudes in eastern slope of Mountain Shergyla, Tibet[J].,2019,39(06):593-600.[doi:10.13324/j.cnki.jfcf.2019.06.005]
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色季拉山东坡不同海拔两种针叶林下苔藓层持水特性()
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《森林与环境学报》[ISSN:2096-0018/CN:35-1327/S]

卷:
39
期数:
2019年06期
页码:
593-600
栏目:
出版日期:
2019-11-15

文章信息/Info

Title:
Water-holding capacity of bryophyte in two coniferous forests at different altitudes in eastern slope of Mountain Shergyla, Tibet
作者:
陈甲瑞1 王小兰2
1. 西藏农牧学院高原生态研究所, 西藏 林芝 860000;
2. 西藏农牧学院资源与环境学院, 西藏 林芝 860000
Author(s):
CHEN Jiarui1 WANG Xiaolan2
1. Institute of Tibet Plateau Ecology, Tibet Agricultural and Animal Husbandry University, Nyingchi, Xizang 860000, China;
2. Resources and Environment College, Tibet Agricultural and Animal Husbandry University, Nyingchi, Xizang 860000, China
关键词:
苔藓持水特性海拔梯度色季拉山
Keywords:
bryophytewater-holding characteristicsaltitude gradientMountain Shergyla
分类号:
S157
DOI:
10.13324/j.cnki.jfcf.2019.06.005
摘要:
为了解西藏色季拉山东坡典型林分下苔藓的水土保持、水文涵养作用,采用野外调查与室内浸水法,对色季拉山不同海拔高山松(2 500、2 700、2 900、3 100 m)和急尖长苞冷杉(3 800、3 900、4 000、4 100 m)群落林下苔藓的持水特性进行了研究。结果表明:(1)高山松林苔藓贮量为1.02 t·hm-2,最大持水率为281.75%,最大持水量为8.69 t·hm-2;急尖长苞冷杉林苔藓贮量为13.37 t·hm-2,最大持水率为483.74%,最大持水量为67.35 t·hm-2,显著高于高山松林(P<0.05)。(2)不同海拔高山松林苔藓层贮量和持水性能差异不显著(P>0.05);而不同海拔急尖长苞冷杉林苔藓层贮量和持水量差异显著(P<0.05),且随着海拔的上升而逐渐下降。(3)两种林型苔藓层的持水量随浸泡时间的变化规律基本一致。持水量(W)与浸泡时间(t)呈对数函数关系W=alnt+bR2>0.7。(4)苔藓层在浸泡0.25 h内吸水速率最大,0.25 h之后急剧下降,2 h左右时下降速度明显减缓。吸水速率(V)与浸泡时间(t)之间按幂函数关系V=atb下降。急尖长苞冷杉林下苔藓的贮量、持水性能高于高山松林。两种林型不同海拔苔藓层都表现为初期快速吸水和后期缓慢吸水的特征。
Abstract:
To explore the water and soil conservation function of bryophyte in two coniferous forests at the eastern slope of Mountain Shergyla, hydrological characteristics of bryophyte in Pinus densata forest (2 500, 2 700, 2 900, 3 100 m) and Abies georgei var. smithii forest (3 800, 3 900, 4 000, 4 100 m) at different altitudes were studied by field survey and indoor immersion method. The results showed that:(1) the average storage of bryophyte was 1.02 t·hm-2, the maximal water-holding ratio was 281.75% and the maximal water-holding capacity was 8.69 t·hm-2 in P. densata stands; the average storage of bryophyte was 13.37 t·hm-2, the maximal water-holding ratio was 483.74% and the maximal water-holding capacity was 67.35 t·hm-2 in A. georgei var. smithii stands, remarkably higher than that in P. densata stands. (2) The storage and water-holding capacity of bryophyte at different altitudes in P. densata stands were not significant(P>0.05) while the storage and water-holding capacity of bryophyte at different altitudes in A. georgei var. smithii stands significantiy decreased with the altitude increasing. (3) Water-holding capacity change with immersion time was similar between two forest stands. The water-holding capacity (W) had a logarithmic function to immersion time (t), W=alnt+b,R2>0.7. (4) Water absorption rate was the highest when immersed for 0.25 h, and rapidly dropped later. The decline trend slowed down remarkably when immersion time extended to 2 h. Water absorption rate (V) decreased in a power function with immersion time (t), V=atb. The storage and hydrological ability of bryophyte in A. georgei var. smithii stands were much higher than that in P. densata forest. Bryophyte in two stands showed a character of rapid water absorption in short time, irrespective of altitude gradients.

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备注/Memo

备注/Memo:
收稿日期:2019-06-17;改回日期:2019-10-09。
基金项目:西藏自治区自然科学基金项目(XZ2017ZRG-21);西藏农牧学院林学专业卓越农林人才教育培养计划改革试点项目。
作者简介:陈甲瑞(1977-),男,讲师,硕士,从事高原森林生态研究。Email:chenjiaruijl@126.com。
通讯作者:王小兰(1982-),女,讲师,博士,从事森林培育和森林生态研究。Email:63625933@qq.com。
更新日期/Last Update: 1900-01-01