| 宁南山区华北落叶松林枯落物水文特征研究 |
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| 引用本文： | 刘建立,王彦辉,管伟,程丽莉,于澎涛,熊伟,徐丽宏.宁南山区华北落叶松林枯落物水文特征研究[J].水土保持通报,2009,29(6):20-23. |
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| 作者姓名： | 刘建立 王彦辉 管伟 程丽莉 于澎涛 熊伟 徐丽宏 |
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| 作者单位： | 刘建立,LIU Jian-li(中国林业科学研究院,森林生态环境与保护研究所,北京,100091;北京林业大学,水土保持学院,北京,100083);王彦辉,于澎涛,熊伟,徐丽宏,WANG Yan-hui,YU Peng-tao,XIONG Wei,XU Li-hong(中国林业科学研究院,森林生态环境与保护研究所,北京,100091);管伟,GUAN Wei(中国林业科学研究院,热带林业研究所,广东,广州,510520);程丽莉,CHENG Li-li(北京市农林科学院,林业果树研究所,北京,100093) |
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| 基金项目： | 国家自然科学基金，科技部科技支撑计划项目课题，中国林科院中央级公益性科研院所基本科研业务费专项资金，科技部社会公益研究项目，国家林业局森林生态环境重点实验室项目 |
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| 摘 要： | 森林枯落物层具有重要的生态水文功能,对六盘山北侧叠叠沟小流域华北落叶松林下枯落物吸水速率、释水速率和截留降雨动态变化及其影响因素进行了研究.结果表明,枯落物吸水速率与浸泡时间呈对数函数关系,释水速率与时间呈幂函数关系.枯落物饱和持水能力较强,可达到自身重量的4倍.对生长季内枯落物持水量动态变化的观测表明,当长时间无雨时,持水量显著下降;当降雨发生时,持水量迅速增加,这种动态过程随着降雨发生而不断重复.此外,由于林冠下穿透降雨分布不均匀和前期枯落物干燥,有时可出现枯落物透过雨量大于降雨量的现象.对枯落物持水量与环境因子的相关分析表明,持水量与林内降雨量呈显著正相关(P<0.01),而与林内气温、太阳辐射、风速、大气水势和饱和水汽压差呈显著负相关(P<0.01).
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| 关 键 词： | 六盘山 华北落叶松 枯落物 截留动态 环境因子 |
| 收稿时间： | 1/6/2009 12:00:00 AM |
| 修稿时间： | 2009/5/25 0:00:00 |
Hydrological Characteristics of Larix Principi-rupp rechtii Litter in the South Mountainous Area of Ningxia Hui Autonomous Region |
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| LIU Jian-li,WANG Yan-hui,GUAN Wei,CHENG Li-li,YU Peng-tao,XIONG Wei and XU Li-hong.Hydrological Characteristics of Larix Principi-rupp rechtii Litter in the South Mountainous Area of Ningxia Hui Autonomous Region[J].Bulletin of Soil and Water Conservation,2009,29(6):20-23. |
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| Authors: | LIU Jian-li WANG Yan-hui GUAN Wei CHENG Li-li YU Peng-tao XIONG Wei and XU Li-hong |
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| Institution: | Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China;College of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China;Research Institute of Tropical Forestry of CAF,Guangzhou,Guangdong 510520,China;Institute of Forestry and Pomology,Beijing Academy of Agricultural and Forestry Sciences,Beijing 100093,China;Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China;Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China;Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China |
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| Abstract: | To understand the eco-hydrological functions of litter,the water absorbing and releasing speed, the dynamics of holding water, and the effects of environmental factors on holding water were studied. A plantation of larch (Larix principi-rupprechtii) in the small watershed of Diediegou in north side of Liupan M ountains, Ningxia Hui Autonomous Region w as selected as research stands. Results show ed that the equation for water absorbing speed of litter and its immersed time was y= 38. 206lnx+ 133.38(R2=0.952 1) and the equation for water releasing speed of litter and its immersed time, y= 339.1e-0.000 3x(R2=0.880 6).The water-holding ability of the larch litter was as high as 415.97% of the dry weight. According to the observation on water dynamic process of litter across a grow thseason, the water content of litter decreased markedly in the case of no rainfall for a long time, but increased after rainfall as a result of water-absorption by litter. The drying-up and wetting dynamic process occurred continuously with raining. By correlation analysis, the water amount held in litter w as significantly and positively related with rainfall depth, but negatively related with temperature, solar radiation, wind speed, atmosphere w ater potential,and vapor pressure deficiency (P<0.01). |
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| Keywords: | Liupan Mountains Larix principi-rupprechtii litter water-holding dynamics environment factor |
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