文献类型：期刊文献

中文题名：宁南山区华北落叶松林枯落物水文特征研究

英文题名：Hydrological Characteristics of Larix Principi-rupprechtii Litter in the South Mountainous Area of Ningxia Hui Autonomous Region

作者：刘建立[1,2] 王彦辉[1] 管伟[3] 程丽莉[4] 于澎涛[1] 熊伟[1] 徐丽宏[1]

第一作者：刘建立

机构：[1]中国林业科学研究院森林生态环境与保护研究所;[2]北京林业大学水土保持学院;[3]中国林业科学研究院热带林业研究所;[4]北京市农林科学院林业果树研究所

年份：2009

期号：6

起止页码：20-23

中文期刊名：水土保持通报

外文期刊名：Bulletin of Soil and Water Conservation

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金项目(40730631;40671038;30671677;40801017);科技部"十一五"科技支撑计划项目课题(2006BAD03A1803);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(CAFYBB2007038;CAFRIF200702);科技部科研院所社会公益研究专项项目(2004DIB3J102);国家林业局森林生态环境重点实验室项目

语种：中文

中文关键词：六盘山;华北落叶松;枯落物;截留动态;环境因子

外文关键词：Liupan Mountains; Larix principi-rupprechtii; litter; water-holding dynamics; environment factor

分类号：S782;S715

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)。
To understand the eco-hydrological functions of litter, the water absorbing and releasing speed, the dy- namics 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 Mountains, Ningxia Hui Autonomous Region was selected as research stands. Results showed that the equation for water absorbing speed of litter and its immersed time was y=38.2061nxq-133.38（R2 =-0. 952 1） and the equation for water releasing speed of litter and its immersed time, y=339, le-0.0003x（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 growth season, 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 was significantly and positively related with rainfall depth, but negatively related with temperature, solar radiation, wind speed, atmosphere water potential, and vapor pressure deficiency （P〈0.01）.