摘要
以2006年11月至2007年5月凉水自然保护区内采集的降雪、积雪和溪流融雪径流样品为研究对象，初步探讨森林生态系统内雪化学特征及其变化规律。研究结果表明：降雪中浓度最高的阴、阳离子分别为HCO3^-和C^2＋，pH值为5．94，属微酸性；原始红松林内积雪中各种离子的浓度均高于人工落叶松林、次生白桦林和林间空地，且Ca^2＋，K^＋，Cl^-，NO3^-和HCO3^-存在显著性差异，说明原始红松林是较好的营养库；原始红松林内积雪离子浓度最高值均出现在郁闭度为0．5～0．7之间；保护区内溪流水中离子浓度在融雪径流期里规律性变化。
The samples of snowfall, snowpack and snowmelt runoff collected during November 2006 to May 2007 in Liangshui Nature Reserve were regarded as the research object in order to study the snow chemical characteristics and regularities of the forest ecosystem. The results showed that the concentrations of HCO3^- and Ca^2＋ were highest in snowfall with a weak acidity （pH 5.94）. All ion concentrations in snowpack of primitive Korean pine forest were higher than that of secondary birch forest, artificial larch plantation forest and bare land. Additionally, the significant variances in the concentrations of Ca^2＋, K^＋ ,Cl^-, NO3^- and HCO3^- were shown, which confirmed the primitive Korean pine forest as a better nutrient reservoir. The maximum concentrations of all ions in snowpack of primitive Korean pine forest were detected at a canopy density arranged from 0.5 to 0. 7. In this nature reserve, the ion concentrations in the stream water showed the regular variations during the snowmelt period.
出处
《水土保持学报》
CSCD
北大核心
2008年第2期107-110,165,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目"小兴安岭森林植被变化与河流水文水化学状况耦合机制的研究"(30771713)
中日合作项目"黑龙江支流域生物地球化学过程研究"
关键词
雪化学
降雪
积雪
融雪径流
凉水自然保护区
snow chemistry
precipitation
snowpack
snowmeh runoff
Liangshui Nature Reserve
