摘要:
选择小兴安岭主要人工林为研究对象,采集2010 年11 月至2011 年3 月间的林内积雪样品,对其pH 值、电导 率及SO 2 - 4 、NH+ 4 、NO- 3 、Cl- 、K+ 、Ca 2 + 、Mg 2 + 、Fe、Mn 离子质量浓度进行分析研究,为正确评价温带森林涵养水源功能及其可持续经营提供科学依据。结果表明:1)3 种人工林中,Fe,Mn,K+ ,Ca 2 + ,Mg 2 + ,SO 2 - 4 ,NO- 3 离子质量浓度均表现为云冷杉人工林较高,说明其保存营养成分的能力较强,不同类型人工林间差异不显著;2)除NH+ 4 以外,冬季郁闭度最小的落叶松人工林内积雪中各离子质量浓度普遍较低,说明郁闭度对林内积雪的离子质量浓度有一定 影响。
关键词:
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小兴安岭
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人工林
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积雪
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雪化学
Abstract:
The samples of snowpack collected during November 2010 to March 2011 in main type plantations in Xiaoxing'an Mountains, northeastern China were regarded as the research object in order to study the snow chemical characteristics and regularities of forest ecosystem. We measured pH, CD and concentrations of SO 2 - 4 ,NH+ 4 ,NO- 3 ,Cl- ,K+ , Ca 2 + ,Mg 2 + ,Fe and Mn in different type plantations in Liangshui Nature Reserve, southeastern part of Xiaoxing'an Mountains to correctly evaluate temperate forest water conservation function and provide scientific basis for the sustainable management. The results were shown as the followings: 1) The chemical compositions varied among stands with different types,in which Fe, Mn, K+ , Ca 2 + , Mg 2 + , SO 2 - 4 , NO-3 were highest in stands with the artificial spruce-fir plantations, which illustrated that artificial spruce-fir plantation was most effective in retaining nutrients. There was no significant difference among the different types of artificial forest. 2) In addition to NH+ 4 , the ion concentration in snowpack was generally low under the minimum canopy density of Larix gmelinii plantations, indicating that canopy density had influence on the snow ion concentration.
百度学术
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