SUN Xiang-yang,WANG Gen-xu.The Hydro-chemical Characteristics Study of Forest Ecosystem Precipitation Distribution in Gongga Mountain[J].Research of Soil and Water Conservation,2009,16(06):120-124.
贡嘎山森林生态系统降水分配的水化学特征研究
- Title:
- The Hydro-chemical Characteristics Study of Forest Ecosystem Precipitation Distribution in Gongga Mountain
- 分类号:
- S715
- 摘要:
- 以贡嘎山海拔2 900~3 100 m的暗针叶林生态系统为研究对象，分析了大气降水在穿透雨、树干径流、苔藓、土壤和地下水各个过程中干湿季和年际间离子含量变化特点。结果表明：（1）树干径流和穿透雨pH值小于降水，苔藓层可以有效的吸附酸性物质，土壤层酸性较强，森林区河流可以有效的缓解酸性物质；（2）森林区阴离子含量最高的是HCO3-，阳离子含量最高的是Ca2+，离子含量在干湿季的大小顺序不同。降水经过林冠后，除Na+外，离子含量值均呈现出明显的增大趋势，苔藓层对于K+、Ca2+、Mg2+有较强的吸附能力，土壤对于HCO3-的吸附能力较强；（3）苔藓、土壤和林区河流的N / P值均大于16，地表植被的限制因子是P；N、P在大气降水、穿透雨、树干径流、苔藓、土壤、地表水中的变化曲线相似，苔藓层N、P含量较高。
- Abstract:
- Within the dark coniferous with elevation from 2 900~3 100 m in Gongga Mountain, the variation characteristics of pH, ion content, TN, TP in precipitation, through-fall, stem-flow, swamp, soil and runoff are analyzed. The results indicated that: (1) because through-fall and stem-flow absorb amount of acid material, pH value increased; the swamp can absorb and deposit acid material, which makes water quality be better; when the water flow through soil, its pH value increased; surface water can dilute acid material; (2) the ion content of HCO3- is the highest in negative ion, Ca2+ is the highest in positive ion, the content of total ions in dry and wet season is different. All the ion content is higher when drop through canopy except Na+, swamp have stronger absorb ability on K+, Ca2+, Mg2+, while soil can absorb more HCO3-, swamp and soil can purify water; (3) the ratio of N/P of swamp, soil and surface runoff in Gongga Mountain is more than 16, which indicated that the limited factor of vegetation is P; the variation curve of N, P in precipitation, through-fall, stem-flow, surface runoff, swamp, soil is similar, swamp have the highest N, P content. So, swamp and soil can leach and absorb lots of ion, N, P, which have the function of purifying water.
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相似文献/References:
[1]杨新民,杨文治.灌木林地的水分平衡研究[J].水土保持研究,1998,5(01):109.
Yang Xinmin,Yang Wenzhi.Study on the Water Balance in Shrub Land[J].Research of Soil and Water Conservation,1998,5(06):109.
备注/Memo
收稿日期:2009-5-19;改回日期:。
基金项目:国家自然科学基金重点项目（40730634）
作者简介:孙向阳（1985- ）男，吉林榆树人，硕士研究生，主要从事生态水文学研究。E-mail：sunxiangyang03@126.com
通讯作者:王根绪（1965- ），男，博士，研究员，主要从事寒旱区土地覆被与环境变化以及水文学与水资源方面的研究。E-mail：gxwang@lzb.ac.cn