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秦岭华山松林生态系统对大气降雨水化学特性的影响
李伟1,3; 张胜利2,3; 孟庆旭1,3; 高国庆1,3
2016
Source Publication西北林学院学报
Volume31Issue:5Pages:15-22
Abstract

基于野外定点监测的方法,根据大气降雨与秦岭华山松林生态系统相互作用的时空顺序,
测定并分析水分传输过程各层次水的pH 及水化学元素沿运移路径的变化过程,获知华山松森林
影响水化学元素沉降变化的关键层次,进而探讨华山松林不同层次对大气降雨水质的影响。结果
表明,华山松林生态系统对偏酸性降雨的pH 有较强的调升能力,林冠和土壤A层对pH 调升作用
较显著,调升幅度分别为0.51、1.01个pH 单位。系统对NH4
+、Pb、Cd2+、Cr均具有吸附净化效
应。吸贮固定NH4
+ 的关键层是土壤层,土壤A、B层对NH4
+ 的吸附净化效果依次为42.31%、
63.11%,净化效果均达到极显著差异(P<0.05);吸贮阻减Pb、Cd2+、Cr的关键层是林冠层,阻减
效果分别为63%、78%、45%;降雨对系统中SO4
2-、NO3
-、PO4
3-、K+、Ca2+、Mg2+、Zn2+、Al 3+ 等
离子表现一定的淋溶效应。其中林冠层是淋溶SO4
2-、PO4
3-、K+ 和Zn2+ 的关键层次,林内雨较大
气降雨4种离子的浓度增幅分别为31%、175%、585%、48%;土壤层是淋溶NO3
-、Ca2+、Mg2+、
Al 3+ 的主要层次,增幅均达显著差异(P<0.05)。其中NO3
- 主要来源于土壤A层,Ca2+、Mg2+ 主
要来源土壤B层,Al 3+ 主要来源于降雨对整个土壤层解吸的Al 3+ 的淋溶作用。

Other Abstract

Based on the spatial and temporal orders of the interactions between the rainfall and Pinus armandii
forest ecosystem in Qinling Mountains,the variation processes of pH and relative chemical elements
of the rainwater were measured and analyzed through field monitoring experiment,so as to check the key
sequential components of the forest,which influenced the chemical elements in water,and to explore the influences
of different components in Pinus armandii forest on atmospheric rainwater quality.The results
showed that the ecosystem could raise the pH of slightly acidic rainwater,and it was more obvious in the
canopy layer and soil layer A,where the increments of pH were 0.51and 1.01,respectively.During the water
transport,soil layer was the key layer to absorb NH4
+,with the absorption rates of 42.31%in the soil
layer A and 63.11%in layer B.While the forest canopy was the key layer to absorb Pb,Cd2+and Cr,and
their concentrations decreased by 63%,78%and 45%,respectively,as the rainwater passed through theforest canopy.The concentrations of SO4
2-,NO3
-,PO4
3-,K+,Ca2+,Mg2+,Zn2+ and Al 3+increased as
they passed through the forest ecosystem.The concentrations of SO4
2-,PO4
3-,K+ and Zn2+ increased
when water moved through the forest canopy,and the concentrations of these ions increased by 31%,
175%,585%,and 48%compared with those in atmospheric rainwater.The concentrations of NO3
-,Ca2+,
Mg2+ and Al 3+ mainly increased when water moved through the soil layer,whose concentration changes
were highly significant(P<0.05).NO3
-increased in the soil layer A,while Ca2 and Mg2+increased in the
soil layer B,and Al 3+increased when rainfall moved through the whole soil layer.

Keyword秦岭 华山松 森林生态系统 层次 水质
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8660
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所
2.西北农林科技大学资源环境学院
3.陕西秦岭森林生态系统国家野外科学观测研究站
Recommended Citation
GB/T 7714
李伟,张胜利,孟庆旭,等. 秦岭华山松林生态系统对大气降雨水化学特性的影响[J]. 西北林学院学报,2016,31(5):15-22.
APA 李伟,张胜利,孟庆旭,&高国庆.(2016).秦岭华山松林生态系统对大气降雨水化学特性的影响.西北林学院学报,31(5),15-22.
MLA 李伟,et al."秦岭华山松林生态系统对大气降雨水化学特性的影响".西北林学院学报 31.5(2016):15-22.
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