Hydrochemical characteristics of throughfall and stemflow in a Moso-bamboo (Phyllostachys pubescens) forest

被引:21
作者
Chiwa, Masaaki [1 ]
Onozawa, Yuka [2 ]
Otsuki, Kyoichi [1 ]
机构
[1] Kyushu Univ, Grad Sch, Fac Agr, Dept Forest & Forest Prod Sci, Sasaguri 8112415, Japan
[2] Kyushu Univ, Grad Sch Bioresources & Bioenvironm Sci, Dept Forest & Forest Prod Sci, Sasaguri 8112415, Japan
关键词
bamboo forest; canopy interaction; leaching; neutralization; rainfall partitioning; ATMOSPHERIC DEPOSITION; CANOPY EXCHANGE; DRY DEPOSITION; WATER CHEMISTRY; RAIN-FOREST; SITES; NITROGEN; INTERCEPTION; BUDGETS; SOIL;
D O I
10.1002/hyp.7706
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
To investigate the impacts of the invasion by bamboo on fluxes of nutrients and pollutants, the nutrient/pollutant fluxes and canopy interactions, including neutralization of acidity, leaching and uptake of nitrogen (N), were characterized in conjunction with rainfall partitioning in a Moso-bamboo (Phyllostachys pubescens) forest. Measurements of precipitation volume, pH, major ions, and silicate (SiO2) in rainfall, throughfall and stemflow were collected weekly in a Moso-bamboo forest located in Munakata City, Western Japan for 1 year. Results showed that rainfall partitioning into stemflow was larger than that for other types of forest, which may be due to the properties of Moso-bamboo forest structure, such as a straight and smooth culm. Inorganic N (NO3- + NH4+) and S (SO42-) fluxes of throughfall and stemflow were approximately 1.6 and 1.3 times higher than that of rainfall, respectively. Contribution of stemflow flux to inorganic N and S fluxes to the forest floor was high. This could be due to lower uptake of inorganic N through culm and a higher rainfall partitioning into stemflow than that for other types of forest. The Moso-bamboo canopy neutralized rainfall acidity, reducing the fluxes of potentially acidifying compounds via throughfall and stemflow. Canopy leaching of K+ was distinctly higher than that of Mg2+ and Ca2+ and could be related to the high mobility of K+ in plant tissues. Cl- and SiO2 were readily leached as for K+. The impact of the invasion by bamboo on nutrient cycling was discussed. Copyright (c) 2010 John Wiley & Sons, Ltd.
引用
收藏
页码:2924 / 2933
页数:10
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