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《Journal of Beijing Forestry University》 2005-S2
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Chemical properties of precipitation in Pinus tabulaefomis plantations.

TIAN Ping~1;MA Qin-yan~1;LIU Shi-hai~2;LU Jun-feng~1;CHEN Yuan~1.1 The Key Laboratory for Silviculture and Conservation,Ministry of Education, Beijing Forestry University,100083,P.R.China;2 College of Civil Engineering and Architecture,Beijing Jiaotong Univeristy,100044,P.R.China.  
To reveal the mechanisms and laws that water resources protection forest preserves and improves water quality and to provide theoretical basis for managing and supervising protection forests,the authors studied the chemical properties of precipitation through collecting rainwater from canopy,trunk,litter and soil layer in Pinus tabulaeformis water resources protection forest in Miyun Reservoir,Beijing,from June 1 to September 15 of 2005.Results showed that chemical element contents in water varied greatly in the order of CaNKNaMgFePZnCuMn.The concentration of chemical elements of total precipitation was 10.817 mg/L.The concentration of total chemical elements of through-fall,stem-flow,litter water and soil-layer water were 14.011,29.165,20.724 and 51.704 mg/L respectively.The authors conclude that: the contents of chemical elements of through-fall,stem-flow,litter and soil layer water varied,but the total contents increased in comparison with that of the precipitation and it increased greatly especially through soil layer.It agrees with the study results of other scholars in China.
【Fund】: 国家自然科学基金项目(50409006)
【CateGory Index】: S715;S791.254
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