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对杉木林生态系统净化水质功能研究结果表明，随着大气降水而进入杉木林生态系统的物质中，有二氯丁烷、苯等有机污染物，还有Ｐｈ、Ｃａ等重金属元素。经过林冠层、地被物和土壤层的截留作用，这些污染物质不仅种类减少，而且浓度大为降低。进一步阐述了森林净化水质的机理和效益。为森林净化水质的功能，提供了依据。
The results of the study on the function of purification water quality of Chinese fir plantation ecosystem showed that organic pollutants such as dichlorobutane and benzene, and heavy metal elements such as Ph, Ca and so on, which enter the ecosystem of Chinese fir plant with precipitation. Through the canopy, ground cover and soil layer retention, these pollutants not only reduce the species, and the concentration is greatly reduced. Further elaborates the mechanism and benefit of forest purification water quality. Provides the basis for the function of the forest to purify water quality.